Materials & Welding: March 2010

Wednesday, March 31, 2010

Re: [MW:4655] Sub contract of weders(UW 26) (d)

If the company is an ASME certified for Code stamps, you can not have sub contract with another company for welders. You have to have contract with individual welders.

arun

On Wed, Mar 31, 2010 at 6:26 PM, Chaitanya Purohit <chaitanya_purohit@yahoo.co.in> wrote:

You can make a contract with company or even with individual welder and in the contract you have to mention that you are responsible to provide training and appropriate qualification to those welder and having "authority to remove them if performance found unacceptable". All Welder qualification records shall be in your company letter head (WPQ format).

You have to maintain the performance record of each welder and record of continuity in case you are using for more than 6 months.

Regards.
CK

On 31 March 2010 11:37, Muhammed Ibrahim <ibratech@gmail.com> wrote:

Hi gents,

I have a query regarding the sub contact of welders.

Eg : I am working in company 'X'. I want to sub contract some welders from company 'Y'. If I qualify that welders as per my company welding pocedure (Company A procedures), is it equired to make a contract with that welders individually?. Or can I make a contract with that supply company?. UW 26 (d) says 'manufacturer may engage idividuals by contract as welder'.

Please povide a reply.

Thanks & Regards
Muhammed Ibrahim PK

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
ARUNACHALAM.A
050-5257122

IT'S BETTER TO LOSE YOUR EGO TO THE ONE YOU LOVE.
THAN TO LOSE THE ONE YOU LOVE ....... BECAUSE OF EGO

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:4651] Multiple PQRs for Impact test requirement

Supporting PQR's qualify the production joint thickness, however check the Base metal group number on PQR, since SA333 Gr6 is Gr1 and SA516 Gr70 falls under Gr2.

WPS should state base metal thickness range as 6-12 and 16-200mm, when impact testing required. and 1.5 to 200mm w/o toughness requirement.

On Wed, Mar 31, 2010 at 7:56 PM, Muhammed Ibrahim <ibratech@gmail.com> wrote:

Hi Members,

Please provide a solution for the following issue.

Shell Material : SA 516 Gr.70 -- 50 mm Thk

Nozzle : SA 333 Gr.6 --- 7 mm thk

MDMT : - 46 Deg.C

I need to weld the nozzle to shell. I have a PQR with SMAW process qualified in 40 mm thk and another PQR with SMAW qualified in 6 mm thk.

As per Sec. IX if impact test is required the 40 mm PQR will support from 16 mm to 200 mm. base metal Thk. and the other PQR will support from 6 mm to 12 mm thk.

If I club these PQR can I write a WPS to support 6 mm to 200 mm?.

Is there any issue for the missing range of qualification between 12 mm to 16 mm?.

Or is it required to add another PQR to fill the missing thickness range from 12 to 16 mm between the first two PQRs?.

Or can I write a WPS directly with range 5mm to 200mm omiting impact test requirement for this joint as it is a category D joint and excempted from Production Test Coupon?.

Thanks & Regards
Muhammed Ibrahim PK

Re: [MW:4650] Bolts failure

Dear Sir,

puneet takiar

Dear Sir,

You have to check the threading depth too.

means it might happen that to overcome looseness of nuts , mfgr has decrease the core dia so as to increase the thread height.

you can check its tensile properties by direct breaking.

Regards,

Puneet

From: Chandra Bhusan Tripathi <cbt@rediffmail.com>
To: Mohamed.Soliman@WorleyParsons.com
Cc: materials-welding@googlegroups.com
Sent: Mon, 29 March, 2010 7:40:52 PM
Subject: Re: [MW:4632] Bolts failure

You can send damaged bolt for tensile testings. Sometime the bolts also fails due to over tightening. Please check with the manufacturer for correct tightening torque.

On Tue, 30 Mar 2010 11:38:16 +0530 wrote
>

Dear all ,

Ihavea casefor the bolts and nutGrade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failedduring the tightening and some of the nuts are loose .

What tests can becarried out to ensure the soundness of those bolts .

Best Regards
M.S

Hotmail: Free, trusted and rich email service.
Get it now.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

*** WORLEYPARSONS GROUP NOTICE ***
"This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it.
If you have received this email in error, please notify us immediately by return email and delete the email and any attachments.
Any personal views or opinions expressed by the writer may not
necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."

--
>
To post to this group, send email to materials-welding@googlegroups.com
>
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
>
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
>
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
>

>
To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
>

Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!.

Re: [MW:4649] Sub contract of weders(UW 26) (d)

You can make a contract with company or even with individual welder and in the contract you have to mention that you are responsible to provide training and appropriate qualification to those welder and having "authority to remove them if performance found unacceptable". All Welder qualification records shall be in your company letter head (WPQ format).

You have to maintain the performance record of each welder and record of continuity in case you are using for more than 6 months.

Regards.
CK

On 31 March 2010 11:37, Muhammed Ibrahim <ibratech@gmail.com> wrote:

Hi gents,

I have a query regarding the sub contact of welders.

Eg : I am working in company 'X'. I want to sub contract some welders from company 'Y'. If I qualify that welders as per my company welding pocedure (Company A procedures), is it equired to make a contract with that welders individually?. Or can I make a contract with that supply company?. UW 26 (d) says 'manufacturer may engage idividuals by contract as welder'.

Please povide a reply.

Thanks & Regards
Muhammed Ibrahim PK

[MW:4648] Multiple PQRs for Impact test requirement

Hi Members,

Please provide a solution for the following issue.

Shell Material : SA 516 Gr.70 -- 50 mm Thk

Nozzle : SA 333 Gr.6 --- 7 mm thk

MDMT : - 46 Deg.C

I need to weld the nozzle to shell. I have a PQR with SMAW process qualified in 40 mm thk and another PQR with SMAW qualified in 6 mm thk.

As per Sec. IX if impact test is required the 40 mm PQR will support from 16 mm to 200 mm. base metal Thk. and the other PQR will support from 6 mm to 12 mm thk.

If I club these PQR can I write a WPS to support 6 mm to 200 mm?.

Is there any issue for the missing range of qualification between 12 mm to 16 mm?.

Or is it required to add another PQR to fill the missing thickness range from 12 to 16 mm between the first two PQRs?.

Or can I write a WPS directly with range 5mm to 200mm omiting impact test requirement for this joint as it is a category D joint and excempted from Production Test Coupon?.

Thanks & Regards
Muhammed Ibrahim PK

Re: [MW:4646] Back gouging of SS

Are you looking for long term solution or temporary solution to complete the project ?

I have used both the methods and found acceptable. If your requirement is temporary and you have facility of in-house testing you can choose Carbon arc gouging.

For carbon are gouging you have to grind 3mm after carbon arc gouging To be assured how much carbon deposition / dilution from the carbon rod occurred, you can do mock up at different depth (after removal of surface layers) and carry out PMI to check carbon % and other main elements and establish the data. The same can be witnessed by client. In my experience there is not much carbon pick up observed and you can get the chemistry at 0.5 to 1.0 mm depth (no need to remove 3mm from the gouged surface).

In plasma hand held torch you need very skill full operators and getting that torch may affect the Project Cost.

You have not mentioned what type of joints and shape & size of the product.

Regards.

On 31 March 2010 09:46, PB HEGDE <hegde.pb@isgec.com> wrote:

Dear Friends

What is the best method of back gouging of SS weld of heavy thickness plate?

Do you prefer

i) Back Gouging by Carbon Arc rod

ii) By Plsama gouging with hand torch

Ia)If By Carbon Arc rod – How much gouged surface you prefer to grind ? to remove carbon contamination

Iia) Is there any special plasma torch available for back gouging

Regards

Hegde P.b.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
C. K. Purohit
Eng-Tech Weld1
Sr Welding Inspector

Re: [MW:4647] Sub contract of weders(UW 26) (d)

individual contract is required.

arun

AIS

On Wed, Mar 31, 2010 at 11:37 AM, Muhammed Ibrahim <ibratech@gmail.com> wrote:

Hi gents,

I have a query regarding the sub contact of welders.

Eg : I am working in company 'X'. I want to sub contract some welders from company 'Y'. If I qualify that welders as per my company welding pocedure (Company A procedures), is it equired to make a contract with that welders individually?. Or can I make a contract with that supply company?. UW 26 (d) says 'manufacturer may engage idividuals by contract as welder'.

Please povide a reply.

Thanks & Regards
Muhammed Ibrahim PK

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
ARUNACHALAM.A
050-5257122

IT'S BETTER TO LOSE YOUR EGO TO THE ONE YOU LOVE.
THAN TO LOSE THE ONE YOU LOVE ....... BECAUSE OF EGO

Re: [MW:4645] NACE Test Requirements

Dear Sandesh,

Please specify clearly what is your requirement??

Regards,

Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

On Wed, Mar 31, 2010 at 10:37 AM, Sandesh Pandey <sandesh.pandey10@gmail.com> wrote:

Dear All

Would you suggest Test requirements for NACE for CS or SS materials.

With warm regards

Sandesh Pandey

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Re: [MW:4643] Back gouging of SS

Hi,

You can use GTAW Twin welders for welding from both side simultaniously to avoid back gouging. Minor back grinding touch up is only required if you use twin weldes. If back gouging un avodable, use plasma arc gouging.

Regards,

Ibrahim

On 31 March 2010 09:46, PB HEGDE <hegde.pb@isgec.com> wrote:

Dear Friends

What is the best method of back gouging of SS weld of heavy thickness plate?

Do you prefer

i) Back Gouging by Carbon Arc rod

ii) By Plsama gouging with hand torch

Ia)If By Carbon Arc rod – How much gouged surface you prefer to grind ? to remove carbon contamination

Iia) Is there any special plasma torch available for back gouging

Regards

Hegde P.b.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

--
Thanks & Regards
Muhammed Ibrahim PK

[MW:4644] Sub contract of weders(UW 26) (d)

Hi gents,

I have a query regarding the sub contact of welders.

Eg : I am working in company 'X'. I want to sub contract some welders from company 'Y'. If I qualify that welders as per my company welding pocedure (Company A procedures), is it equired to make a contract with that welders individually?. Or can I make a contract with that supply company?. UW 26 (d) says 'manufacturer may engage idividuals by contract as welder'.

Please povide a reply.

Thanks & Regards
Muhammed Ibrahim PK

[MW:4642] NACE Test Requirements

Dear All

Would you suggest Test requirements for NACE for CS or SS materials.

With warm regards

Sandesh Pandey

Re: [MW:4641] Back gouging of SS

Dear Friend.

You should use Plasma Gouging with Hand Torch and use the Flapper disc for cleaning.

Regards

Syed Arshad Farooq

QA / QC Engineer

PROCTER & GAMBLE

D.L UNIT KARACHI

(+92-21-111-284-284,5378637-40

): +92-308-3067599

From: PB HEGDE <hegde.pb@isgec.com>
To: materials-welding@googlegroups.com
Sent: Wed, March 31, 2010 10:46:01 AM
Subject: [MW:4640] Back gouging of SS

Dear Friends

What is the best method of back gouging of SS weld of heavy thickness plate?

Do you prefer

i) Back Gouging by Carbon Arc rod

ii) By Plsama gouging with hand torch

Ia)If By Carbon Arc rod – How much gouged surface you prefer to grind ? to remove carbon contamination

Iia) Is there any special plasma torch available for back gouging

Regards

Hegde P.b.

[MW:4640] Back gouging of SS

Dear Friends

What is the best method of back gouging of SS weld of heavy thickness plate?

Do you prefer

i) Back Gouging by Carbon Arc rod

ii) By Plsama gouging with hand torch

Ia)If By Carbon Arc rod – How much gouged surface you prefer to grind ? to remove carbon contamination

Iia) Is there any special plasma torch available for back gouging

Regards

Hegde P.b.

[MW:4639] RE: 4637] SA965/SA788

No as long as sufficient details are given in the TC for establishing that
it conforms to the specification.

Regards,

Abu Rehan Abbasi
+965-97274238
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of qaqcmpm
Sent: Wednesday, March 31, 2010 6:50 AM
To: Materials & Welding
Subject: [MW:4637] SA965/SA788

while reviewing the MTC for SA965, it states

3.2 Material supplied to this specification shall conform to the
requirements of Specification A 788

If the MTC does not have mentioned SA788, is it a non conformance?

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to
materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at
http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and
meant for educational purposes only, Users must take their own decisions
w.r.t. applicable code/standard/contract documents.

To unsubscribe, reply using "remove me" as the subject.

[MW:4638] RE: 4637] SA965/SA788

My opinion, yes: refer 16.1.3.1 of SA788
Reference to Specification A 788/A 788M including the year date together
with the applicable revision letter, if any, of the revision used shall
be a part of the certification.

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of qaqcmpm
Sent: Wednesday, March 31, 2010 9:20 AM
To: Materials & Welding
Subject: [MW:4637] SA965/SA788

while reviewing the MTC for SA965, it states

3.2 Material supplied to this specification shall conform to the
requirements of Specification A 788

If the MTC does not have mentioned SA788, is it a non conformance?

Filtered by Hosted Filtering

To unsubscribe, reply using "remove me" as the subject.

[MW:4637] SA965/SA788

while reviewing the MTC for SA965, it states

3.2 Material supplied to this specification shall conform to the
requirements of Specification A 788

If the MTC does not have mentioned SA788, is it a non conformance?

To unsubscribe, reply using "remove me" as the subject.

Tuesday, March 30, 2010

Re: [MW:4636] Bolts failure

Mr. Soliman,

The easiest test to determine the correct strength properties (and grade) of the bolts is to perform hardness testing on the cross section of the failed bolts. The average hardness on the cross section can be converted to an approximate value of ultimate tensile strength (UTS). If your budget allows, you may also perform a chemical analysis and microstructural analysis, which will tell you if your material is correct and in the proper microstructural condition. Additionaly, you can have the fracture surfaces of the bolts examined with an SEM that can search for failure mechanisms like hydrogen embrittlement but this is getting more expensive.

Regards,

Jeremy Zibin, PEng

From: Chandra Bhusan Tripathi <cbt@rediffmail.com>
To: Mohamed.Soliman@WorleyParsons.com
Cc: materials-welding@googlegroups.com
Sent: Tue, March 30, 2010 1:40:52 AM
Subject: Re: [MW:4632] Bolts failure

You can send damaged bolt for tensile testings. Sometime the bolts also fails due to over tightening. Please check with the manufacturer for correct tightening torque.

On Tue, 30 Mar 2010 11:38:16 +0530 wrote
>

Dear all ,

Ihavea casefor the bolts and nutGrade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failedduring the tightening and some of the nuts are loose .

What tests can becarried out to ensure the soundness of those bolts .

Best Regards
M.S

Hotmail: Free, trusted and rich email service.
Get it now.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

*** WORLEYPARSONS GROUP NOTICE ***
"This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it.
If you have received this email in error, please notify us immediately by return email and delete the email and any attachments.
Any personal views or opinions expressed by the writer may not
necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."

--
>
To post to this group, send email to materials-welding@googlegroups.com
>
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
>
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
>
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
>

>
To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
>

Looking for the perfect gift? Give the gift of Flickr!

Re: [MW:4635] Re: MW: -4617 uniform distribution of austenite in ferrite matrix

Dear Rutvik,

What Hemant told is absolutely right. Since, when austenite is <50 wt.%, materials show net duplex microstructures. But when the austenite percentage is higher than ferrite, a diffusion interface appears at grain boundaries, which modifies all the properties. The objective of this work is to characterize this interface in order to identify its nature and predict the behaviour of the duplex stainless steel. For this purpose, a duplex stainless steel has been produced by mixing ferritic–austenitic stainless steel grade powders, compacting at 700 MPa and sintering in vacuum at 1250 °C for 30 min. The mentioned interface has been studied by SEM and light optical microscopy (LOM) and characterized by nanoindentation in order to determine the hardness and Young's modulus of each phase. Testing mechanical properties completes the study.

Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

On Tue, Mar 30, 2010 at 12:33 PM, hpi001 <pieper-qsi@kpnmail.nl> wrote:

Dear Rutvik,

You will always have differences in the distribution of austenite when
welding is involved. The dendritic austenite structure for the weld is
normal and mostly will have a little bit more austenite than ferrite.
In the heat affected zone always the opposite is present. During
welding and cooling down there will arise more ferrite in the heat
affected zone even when you take the necesary precautions regarding
interpass temp of max. 150 - 175°C. Important is that the base
material have a homogenous distribution of Austenite Islands in a
Ferritic matrix. The requirements for the Ferrite range of 35 - 65 %
is what you should keep in mind. In the weld it will be near to 35%
and in the HAZ near to the fusion line it will be near to the 65%.
The only way to prove that the present microstructure met the
requirements for the corrosion properties is to perform a corrosion
test on this WPS.

Best Regards,

Herman Pieper

On 30 mrt, 00:17, "pgoswami" <pgosw...@quickclic.net> wrote:
> Hi Rutvik,
>
> Typically duplex microstructures what we see, for products like, plates,
> pipes, fittings and other wrought products are lot refined and fine
> grained, through forming , and multiple heat treatments (heating and cooling
> cycles during forming operations). As a compared to a wrought product, micro
> structures of duplex S.S casting would definitely be coarse and chunky.
>
> ASME SA 995 Gr.4A is the cast version equivalent of ASME SA240 S31803
> duplex S.S. Properties of both alloys are comparable when SA 995 Gr.4A is
> properly heat treated after casting. In general weldabilty of cast alloys
> are poorer compared to a wrought alloy, due to coarser grains and
> segregation of alloying elements. If they are properly solution annealed
> after casting, the properties get lot better and are easier to weld.
>
> Welding of castings require precautions required for welding a wrought alloy
> in the same degree or more..
>
> I am not sure what your spec requirements were. NACE MR 0175 Part -7 applies
> tighter restrictions on duplex castings, which are similar to ASME SA 995,
> with supplementary requirements.-
>
> Wrought and cast duplex stainless steels shall:-
>
> * be solution-annealed and liquid-quenched,
>
> * have a ferrite content (volume fraction) of between 35 % and 65 %,
> and
>
> * Not have undergone ageing heat-treatments.
>
> Looking at your query I would propose that you should look in to the
> following tests while qualifying weld procedure for welding of Duplex
> Castings:-
>
> * PQR qualification as per ASME Sec-IX, which includes conventional
> mechanical tests, hardness, charpy impact(if required) and chemical
> analysis.
>
> * Ferrite count as per ASTM E-562.
>
> * Detection of Intermetallic (Sigma) phases as per ASTM E-923
>
> * Pitting corrosion test or other tests as required by the
> specifications.
>
> I have attached some references for you reading .Feel free to drop me a
> line.
>
> Thanks.
>
> Pradip Goswami,P.Eng.
>
> Welding & Metallurgical Engineer/Specialist
>
> Component Integrity Section.
>
> Engineering amd Training Services
>
> Ontario Power Generation Inc.
>
> Res:-88,Garth Trails Crescent
>
> Hamilton,Ontario, L9B2X1,Canada
>
> Email-pgosw...@sympatico.ca
>
> Email-pgosw...@quickclic.net
>
> Tel-905-679-9677
>
> Date: Fri, 26 Mar 2010 17:58:21 +0530
> From: rutvikdi...@yahoo.co.in
> Subject: [MW:4617] uniform distribution of austenite in ferrite matrix
> To: materials-welding@googlegroups.com
>
> Hi everyone,
>
> I am having the WPS for the Duplex SS ( ASTM A 995 Gr.4A) The microstructure
> of weld shows the dendritic austenite in ferrite, HAZ and base metal shows
> no uniform distribution of austenite in ferrite.
>
> The requirement is uniform distribution of austenite in ferrite matrix.
>
> Can this pattern of microstructure cause adverse effect?
>
> With Regards,
> Rutvik
>
> Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!http://downloads.yahoo.com/in/internetexplorer/
>
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding-unsubscribe@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>
> To unsubscribe from this group, send email to
> materials-welding+unsubscribegooglegroups.com or reply to this email with
> the words "REMOVE ME" as the subject.
>
> _____
>
> THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND
> MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL.
> If you are not the intended recipient, you are hereby notified that any
> review, retransmission, dissemination, distribution, copying, conversion to
> hard copy or other use of this communication is strictly prohibited. If you
> are not the intended recipient and have received this message in error,
> please notify me by return e-mail and delete this message from your system.
> Ontario Power Generation Inc.
>
> Duplex S S -Casting.pdf
> 864KWeergevenDownloaden
>
> Duplex Microstructures-Mechnical Properties-Comparison.pdf
> 216KWeergevenDownloaden

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

[MW:4634] Re: MW: -4617 uniform distribution of austenite in ferrite matrix

Dear Rutvik,

You will always have differences in the distribution of austenite when
welding is involved. The dendritic austenite structure for the weld is
normal and mostly will have a little bit more austenite than ferrite.
In the heat affected zone always the opposite is present. During
welding and cooling down there will arise more ferrite in the heat
affected zone even when you take the necesary precautions regarding
interpass temp of max. 150 - 175°C. Important is that the base
material have a homogenous distribution of Austenite Islands in a
Ferritic matrix. The requirements for the Ferrite range of 35 - 65 %
is what you should keep in mind. In the weld it will be near to 35%
and in the HAZ near to the fusion line it will be near to the 65%.
The only way to prove that the present microstructure met the
requirements for the corrosion properties is to perform a corrosion
test on this WPS.

Best Regards,

Herman Pieper

On 30 mrt, 00:17, "pgoswami" <pgosw...@quickclic.net> wrote:
> Hi Rutvik,
>
> Typically duplex microstructures what we see, for products like, plates,
> pipes, fittings and other wrought products are lot refined and fine
> grained, through forming , and multiple heat treatments (heating and cooling
> cycles during forming operations). As a compared to a wrought product, micro
> structures of duplex S.S casting would definitely be coarse and chunky.
>
> ASME SA 995 Gr.4A is the cast version equivalent of ASME SA240 S31803
> duplex S.S. Properties of both alloys are comparable when SA 995 Gr.4A is
> properly heat treated after casting. In general weldabilty of cast alloys
> are poorer compared to a wrought alloy, due to coarser grains and
> segregation of alloying elements. If they are properly solution annealed
> after casting, the properties get lot better and are easier to weld.
>
> Welding of castings require precautions required for welding a wrought alloy
> in the same degree or more..
>
> I am not sure what your spec requirements were. NACE MR 0175 Part -7 applies
> tighter restrictions on duplex castings, which are similar to ASME SA 995,
> with supplementary requirements.-
>
> Wrought and cast duplex stainless steels shall:-
>
> * be solution-annealed and liquid-quenched,
>
> * have a ferrite content (volume fraction) of between 35 % and 65 %,
> and
>
> * Not have undergone ageing heat-treatments.
>
> Looking at your query I would propose that you should look in to the
> following tests while qualifying weld procedure for welding of Duplex
> Castings:-
>
> * PQR qualification as per ASME Sec-IX, which includes conventional
> mechanical tests, hardness, charpy impact(if required) and chemical
> analysis.
>
> * Ferrite count as per ASTM E-562.
>
> * Detection of Intermetallic (Sigma) phases as per ASTM E-923
>
> * Pitting corrosion test or other tests as required by the
> specifications.
>
> I have attached some references for you reading .Feel free to drop me a
> line.
>
> Thanks.
>
> Pradip Goswami,P.Eng.
>
> Welding & Metallurgical Engineer/Specialist
>
> Component Integrity Section.
>
> Engineering amd Training Services
>
> Ontario Power Generation Inc.
>
> Res:-88,Garth Trails Crescent
>
> Hamilton,Ontario, L9B2X1,Canada
>
> Email-pgosw...@sympatico.ca
>
> Email-pgosw...@quickclic.net
>
> Tel-905-679-9677
>
> Date: Fri, 26 Mar 2010 17:58:21 +0530
> From: rutvikdi...@yahoo.co.in
> Subject: [MW:4617] uniform distribution of austenite in ferrite matrix
> To: materials-welding@googlegroups.com
>
> Hi everyone,
>
> I am having the WPS for the Duplex SS ( ASTM A 995 Gr.4A) The microstructure
> of weld shows the dendritic austenite in ferrite, HAZ and base metal shows
> no uniform distribution of austenite in ferrite.
>
> The requirement is uniform distribution of austenite in ferrite matrix.
>
> Can this pattern of microstructure cause adverse effect?
>
> With Regards,
> Rutvik
>
> Your Mail works best with the New Yahoo Optimized IE8. Get it NOW!http://downloads.yahoo.com/in/internetexplorer/
>
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding-unsubscribe@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>
> To unsubscribe from this group, send email to
> materials-welding+unsubscribegooglegroups.com or reply to this email with
> the words "REMOVE ME" as the subject.
>
> _____
>
> THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND
> MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL.
> If you are not the intended recipient, you are hereby notified that any
> review, retransmission, dissemination, distribution, copying, conversion to
> hard copy or other use of this communication is strictly prohibited. If you
> are not the intended recipient and have received this message in error,
> please notify me by return e-mail and delete this message from your system.
> Ontario Power Generation Inc.
>
> Duplex S S -Casting.pdf
> 864KWeergevenDownloaden
>
> Duplex Microstructures-Mechnical Properties-Comparison.pdf
> 216KWeergevenDownloaden

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

Re: [MW:4633] Bolts failure

Metric Bolt Torque Table Estimated with clamp load as 75% of proof load as specified in ISO 898-1
Property Class	8.8		10.9		12.9 Socket Head Cap Screw
Minimum Tensile Strength MPa	M6 - M16: 800 M20 - M30: 830		1040		1220
Nominal Size and Thread Pitch	Bolt Torque Specs in Foot Pounds or (Inch Pounds)
Nominal Size and Thread Pitch	Dry	Lubed	Dry	Lubed	Dry	Lubed
M5 x 0.80	(54)	(41)	(78)	(59)	(91)	(68)
M6 x 1.00	(92)	(69)	(133)	(99)	(156)	(116)
M7 x 1.00	(156)	(116)	(222)	(167)	(260)	(195)
M8 x 1.25	(225)	(169)	(333)	(242)	(377)	(284)
M10 x 1.50	37	28	53	40	62	47
M12 x 1.75	65	49	93	69	108	81
M14 x 2.00	104	78	148	111	173	130
M16 x 2.00	161	121	230	172	269	202
M18 x 2.50	222	167	318	238	372	279
M20 x 2.50	314	235	449	337	525	394
M22 x 2.50	428	321	613	460	716	537
M24 x 3.00	543	407	776	582	908	681
M27 x 3.00	796	597	1139	854	1331	998
M30 x 3.50	1079	809	1543	1158	1804	1353
M33 x 3.50	1468	1101	2101	1576	2455	1842
M36 x 4.00	1886	1415	2699	2024	3154	2366
Lubed means cleaned dry bolts lubricated with a standard medium viscosity machine oil. Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method. Thread Engagement

Metric Bolt Torque Table Estimated with clamp load as 75% of proof load as specified in ISO 898-1
Property Class	8.8		10.9		12.9 Socket Head Cap Screw
Minimum Tensile Strength MPa	M6 - M16: 800 M20 - M30: 830		1040		1220
Nominal Size and Thread Pitch	Bolt Torque Specs in Foot Pounds or (Inch Pounds)
Nominal Size and Thread Pitch	Dry	Lubed	Dry	Lubed	Dry	Lubed
M5 x 0.80	(54)	(41)	(78)	(59)	(91)	(68)
M6 x 1.00	(92)	(69)	(133)	(99)	(156)	(116)
M7 x 1.00	(156)	(116)	(222)	(167)	(260)	(195)
M8 x 1.25	(225)	(169)	(333)	(242)	(377)	(284)
M10 x 1.50	37	28	53	40	62	47
M12 x 1.75	65	49	93	69	108	81
M14 x 2.00	104	78	148	111	173	130
M16 x 2.00	161	121	230	172	269	202
M18 x 2.50	222	167	318	238	372	279
M20 x 2.50	314	235	449	337	525	394
M22 x 2.50	428	321	613	460	716	537
M24 x 3.00	543	407	776	582	908	681
M27 x 3.00	796	597	1139	854	1331	998
M30 x 3.50	1079	809	1543	1158	1804	1353
M33 x 3.50	1468	1101	2101	1576	2455	1842
M36 x 4.00	1886	1415	2699	2024	3154	2366
Lubed means cleaned dry bolts lubricated with a standard medium viscosity machine oil. Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method. Thread Engagement

Dear Soliman,

Bolting Procedures

Place the gasket on the flange surface to be sealed.
Bring the opposing flange into contact with the gasket.
Clean the bolts and lubricate them with a quality lubricant, such as an oil and graphite mixture.
Place the bolts into the bolt holes.
Finger-tighten the nuts.
Follow the bolting sequence in the diagrams above.
During the initial tightening sequence, do not tighten any bolts more than 30% of the recommended bolt stress. Doing so will cause cocking of the flange and the gasket will be crushed.
Upon reaching the recommended torque requirements, do a clockwise bolt-to-bolt torque check to make certain that the bolts have been stressed evenly.
Due to creep and stress relaxation, it is essential to prestress the bolts to ensure adequate stress load during operation.

Torque Tables

These tables were developed to be used with Garlock spiral wound gaskets. They are to be used only as a general guide. They should not be considered to contain absolute values due to the large number of uncontrollable variables involved with bolted joints. If there is doubt as to the proper torque value to use, we suggest that the maximum value be used.

All bolt torque values are based upon the use of new nuts (ASTM A194, GR 2H) and new bolts (ASTM A193, GR B7) of proper design, acceptable quality and approved materials of construction as well as metallurgy. It is also required that two hardened steel washers be used under the head of each nut and that a non-metallic based lubricant (i.e. oil and graphite) be used on the nuts, bolts and washers.

The flanges are assumed to be in good condition and in compliance with ASME B16.5 specifications. Special attention should be given to seating surface finish and flatness. See "Recommended Flange Finish".

Only torque wrenches that have been calibrated should be used. The proper bolt tightening pattern must be followed with the desired ultimate torque value arrived at in a minimum of three equal increments. All bolts in the flange should then be checked in consecutive order in a counterclockwise direction. See "Gasket Installation".

The contact dimensions listed are taken from the ID and OD of the windings, which are different from the ASME ring gasket dimensions.

No provisions have been made in these tables to account for vibration effects on the bolts. These tables are are based on ambient conditions, without compensation for elevated temperatures. If conditions different from these exist, we suggest that further analysis be performed to determine the appropriate torque values.

Regards,

Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

n Tue, Mar 30, 2010 at 9:07 AM, Soliman, Mohamed (kuwait) <Mohamed.Soliman@worleyparsons.com> wrote:

Dear all ,

I have a case for the bolts and nut Grade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failed during the tightening and some of the nuts are loose .

What tests can be carried out to ensure the soundness of those bolts .

Best Regards

M.S

Hotmail: Free, trusted and rich email service. Get it now.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

*** WORLEYPARSONS GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email in error, please notify us immediately by return email and delete the email and any attachments. Any personal views or opinions expressed by the writer may not necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

Re: [MW:4632] Bolts failure

You can send damaged bolt for tensile testings. Sometime the bolts also fails due to over tightening. Please check with the manufacturer for correct tightening torque.

On Tue, 30 Mar 2010 11:38:16 +0530 wrote
>

Dear all ,

Ihavea casefor the bolts and nutGrade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failedduring the tightening and some of the nuts are loose .

What tests can becarried out to ensure the soundness of those bolts .

Best Regards
M.S

Hotmail: Free, trusted and rich email service.
Get it now.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--

To post to this group, send email to materials-welding@googlegroups.com

To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com

For more options, visit this group's bolg at
http://materials-welding.blogspot.com/

The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

*** WORLEYPARSONS GROUP NOTICE ***
"This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it.
If you have received this email in error, please notify us immediately by return email and delete the email and any attachments.
Any personal views or opinions expressed by the writer may not
necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."

--
>
To post to this group, send email to materials-welding@googlegroups.com
>
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
>
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
>
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
>

>
To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
>

Re: [MW:4631] Bolts failure

you have to use the torque chart given in EN according to the bolt size you are using.

Karthikeyan.S

Getabec Energy Co.,Ltd.

379,Moo6,Soi8,Nikhomphatana,

Rayong-21180,

Thailand.

Phone: 0066 38 897035-8 (Off)

Fax: 0066 38 897034

Hand Phone: 0066 892512282

--- On Tue, 3/30/10, Soliman, Mohamed (kuwait) <Mohamed.Soliman@WorleyParsons.com> wrote:

From: Soliman, Mohamed (kuwait) <Mohamed.Soliman@WorleyParsons.com>
Subject: [MW:4630] Bolts failure
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Tuesday, March 30, 2010, 1:07 PM

Dear all ,

I have a case for the bolts and nut Grade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failed during the tightening and some of the nuts are loose .

What tests can be carried out to ensure the soundness of those bolts .

Best Regards

M.S

Hotmail: Free, trusted and rich email service. Get it now.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

*** WORLEYPARSONS GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email in error, please notify us immediately by return email and delete the email and any attachments. Any personal views or opinions expressed by the writer may not necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

[MW:4630] Bolts failure

Dear all ,

I have a case for the bolts and nut Grade 8.8 ,Carbon steel material according to EN 20 898.Those bolts and nuts are failed during the tightening and some of the nuts are loose .

What tests can be carried out to ensure the soundness of those bolts .

Best Regards

M.S

Hotmail: Free, trusted and rich email service. Get it now.

*** WORLEYPARSONS GROUP NOTICE *** "This email is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. If you have received this email in error, please notify us immediately by return email and delete the email and any attachments. Any personal views or opinions expressed by the writer may not necessarily reflect the views or opinions of any company in the WorleyParsons Group of Companies."

Re: [MW:4628] Material Grd B53 And SA106-B

Dear Syah,

For the A53 GrB this specification for pipe, steel, black and hot dipped, zinc coated, welded and seamless. It itended for mechanical and pressure application.

And for the A106 GrB this specification for seamless carbon steel pipe for high temperature service, it suitable for bending, flanging, and similar forming operation and for welding.

Brg

Hong Ky Thai

RE: [MW:4626] Material Grd B53 And SA106-B

Dear syah; the Spec A-106 is only for seamless pipe and can be used according ASME B31.1 (POWER PIPING).
Regards
A.V

Date: Mon, 29 Mar 2010 14:19:57 +0300
Subject: Re: [MW:4621] Material Grd B53 And SA106-B
From: luvshiv2002@gmail.com
To: materials-welding@googlegroups.com

dear syah,

The specification for A53 for Pipe, Steel, Black and Hot dipped, zinc coated, and seamless & for A 106 Specification for seamless Carbon steel pipe for HIGH Temperature service....

On Mon, Mar 29, 2010 at 1:46 PM, Syahrian Zulfan <syahrian09@gmail.com> wrote:

Dear all,

can anyone advice me whether material Grd B53 and SA106-B is same? If yes what is differenting both of its

Rgds,

Syah

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

To unsubscribe from this group, send email to materials-welding+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.

--
Yadav Shiva Chelliya,
Inspection Engineer,
Doha Qatar,
+974-6166465

Hotmail: Trusted email with Microsoft's powerful SPAM protection. Sign up now.

Materials & Welding

Wednesday, March 31, 2010

Re: [MW:4655] Sub contract of weders(UW 26) (d)

Re: [MW:4651] Multiple PQRs for Impact test requirement

Re: [MW:4650] Bolts failure

Re: [MW:4649] Sub contract of weders(UW 26) (d)

[MW:4648] Multiple PQRs for Impact test requirement

Re: [MW:4646] Back gouging of SS

Re: [MW:4647] Sub contract of weders(UW 26) (d)

Re: [MW:4645] NACE Test Requirements

Re: [MW:4643] Back gouging of SS

[MW:4644] Sub contract of weders(UW 26) (d)

[MW:4642] NACE Test Requirements

Re: [MW:4641] Back gouging of SS

[MW:4640] Back gouging of SS

[MW:4639] RE: 4637] SA965/SA788

[MW:4638] RE: 4637] SA965/SA788

[MW:4637] SA965/SA788

Tuesday, March 30, 2010

Re: [MW:4636] Bolts failure

Re: [MW:4635] Re: MW: -4617 uniform distribution of austenite in ferrite matrix

[MW:4634] Re: MW: -4617 uniform distribution of austenite in ferrite matrix

Re: [MW:4633] Bolts failure

Dear Soliman,

Bolting Procedures

Torque Tables

Re: [MW:4632] Bolts failure

Re: [MW:4631] Bolts failure

[MW:4630] Bolts failure

Re: [MW:4628] Material Grd B53 And SA106-B

RE: [MW:4626] Material Grd B53 And SA106-B

[MW:35346] Cast-iron welding

Search This Blog

Wikipedia

Followers