Re: [MW:29662] SS316 Welding - Porosity Intermittent

Due improper baking of electrodes 

On Fri, 31 May 2019, 6:31 pm Raju Kandula, <rgkandula@gmail.com> wrote:

Dear Experts,

   Our project (dosing tank) requires welding of SS316/316L plates of 5mm and 6mm Thickness, while welding of 6mm thickness with back weld, after welding on side-1 and back grinding from other end, we are observing porosity in the centre line with intermittent space during first and second phase. (attached LPT photo for reference)

   Kindly request, to advice your guidance for rectification.

Regards

Raju Kandula

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Re: [MW:29662] Possibility of Crack free in stellite 6 welding?

Thickness is 90mm and penning for stress relieving ( heat stress)

On Thu, 30 May 2019, 6:45 pm Kannayeram Gnanapandithan, <kgpandithan@gmail.com> wrote:

Why are you doing penning? Not 100%. crack free possible if the hardness is more than 35HRC. Why preheat

On Wed, 29 May 2019 9:34 pm Gopalakrishnan G, <gopal2408@gmail.com> wrote:

Dear experts 

 Whether  it is possible to achieve crack free in stellite 6 welding?

I have a job in which I have to carry out hardfacing by stellite 6 and buffer layer with Tenalloy (E-7016).Preheating carried above 350c and interpass 250c with penning and after completion of welding job is covered by heating blanket.

 When I carry out dye penetrant crater cracks appears. But my client needs with 100% crack free.plz kindly give ur valuable guidelines. Thk u.

Regards

G.Gopalakrishnan 

 

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[MW:29660] SS316 Welding - Porosity Intermittent

Dear Experts,

   Our project (dosing tank) requires welding of SS316/316L plates of 5mm and 6mm Thickness, while welding of 6mm thickness with back weld, after welding on side-1 and back grinding from other end, we are observing porosity in the centre line with intermittent space during first and second phase. (attached LPT photo for reference)

   Kindly request, to advice your guidance for rectification.

Regards

Raju Kandula

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Re: [MW:29661]

Backstrip & root gap is not essential variable but particular case you should change variable data

On Fri, May 31, 2019 at 1:28 PM G.K.PILLAI <pillai762000@gmail.com> wrote:

Hi  Gents, 

I have one doubt that we qualified two wps for branch connection as per bsen 15614-1 with branch angle 35degree , main pipe die 800mm branch pipe dia 400mm root gap 2- 5 mm without backing strip and another one wps  is same as above only different that rootgap  8-20 mm (widegap) with backstrip.test results was acceptable. in this both wps can i have to use the single joint .it means  the same degree of the branch joint  half of the joint where ever rootgap 2-5 mm  with out backstrip and another half of the joint wherever root gap 8-20 mm  with back strip based on above wps.please confirm.

Thanks&Regards,

G.K.PILLAI.

MOBILE

+919500755882   (INDIA)

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Re: [MW:29657] ERNiCU7 TIG hot wire cladding weldabilty

For overlaying steel, first, apply a barrier layer of nickel-base overlay shall be used first (high Ni%).

Regards

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

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BSc. in Civil Engineering (IUT)

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On Thu, May 30, 2019 at 5:45 PM 'Neilash Kumar' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Gents , 

Currently am developing procedure using hot wire TIG process using ERNICU7 CLADDING , 

Thickness of cladding minimum 3.2mm , 2layer only

Fe value to be less than 2.5 after 2 layer .

Can you please share your experience regarding the weldability issue and precaution to take care during weld procedure?

Regards 

Neilashkumar 

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Re: [MW:29657] wall thickness tolerance

 10% bilateral  tolerance is acceptable

On Thu, May 30, 2019 at 6:45 PM Alix <seaman.ali11@gmail.com> wrote:

Dear All,

I have the following issue concerning the wall thickness tolerance in API 5L.

 

As I understood, this tolerance is related to the manufactured pipe and not the steel plate (e.g. plates used for LSAW line pipes).

 In other words, if the wall thickness of the required pipe is to be 14.3 mm, can we use a plate of 13.8 mm thickness to produce it or the thickness should be 14.3mm at least? 

  

It would be very helpful if you can explain this case or advise me for some references.

Best regards 

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[MW:29657]

Hi  Gents, 

I have one doubt that we qualified two wps for branch connection as per bsen 15614-1 with branch angle 35degree , main pipe die 800mm branch pipe dia 400mm root gap 2- 5 mm without backing strip and another one wps  is same as above only different that rootgap  8-20 mm (widegap) with backstrip.test results was acceptable. in this both wps can i have to use the single joint .it means  the same degree of the branch joint  half of the joint where ever rootgap 2-5 mm  with out backstrip and another half of the joint wherever root gap 8-20 mm  with back strip based on above wps.please confirm.

Thanks&Regards,

G.K.PILLAI.

MOBILE

+919500755882   (INDIA)

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Re: [MW:29651] Hard Facing_Stellite 6 _reg

Me to facing the same problem....kindly guide me. 

On Mon, 29 Aug 2016, 9:21 am Sivaraman N, <nsivaraman9@gmail.com> wrote:

Dear all,

While doing Hard facing Overlay of stellite 6  on carbon steel and stainless steel  cracks observed during second layer and third layer

Base Material:SA 516 Gr 70 (15 mm thk) & SA 240 TP 316 L(15 mm thk)

Electrode:ECoCrA

Process: SMAW

Overlay thickness:6 mm

How to avoid the cracks during hard facing?

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[MW:29651] wall thickness tolerance

Dear All,

I have the following issue concerning the wall thickness tolerance in API 5L.

 

As I understood, this tolerance is related to the manufactured pipe and not the steel plate (e.g. plates used for LSAW line pipes).

 In other words, if the wall thickness of the required pipe is to be 14.3 mm, can we use a plate of 13.8 mm thickness to produce it or the thickness should be 14.3mm at least? 

  

It would be very helpful if you can explain this case or advise me for some references.

Best regards 

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[MW:29651] ERNiCU7 TIG hot wire cladding weldabilty

Gents , 

Currently am developing procedure using hot wire TIG process using ERNICU7 CLADDING , 

Thickness of cladding minimum 3.2mm , 2layer only

Fe value to be less than 2.5 after 2 layer .

Can you please share your experience regarding the weldability issue and precaution to take care during weld procedure?

Regards 

Neilashkumar 

Re: [MW:29651] Double Normalizing

Generally after Normalising , Hardness will get increased but u have mentioned it reduced . If u do Tempering, again Hardness will come down, and SR also reduce Hardness in turn mechanical properties will get detoriating. 

On Wed, 29 May 2019 9:34 pm George Dilintas, <dilintas@gmail.com> wrote:

which hardness was reduced? That of SA387 or that of the cladding?

What was the normalization temp? 900 deg?

Was the cooling after the normalization done at still air or it was done under the insulation? if you heated at 900degC and then cooled slowly under insulation, then you have recrystallized and increased the grain size, so metallurgical properties have been deteriorated 

The cladding risk sensitization if the ss is not stabilized with Ti. You have to check the cladding to check if chromium carbides have precipitate to the grain boundaries

Στις Δευ, 27 Μαΐ 2019 στις 7:01 μ.μ., ο/η Jayesh Parekh <jayeshparekh34@gmail.com> έγραψε:

Recently we faced one issue. Shell side heat exchanger is by mistake subjected to Normalizing in place of PWHT. Material is SA387 Gr.11 Cl2 with 3 mm SS304L Cladding.THickness22mm+3mm cladding.  So due to this hardness is reduced and it is in range of 140 BHN and overall length is increased. For this issue what will be best solution.

Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour. Due to this heat treatment is there any problem come into materila? Is material property is above minimum required value? What will be effect on SS304L cladding after this much heat treatment? In this condition ,Will equipment suitable for application ? or any other option ? 

Please need expert advice on this issue.

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Re: [MW:29651] Double Normalizing

Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour 

I love to meet the engineer who has specified such a sequence of heat treatments...

Or maybe I am ancient and this is the newest method...

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

On Mon, May 27, 2019 at 8:31 PM Jayesh Parekh <jayeshparekh34@gmail.com> wrote:

Recently we faced one issue. Shell side heat exchanger is by mistake subjected to Normalizing in place of PWHT. Material is SA387 Gr.11 Cl2 with 3 mm SS304L Cladding.THickness22mm+3mm cladding.  So due to this hardness is reduced and it is in range of 140 BHN and overall length is increased. For this issue what will be best solution.

Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour. Due to this heat treatment is there any problem come into materila? Is material property is above minimum required value? What will be effect on SS304L cladding after this much heat treatment? In this condition ,Will equipment suitable for application ? or any other option ? 

Please need expert advice on this issue.

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Re: [MW:29651] Possibility of Crack free in stellite 6 welding?

Why are you doing penning? Not 100%. crack free possible if the hardness is more than 35HRC. Why preheat

On Wed, 29 May 2019 9:34 pm Gopalakrishnan G, <gopal2408@gmail.com> wrote:

Dear experts 

 Whether  it is possible to achieve crack free in stellite 6 welding?

I have a job in which I have to carry out hardfacing by stellite 6 and buffer layer with Tenalloy (E-7016).Preheating carried above 350c and interpass 250c with penning and after completion of welding job is covered by heating blanket.

 When I carry out dye penetrant crater cracks appears. But my client needs with 100% crack free.plz kindly give ur valuable guidelines. Thk u.

Regards

G.Gopalakrishnan 

 

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[MW:29647] Possibility of Crack free in stellite 6 welding?

Dear experts 

 Whether  it is possible to achieve crack free in stellite 6 welding?

I have a job in which I have to carry out hardfacing by stellite 6 and buffer layer with Tenalloy (E-7016).Preheating carried above 350c and interpass 250c with penning and after completion of welding job is covered by heating blanket.

 When I carry out dye penetrant crater cracks appears. But my client needs with 100% crack free.plz kindly give ur valuable guidelines. Thk u.

Regards

G.Gopalakrishnan 

 

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Re: [MW:29647] Suitable filler and and electrodes

for the base metal or for the cladding?

Typical for this base metal E7018 & ER70-6, 

Στις Σάβ, 25 Μαΐ 2019 στις 8:44 π.μ., ο/η JAYAPAL DHAKSHNAMOORTHY <jmoorthy191@gmail.com> έγραψε:

Dear experts,

I have to qualify the the PQR as per (ASME Sec IX 2017)  for the the following

Material: (SA516Gr.60+SB127)+(SA516Gr.60+SB127), that is SA265 Clad plate.

Process: GTAW+SMAW (Image attached below)

Groove: single "V" groove weld.

Thk.:22mm+3mm of clad.

Kindly advise the suitable filler wire and electrode.SFA no. & Classification no. 

Regards.

Dhakshnamoorthy.J

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Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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Re: [MW:29647] Double Normalizing

which hardness was reduced? That of SA387 or that of the cladding?

What was the normalization temp? 900 deg?

Was the cooling after the normalization done at still air or it was done under the insulation? if you heated at 900degC and then cooled slowly under insulation, then you have recrystallized and increased the grain size, so metallurgical properties have been deteriorated 

The cladding risk sensitization if the ss is not stabilized with Ti. You have to check the cladding to check if chromium carbides have precipitate to the grain boundaries

Στις Δευ, 27 Μαΐ 2019 στις 7:01 μ.μ., ο/η Jayesh Parekh <jayeshparekh34@gmail.com> έγραψε:

Recently we faced one issue. Shell side heat exchanger is by mistake subjected to Normalizing in place of PWHT. Material is SA387 Gr.11 Cl2 with 3 mm SS304L Cladding.THickness22mm+3mm cladding.  So due to this hardness is reduced and it is in range of 140 BHN and overall length is increased. For this issue what will be best solution.

Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour. Due to this heat treatment is there any problem come into materila? Is material property is above minimum required value? What will be effect on SS304L cladding after this much heat treatment? In this condition ,Will equipment suitable for application ? or any other option ? 

Please need expert advice on this issue.

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Re: [MW:29647] Suitable filler and and electrodes

For 

GTAW:ER NiCU-7

SMAW:E 7018

Anybody done this process?

On Mon, 27 May 2019, 21:32 Chintan <chintan51@gmail.com wrote:

Use NiCu7

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[MW:29643] PIpe-Copper ASTM B466 UNS noC70600 & Fittings ASTM B151 UNS C70600

Dear Experts,

                    Please give your valuable feed back, I want to run the PQR, PQR as per ASME SEC-IX, What are testing requirement like mechanical , corrosion etc.

                   Suitable consumable,welding or brazing requirement &  Qualifying range?  its P NO-34 as per table.

                    PIpe-Copper ASTM B466 UNS noC70600 & Fittings ASTM B151 UNS C70600.

                    Please advice.

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Re: [MW:29643] Impact test at -210 Deg C

Sir

For which material reqd. Impact at - 210.

I think every body have facilities upto - 196 only. 

Re check your requirements and procede. 

Regards 

A p gupta 

ThyssenKrupp 

QC manager 

Baroda 

Sent from Yahoo Mail on Android

On Mon, 27 May 2019 at 15:09, chiluka venkatramulu

<ramuluchiluka@gmail.com> wrote:

Dear Mr.Guptha,

Thank you for your information. But I enquired with them, they are conducting impact up to -196 Deg C only. Pl let me know if any other labs are there.

Thanks & Regards,m

Venkatramulu C

On Sat, May 25, 2019 at 2:18 PM anand gupta <gupta_0576@yahoo.co.in> wrote:

Check met heat engg. 

Vadodara Gujarat  india. 

They have facilities to do impact at - 210 deg c. 

Regards 

A p gupta 

Sent from Yahoo Mail on Android

On Sat, 25 May 2019 at 11:14, chiluka venkatramulu

<ramuluchiluka@gmail.com> wrote:

Dear All,

Anybody know the mechanical labs, who can conduct impact at -210 Deg C in India.

Thanks & Regards,

Venkatramlu.C

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[MW:29643] Phase diagram for Zirconium n it's alloys

Dear experts,

Need zirconium and it's alloy phase diagram in order to understand the phase transformation from alpha to beta phase.

Kindly share if available

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[MW:29642] Double Normalizing

Recently we faced one issue. Shell side heat exchanger is by mistake subjected to Normalizing in place of PWHT. Material is SA387 Gr.11 Cl2 with 3 mm SS304L Cladding.THickness22mm+3mm cladding.  So due to this hardness is reduced and it is in range of 140 BHN and overall length is increased. For this issue what will be best solution.

Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour. Due to this heat treatment is there any problem come into materila? Is material property is above minimum required value? What will be effect on SS304L cladding after this much heat treatment? In this condition ,Will equipment suitable for application ? or any other option ? 

Please need expert advice on this issue.

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[MW:29643] Suitable filler and and electrodes

Use NiCu7

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Re: [MW:29641] Impact test at -210 Deg C

Check met heat engg. 

Vadodara Gujarat  india. 

They have facilities to do impact at - 210 deg c. 

Regards 

A p gupta 

Sent from Yahoo Mail on Android

On Sat, 25 May 2019 at 11:14, chiluka venkatramulu

<ramuluchiluka@gmail.com> wrote:

Dear All,

Anybody know the mechanical labs, who can conduct impact at -210 Deg C in India.

Thanks & Regards,

Venkatramlu.C

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RE: [MW:29635] I need to do dissimilar weld joint (6xxx series Aluminium to Steel). What filler wire should I choose?

Aluminum can't be directly welded to Steel by any Arc welding process. Arc welding between any steel to aluminum causes formation of intermetallic compounds at the interface, which makes the weld joint extremely brittle. Look at the YouTube, there're many videos on this subject.

 

The only way to perform arc welding of such dissimilar combination is to use a transition piece  of steel to Aluminum, produced by solid state welding process.

This article from ESAB , explains some of the problems of such welding.

 

Thanks.

P.Goswami.P.Eng, IWE.

Independent Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

Cell/Whasapp:1-905-9793232

 

From: 'Karthik' via Materials & Welding [mailto:materials-welding@googlegroups.com]
Sent: May 23, 2019 10:07 PM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: Re: [MW:29631] I need to do dissimilar weld joint (6xxx series Aluminium to Steel). What filler wire should I choose?

 

Hi,

The attached file might be useful to you.

 

Thanks& Regards,

 

(Karthik)

Karthikeyan.S

QA/QC Manager

Agon Pacific Co.,Ltd.

M: +66-655-174-397, +66-892-512-282

E-mail : karthik6684@yahoo.com

 

 

On Thursday, May 23, 2019, 6:44:48 PM GMT+7, Ram <rameshsmit@gmail.com> wrote:

 

 

I need to do dissimilar weld joint (6xxx series Aluminium to Steel). What filler wire should I choose?

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