Materials & Welding: December 2022

Thursday, December 29, 2022

Re: [MW:33884] Low alloy vs high alloy steel

Low alloy less than 5% of individual or aggregate of total number of alloying elements , greater than 5% and less than 10.5% is medium, and above 10.5 high alloy as mentioned for low alloy.

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE, CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer.

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Wed, Dec 28, 2022 at 11:53 AM mithlesh kumar <mithleshmech47@gmail.com> wrote:

Dear expert ,

Please brief difference between low alloy steel vs high alloy steel.

A335 P9 is low or high alloy steel.

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[MW:33882] Alloy 601 (UNS N06601) frogings in ASME/ASTM

Flange PT ratings are not available for the subject grade in ASME B16.5, neither ASTMB564 specified this grade nor any equivalent ASTM spec?
How are these flanges used in Vessels or Piping when designed to ASME ?

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Wednesday, December 28, 2022

Re: [MW:33878] Low alloy vs high alloy steel

Dear Mr. Mithlesh kumar,

when we adding the total alloying elements of Cr,Ni,Mo, if the total is less than or equal to 10% this is low alloy steel, total alloys are greater than 10 % that is high alloy steel.

A335 P9 - low alloy steel pipe.

Regards,

Sankaran.SP

Welding & Metallurgy expert

Coimbatore, India.

On Wednesday, 28 December, 2022 at 11:53:51 am IST, mithlesh kumar <mithleshmech47@gmail.com> wrote:

Dear expert ,

Please brief difference between low alloy steel vs high alloy steel.

A335 P9 is low or high alloy steel.

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Re: [MW:33878] Re: Duplex, super duplex stainless steel repair

It's normal with this material experience happening in Aramco different site .

You need to conduct 100% RT for but joint and conduct PT for branch connection.additionaly UT can be done .

For repair you need to conduct repair only for this as per requirement in SAES -W-16 separate repair WPS required .that repair procedure should be done full thickness repair..

On Wed, 28 Dec 2022, 11:02 Mohd Siraj, <mohd52100@gmail.com> wrote:

I will do two additional things,

1. check pickling and passivation are done properly after fabrication.
2. hydrotesting water is potable water and is clean with very clean air/dry air after the test.

The welding engineer is giving 300% attention during the fabrication which is true..but leave welding after welding and post-welding precaution is not taking place.

On Thursday, December 8, 2022 at 10:52:39 AM UTC+3 GANESH MUTHURAJAN wrote:
Good morning sir,

Now i working with duplex and super duplex , RO plant.

How to do the repairs in this material, for example we found two segment in 10 mm in 14 inch pipe.

Can we do partial repair, or fully cutout and reweld. Any code reference advice to do full cutout, or partial.

Second case this plant was handed over to the Clint, during commissioning we found leakage, not only the butt joint, even in the branch connection,

Aramco advise to do 100 %rt butt joint and branch.

Branch we can't do RT, placing a film is deficult. What to do in this.

Please advise me your experience and international, Aramco code reference.

Thank you

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Re: [MW:33878] Re: NDT Supplier Assessment

This must be available in Ur quality documents to conduct Audit for your service provider as per schedule..

On Wed, 28 Dec 2022, 11:02 Mohd Siraj, <mohd52100@gmail.com> wrote:

you mean,

NDT subcontractor or NDT material supplier (vendor)?

On Monday, December 12, 2022 at 5:14:36 PM UTC+3 Vivek wrote:
Dear Members,

For NDT supplier assessment, Do we have any audit format/audit checklist?

Thank You
Best Regards
Vivek

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Re: [MW:33878] Re: NDT Supplier Assessment

Hi,

NDT contractor.

Regards,

Vivek

On Wed, Dec 28, 2022 at 1:32 PM Mohd Siraj <mohd52100@gmail.com> wrote:

you mean,

NDT subcontractor or NDT material supplier (vendor)?

On Monday, December 12, 2022 at 5:14:36 PM UTC+3 Vivek wrote:
Dear Members,

For NDT supplier assessment, Do we have any audit format/audit checklist?

Thank You
Best Regards
Vivek

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[MW:33874] Re: Impact tests on PQR (ASME B31.3)

you can extract sample, 1.5mm from bottom that for root process and one from middle that from smaw.

so if u refer figure for impact it is quite clear.

however meaning is same u stated.

On Thursday, December 15, 2022 at 7:06:37 AM UTC+3 fernando...@gmail.com wrote:

referring to impact tests for qualification of welding procedures, it is reasonable to define that for the design situation according to ASME B31.3, in circumferential joints welded by two processes (GTAW -root / SMAW - others), each process must be separately impact tested (in the same way as it is done today for ASME VIII div 1)?

There is no text that makes this statement explicitly on B31.3.

Thanks and regards,

Fernando Lescovar Neto IWE

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[MW:33874] Re: PSV & PRV Related Installation Handling Removal Viedos

i can understand your situation,

pl refer API-576 para 6,8 and API520. would be useful.

On Tuesday, December 13, 2022 at 10:13:28 AM UTC+3 PK wrote:

Dear Experts,

Anyone Have Please Forward

PSV & PRV Related Installation Handling Removal Videos And Procedure,ITPs.

Thank You.
PK

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Re: [MW:33870] Stabilizing treatment of SS plate /components

chromium depletion in the surrounding area. Corrosion is therefore limited to zones where niobium carbide has been re-dissolved, i.e. zones in the immedi ate vicinity of the weld. These zones are rather narrow and this type of inter granular corrosion attack is thus called knife line corrosion. Its appears only in stabilized aus tenitic materials in both the HAZ of the base metal and the HAZ of the weld metal in multi-layer welds or where there are two or more parallel weld deposits. Fig. 88 shows the appearence of some typical welded joints where intergranular corrosion has taken place according to Schabereiter [253]. After welding, these specimens were annealed in the temperature range of550-600° C and then subject ed to the Strauss test. In the unstabilized, corrosion susceptible materials (upper micrographs), intergranular corrosion attack occurs over the whole area of the weld metal (Fig. 88a) and the base metal (Fig. 88b). The specimens were taken from the top run of a single V but weld of 20 mm thickness. Intergranular corrosion attack is only visible in the deformed part of the bent specimen, where the area attacked by intergranular corrosion has opened up. In niobium stabilized weld metal (ratio of stabilization- % Nb : % C = approx. 10 : 1), intergranular knife line corrosion Fig. 88. Different types of intergranular corrosion in weldments after prolonged annealing in the temperature range of around 5500 C obtained in the Strauss test according to Schabereiter [253]. Upper micrographs-Unstabilized chromium-nickel steels of the type AISI 308; a inter granular corrosion in the IC prone weld metal, b intergranular corrosion in the heat affected zone of the IC prone base metal. Lower micrographs-Niobium stabilized chromium-nickel steel of type AISI 347. c knife line corrosion in the heat affected zone between the three beads of the top layer ofintergra.nular corrosion prone weld metal, d knife line corrosion in the HAZ of the intergranular corrosion prone base metal gerry_tup@yahoo.com 4.1 Carbide Precipitations in Stainless Steels 123 appears in the heat affected zone between the three beads of the top layer of the weld (Fig. 88c). The bead in the middle which had been deposited last, produced knife line corrosion in the heat affected zone ofthe previously deposited outer beads of the top layer. If the weld metal is sufficiently resistant to intergranular corrosion attack, but the base metal is not, corrosive attack will be limited to the heat affected zone of the base metal on both sides of the weld (Fig. 88d). The occurrence of knife line corrosion in the HAZ after annealing in the temperature range of 500-700° C can be avoided by lowering the carbon content to below 0.04% with a simultaneous overstabilization to at least one and a halftimes the normal stabilization ratio (with titanium> 8 X % C, with niobium> 15 X % C). Heat treatments of 10-15 hours in the temperature range of 500-600° C are most critical. If annealing takes place at higher temperatures, a smaller degree of over stabilization will normally be suffice since re-diffusion of chromium in the depleted zones is already apparent in such cases. Fig. 89 shows the areas of grain decay caused by intergranular corrosion in austenitic weld metal with different chromium contents and varying stabi lization ratios which clearly shows the influence of alloying elements. The behav iour of stabilized austenitic weld metal is mainly governed by the combined effect of the three elements carbon, niobium and chromium which are interdependent with regard to their effect on knife line corrosion. An additional factor to be consid ered in this context is the fact that niobium contents above 1% will increase the hot cracking sensitivity and chromium contents above 20% will increase the tendency towards sigma phase precipitation. Therefore, an increase in these two elements is limited and for a change in content we must always consider the overall property requirement of the weld metal. mOr-----,------,------.------, 500~----~------~----~~--=-~~ 0,1 Time in hours Fig. 89. TTC diagram of the beginning of inter granular corrosion attack with consideration to knife line corrosion in austenitic weld metals with different contents of chromium and nio bium. Chemical composition in %: No.1: C= 0.027, Si= 0.63, Mn= 1.55, Cr= 17.97, Ni= 9.00, Nb = -; No.2: C= 0.027, Si = 0.74, Mn = 1.71, Cr= 20.07, Ni = 10.02, Nb = -; No.3: C = 0.033, Si = 0.70, Mn = 1.75, Cr = 21.20, Ni = 11.08, Nb = 0.30; No.4: C = 0.035, Si = 0.85, Mn=1.58, Cr=17.98, Ni=8.97, Nb=0.55; No.5: C=0.031, Si=0.62, Mn=1.78, Cr = 19.96, Ni = 10.14, Nb = 0.65

On Monday, 26 December, 2022 at 11:18:06 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Mainly avoids WELD DECAY.

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 10:21:46 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Just to add, the purpose of this HT is to form stable TiC & NbC and hence the name stabilization HT

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 09:28:49 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Basically it is performed to form TiC and/ NbC and so no further C available for IGC attack/

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 08:48:47 am IST, 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Mr.Prakash,

stabilized heat treament is required for stablized staniless steel only, not for all SS grades.

stabilizing alloys of Like : Nb/Cb, Ti ,Zr & others are speciafiaclly added in the normal SS aloys to avoid senstitization, after solution heat treatement we don't know about whether these stabilzed alloys are setteld in grain boundry or in the core. hence to ensure the stabilized alloys in grain boundry this stabilized heat treatment is essential, as per ASTM A 182 ot ASTM A 351 this stabilized heat teratment is given as subimentary variable for forging & casting respectively. During stabilized heat treatement soaking hour to given as 4 hour (min).

Regards,

Sankaran.SP

Welding & Metallurgy expert

Coimbatore, India.

On Thursday, 22 December, 2022 at 08:53:38 am IST, 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Hi! Friends

Why some of the client spec ask for

Stabilizing treatment (At lower temperature than solution annealing i.e. about 900C) of already solution annealed plate but not Welded SS components

Especially 304H,347,321

Regards

Hegde

[MW:33870] Low alloy vs high alloy steel

Dear expert ,

Please brief difference between low alloy steel vs high alloy steel.

A335 P9 is low or high alloy steel.

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Monday, December 26, 2022

Re: [MW:33863] Stabilizing treatment of SS plate /components

Is Zr is stabilize element, of so, what is classification of ASS.

On Mon, Dec 26, 2022, 8:40 AM 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Mr.Prakash,

stabilized heat treament is required for stablized staniless steel only, not for all SS grades.
stabilizing alloys of Like : Nb/Cb, Ti ,Zr & others are speciafiaclly added in the normal SS aloys to avoid senstitization, after solution heat treatement we don't know about whether these stabilzed alloys are setteld in grain boundry or in the core. hence to ensure the stabilized alloys in grain boundry this stabilized heat treatment is essential, as per ASTM A 182 ot ASTM A 351 this stabilized heat teratment is given as subimentary variable for forging & casting respectively. During stabilized heat treatement soaking hour to given as 4 hour (min).

Regards,
Sankaran.SP
Welding & Metallurgy expert
Coimbatore, India.

On Thursday, 22 December, 2022 at 08:53:38 am IST, 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Hi! Friends
Why some of the client spec ask for
Stabilizing treatment (At lower temperature than solution annealing i.e. about 900C) of already solution annealed plate but not Welded SS components

Especially 304H,347,321

Regards
Hegde

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Re: [MW:33863] Welding Cast Iron & G.I

expand GI

On Mon, Dec 26, 2022, 1:02 PM Manoj Singh <manoj.singh1178@gmail.com> wrote:

Dear Experts,

Does any one experienced welding of G.I and Cast Iron in their career time, Is it possible to weld the said metal, if someone has the experience please share the details of the same.
As we are trying to weld the said metal it is cracking at the same time before cooling.

Your comments will be highly appreciable.

Thanks & Regards,

Manoj Singh

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Re: [MW:33863] Weld overlay PQR UNS 31254 (P8 Gr 4) To overlay SA516 GR70 overlay by ER Ni Cr MO-3

Regarding PQR Qualification,

Weld a clad plate of similar composition (as production Joint) with 254 SMO Alloy plate (based on production joint dissimilar thickness allowed)

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 08:40:51 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Weld the joint as per attached configuration as a single vee joint using alloy filler wire/electrode such as ER/E NiCrMo3 for the complete joint.

Thanks & Regards

J.Gerald Jayakumar

On Friday, 23 December, 2022 at 04:35:28 pm IST, atul jha <atulkrjha21@gmail.com> wrote:

Dear sir

I Have to establish a PQR as per below detail :-

Material 1 : SA 516 gr 70 overlay of 3 mm by NiCrmo-3 ( done at vendor works).

Material 2 : A182 Gr F 44 UNS S 31254.

Code of construction ; B31.3.

Pwht : none

I have to weld this joint in our plant as per attach figure.

QUERY: can a PQR with P1 to P8 by nicrmo-3 will serve the purpose OR I have to establish a PQR P1 ( cladded by nicrmo-3 ) to P8 welded by NicrMO-3 . I want to go with 1 st case

Does change in welding process also affect the above choice .

Kindly note that these vessel are for ARAMCO.

Kindly explain and guide me accordingly.

Regards

Atul jha

B.E in welding Technology.

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Re: [MW:33863] Single pass fillet weld (6 mm leg length) using 1mm GMAW wire

Stainless steel is the name for a range of steels used primarily because of its

corrosion resistance. It is made up of chromium, iron and (in some cases) nickel, molybdenum and other metals. For a metal alloy (a metal made by combining

two or more metallic elements) to be considered stainless steel, it should consist

of at least 10.5% of Chromium; this composition prevents the iron in stainless

steel rusting and provides heat-resistant properties.

As this is to be deemed stainless steel, a huge number of metal alloys fall into

this category. These have been split into five groups (or families) of stainless steel:

1) Austenitic

2)         Ferritic
3)         Duplex
4)         Martensitic
5)         Precipitation hardening steels

Of the five families, austenitic stainless steel is the largest. This family comprises

of two sub-groups, the 200 and 300 series – with the 300 series alone accounting

for nearly 50% of the stainless steel market.

Sridhar.

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

On Monday, 26 December, 2022 at 08:46:49 am IST, Ubaidah Salam <us06095@gmail.com> wrote:

Hi,

Guys, can someone Tell me the different categories/types of stainless steels.

It's an interview question...!

On Thu, 22 Dec 2022, 07:23 'Sridhar Cn' via Materials & Welding, <materials-welding@googlegroups.com> wrote:

There are code limitations in achieving fillet sizes. You can get even a
8 mm size fillet using 1.00 mm filler wire in a single pass or a 6 mm
fillet using 0.80 mm size wire also.
Select your parameters to achieve the required fusion and penetration
without an undercut.

Sridhar.
-------------------------------------------------------------------------------------------

On Tuesday, 20 December, 2022 at 08:49:28 am IST, Ganesh R nair <ganeshrnair9@gmail.com> wrote:

Dear all,

Is there any code limitations to use 1mm mig wire to achieve 6mm fillet weld (leg length) in a single pass.

Thanks,
Ganesh R Nair

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[MW:33861] Welding Cast Iron & G.I

Dear Experts,

Does any one experienced welding of G.I and Cast Iron in their career time, Is it possible to weld the said metal, if someone has the experience please share the details of the same.

As we are trying to weld the said metal it is cracking at the same time before cooling.

Your comments will be highly appreciable.

Thanks & Regards,

Manoj Singh

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[MW:33859] Re: PQR Qualification

A single WPS will suffice this requirement , Mr.Williamns your undestanding was correct ,

ensure consuambels are using while production welding are meeting the requirment of Gr.70 plate weding in WPS as a note.

if you want to support this PQR for pressure vessels u need SA 516 Grade 70 65 60 MTLTV to SA 516 Grade 70 65 60 MTLTV (mostly prefered combination )- it can support for all the combinations

in other case you can have one side it is SA 516 Grade 70 65 60 MTLTV and other side SA 516 Grade 65 plate for plate to pipe /flange /fitting scope (better avode this ) - some clients wants this combination also.. u can concence them with code.

Regards,

Srinivas Rao
welding Engineer

On Thursday, December 22, 2022 at 7:23:32 AM UTC+4 Zacharias Rohith Joseph wrote:

All these are P1 materials then they should be qualified by default.

On Monday, 28 November 2022 at 16:27:00 UTC+13 williamswilsonp wrote:
Dear Experts,

I have a doubt noted below for your advice.

If I used the Steel Designation SA 516 Grade 70 65 60 MTLTV for procedure qualification. I will be qualified for P1 G 1 / 2 To P1 G 1 / 2
Single PQR / WPS satisfy my below welding requirements.
(Toughness & PWHT considered)
1) SA 516 Gr.70 to SA 516 Gr.70
2) SA 106 Gr. B to SA 105
3) SA 106 Gr. B to SA 106 Gr. B

Thank You & Regards
Williams P Wilson
+968-94600828
QA/QC Engineer
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Re: [MW:33858] Stabilizing treatment of SS plate /components

Mainly avoids WELD DECAY.

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 10:21:46 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Just to add, the purpose of this HT is to form stable TiC & NbC and hence the name stabilization HT

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 09:28:49 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Basically it is performed to form TiC and/ NbC and so no further C available for IGC attack/

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 08:48:47 am IST, 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Mr.Prakash,

stabilized heat treament is required for stablized staniless steel only, not for all SS grades.

Regards,

Sankaran.SP

Welding & Metallurgy expert

Coimbatore, India.

On Thursday, 22 December, 2022 at 08:53:38 am IST, 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Hi! Friends

Why some of the client spec ask for

Stabilizing treatment (At lower temperature than solution annealing i.e. about 900C) of already solution annealed plate but not Welded SS components

Especially 304H,347,321

Regards

Hegde

Re: [MW:33857] Stabilizing treatment of SS plate /components

Just to add, the purpose of this HT is to form stable TiC & NbC and hence the name stabilization HT

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 09:28:49 am IST, 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Basically it is performed to form TiC and/ NbC and so no further C available for IGC attack/

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 08:48:47 am IST, 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Mr.Prakash,

stabilized heat treament is required for stablized staniless steel only, not for all SS grades.

Regards,

Sankaran.SP

Welding & Metallurgy expert

Coimbatore, India.

On Thursday, 22 December, 2022 at 08:53:38 am IST, 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Hi! Friends

Why some of the client spec ask for

Stabilizing treatment (At lower temperature than solution annealing i.e. about 900C) of already solution annealed plate but not Welded SS components

Especially 304H,347,321

Regards

Hegde

Re: [MW:33856] Stabilizing treatment of SS plate /components

Basically it is performed to form TiC and/ NbC and so no further C available for IGC attack/

Thanks & Regards

J.Gerald Jayakumar

On Monday, 26 December, 2022 at 08:48:47 am IST, 'Sankaran Sp' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Mr.Prakash,

stabilized heat treament is required for stablized staniless steel only, not for all SS grades.

Regards,

Sankaran.SP

Welding & Metallurgy expert

Coimbatore, India.

On Thursday, 22 December, 2022 at 08:53:38 am IST, 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Hi! Friends

Why some of the client spec ask for

Stabilizing treatment (At lower temperature than solution annealing i.e. about 900C) of already solution annealed plate but not Welded SS components

Especially 304H,347,321

Regards

Hegde

Materials & Welding

Thursday, December 29, 2022

Re: [MW:33884] Low alloy vs high alloy steel

[MW:33882] Alloy 601 (UNS N06601) frogings in ASME/ASTM

Wednesday, December 28, 2022

Re: [MW:33878] Low alloy vs high alloy steel

Re: [MW:33878] Re: Duplex, super duplex stainless steel repair

Re: [MW:33878] Re: NDT Supplier Assessment

Re: [MW:33878] Re: NDT Supplier Assessment

[MW:33874] Re: Impact tests on PQR (ASME B31.3)

[MW:33874] Re: PSV & PRV Related Installation Handling Removal Viedos

Re: [MW:33870] Stabilizing treatment of SS plate /components

[MW:33870] Low alloy vs high alloy steel

Monday, December 26, 2022

Re: [MW:33863] Stabilizing treatment of SS plate /components

Re: [MW:33863] Welding Cast Iron & G.I

Re: [MW:33863] Weld overlay PQR UNS 31254 (P8 Gr 4) To overlay SA516 GR70 overlay by ER Ni Cr MO-3

Re: [MW:33863] Single pass fillet weld (6 mm leg length) using 1mm GMAW wire

[MW:33861] Welding Cast Iron & G.I

[MW:33859] Re: PQR Qualification

Re: [MW:33858] Stabilizing treatment of SS plate /components

Re: [MW:33857] Stabilizing treatment of SS plate /components

Re: [MW:33856] Stabilizing treatment of SS plate /components

[MW:35346] Cast-iron welding

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