PQR qualification (material)

Date 07-21-2008 19:56

Guys

We recently aquired another company as well as their qualifications and certifications. One of their D1.1 tests is 1G Vee groove (3/8" thick) with backing/ Material is A514 T-1 plate, weld wire qualified is ER100S-G .045" dia ( We use Lincoln LA-100).
The jist of my question is, I was told by the CWI that came with this company ( he is no longer here) that he qualified this test so it covers all the lesser strength materials as well. I cannot find any nomenclature anywhere that specifically states this ? I see in the essential variables requiring re-qual, you can go to a lesser strength filler wire,,,,but I cannot find anywhere that states if you qualify with a class 3 material, that is qualifies you for class 2 and class 1 ??? If this is the case, could one of you lead me where to find this...

Thanks everyone in advance.

By James Corbin (**)

Date 07-22-2008 19:38

A514 is listed in the D1.1-06 Table 4.9 and for under 2.5 inch thick its listed matching strength would be 110ksi electrodes. (LA 100 meets this requirement using 98/O2 shielding w/30 to 45 kJin welding procedures. Your PQR test results should list the Specific Volts, Amps, TS, Yield/Tensile, shielding, KJin, material combinations used etc.)

That aside Table 4.8 PQR base material choice 4 lists "Any Specific Group III (Table 3.1) or Table 4.9 Steel to Any Group II Steel would let you weld the PQR specified Table 4.9 (you used in the test) Steel to any Group 1 or 2 Steel.
It goes downhill from here.
The Table 4.8 choice 5 is Any Table 4.9 to to any Table 4.9 steel would let you only weld the PQR as tested steel to each other.

Do you have any more specific information off the PQR you could share for a better analysis?

By cfrancis (**)

Date 07-23-2008 14:45

Hi James

I am going to take your comments and research them and I thank you for them. I believe the "jist" of what you are stating is that seeing how we have qualifications with this class 3 material, we are qualified tthen to weld class 2 and class 1 ? Is that safe to say in a nutshell ?

By James Corbin (**)

Date 07-23-2008 15:30

As long as the PQR was done with (as an example) A514 (a Table 4.9 material) to A572 gr50 (a Table 3.1 Group 2 material) then YES!
If it was done A514 to A514 then NO!

By cfrancis (**)

Date 07-23-2008 16:01

James---gotchya Thank you. The test was 514 to 514. So,,if the test was a class 3 to a class 1 or 2,,then I wouldnt be qualified for class 3 to class 3 then the way I understand it?

By James Corbin (**)

Date 07-23-2008 16:42

Group III or Table 4.9 steel welded to a Group 1 steel = Only specific tested steel to any Group 1 steel
Group III or Table 4.9 steel welded to a Group 2 steel = Only specific tested steel to any Group 1 or 2 steel

Once you use a Group III or Table 4.9 steel that steel is specific to the PQR/WPS -- The Group 1 or 2 would not be specific

By rickc

Date 07-23-2008 17:23

Actually, I have put in a formal request for interpretation on this matter last year but, I'm still waiting for a response.

The way the book is written if you qualified 514 Gr. B to 514 Gr. B then you are ONLY allowed to weld 514 Gr. B to 514 Gr. B because it has to be the same "grade/type" or specific Table 4.9 steel per Table 4.8. However, I think the intent as demonstrated by Note 2 on Table 4.8, Table 4.9, Table C-2.4, previous editions of the code, the ASTM standard for the material and simple logic is that you'd be allowed to weld and 514 2-1/2" and under to any other 514 2-1/2" and under (i.e. grades A, B, F, H and S). And, possibly thicker grades of 514 (i.e. grades E, P & Q) as well based on Note 2 in Table 4.8. However, until they respond to the request for interpretation we'll never know.

However, I've got a potential short cut for you: What year or to what edition of D1.1 was that coupon run too? Section 4.2.1 of AWS D1.1-2006 accepts qualifications to older editions of the code if they were the governing standard at the time. Many of the older editions were alot more lenient with what you'd be allowed to do with your 514 coupon.

By cfrancis (**)

Date 07-23-2008 17:54

Thank you all very much for aiding myself in understanding this more clearly. I have one other question. We have a large portion of our work done on A656 Gr 80 material which I use ER80S-D2 filler. I cant find this material in table 3.1 or annex M to tell me what group # it's in ?

By James Corbin (**)

Date 07-23-2008 18:34

A656 High Strength Low Alloy Gr80 max thickness 3/4 inch is an "Unlisted Steel" in Table 4.8 (D1.1-06 Table 4.9 is D1.1-04 Annex M)
If it's not listed in Table 3.1 or Table 4.9 - It's not a code approved steel, see the last entry of Table 4.8 for the qualifying PQR info.
Another thread talks about this steel: http://www.aws.org/cgi-bin/mwf/topic_show.pl?pid=100384

Hope this helps