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umesh vikram
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Join Date: Jan 2009
Posts: 32

Retest of Failed WPS

12/11/2013 3:58 AM

We have done PQR by welding EH36 & A514 Gr Q together,During the PQR test the materials failed in hardness test, requied value was 350Hv10 max and observed value was 380,400,...Hence this WPS is rejected.Does section IX allows to make a new test piece and check only hardness or again we need to do all the mechanical test(UTS,Impact).

Welding code:AWS D1.1
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: Restest of Failed WPS

12/11/2013 4:14 AM

All of them. (Any change that corrects the hardness issue could affect the others.)

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bigg
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Join Date: Jun 2010
Posts: 1296
Good Answers: 104
#5
In reply to #1

Re: Retest of Failed WPS

12/11/2013 11:11 AM

You're assuming OP intends to change something! Re-read the title. (Scary, huh?)

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Anonymous Poster #1
#2

Re: Restest of Failed WPS

12/11/2013 7:52 AM

I think you have done Temperbead PQR. Hardness is very important in temperbead welding.
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Anonymous Poster #1
#3

Re: Restest of Failed WPS

12/11/2013 7:58 AM

Do not forget to do Bend tests (Face Bend,Root Bend and Side Bend according to thickness of test specimen) at the time of Tensile Test & Charpy 'V' notch Impact Test.
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umesh vikram
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Join Date: Jan 2009
Posts: 32
#8
In reply to #3

Re: Restest of Failed WPS

12/12/2013 12:29 AM

Following test has been done:Tensile,Side bend,Charpy & hardness
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Anonymous Poster #2
#4

Re: Restest of Failed WPS

12/11/2013 8:41 AM

A 514 Gr. Q .ie, Quenched&Tempered.

What about EH 36 condition?
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Anonymous Poster #3
#6

Re: Retest of Failed WPS

12/11/2013 9:20 PM

Hardness reading observed on WCL or FL or FL+2 or FL+5 ? If it was not in WCL then specify in which material location (A 514 Gr.Q or EH 36).
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umesh vikram
Associate

Join Date: Jan 2009
Posts: 32
#7
In reply to #6

Re: Retest of Failed WPS

12/12/2013 12:27 AM

Hardness failed observed on WCL on A514 Gr Q
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Kwetz
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Spain - Member - New Member Engineering Fields - Nuclear Engineering - New Member

Join Date: Oct 2007
Location: Madrid, Spain
Posts: 716
Good Answers: 25
#9

Re: Retest of Failed WPS

12/13/2013 6:16 AM

The problem is not to repeat the test. The most important thing is to determine WHY have you get that high hardness. If you do not optimize the welding parameters,and change WPS accordingly, you can pass the qualification and get bad production welds...

Kind regards

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