ASME IX Group No. Question.

By Nweldingjg Date 10-26-2016 12:59

90% of the work we complete requires impact testing on the product, so all of our WPS's have impact testing completed.
I have already read ASME IX QW 401.1 and QW 403.5 and i cannot interpret what the requirement is.

I have a WPS that is (ASTM A633 Gr C) P1 Group 2 to P1 Group 2.
I have an order that is (ASTM A572 Gr 50) P1 Group 1 to P1 Group 1.
The welding process that will be completed is FCAW.

Can i complete the order using the WPS for P1 Group 2, please elaborate and show evidence in ASME IX?

By 803056

Date 10-26-2016 17:15

If your WPS does not include both Groups 1 and 2, the answer is no, one cannot weld anything not listed by the WPS.

Al

By Bill M

Date 11-02-2016 19:33

I have a question since I have a really really old copy of ASME IX...
I assume you welded the original PQR with ASTM A633?

Is ASTM A633 a P-1 number material, or is it really an S-1, group 1 material?
Is ASTM A572 Gr50 a P-1 number material, or is it really an S-1, group 1 material?

If you welded the PQR with ASTM A633 Grade C, "S-1 Group 1 material" (assume grade C 65ksi min tensile)...

According to QW420, Welding Procedure Qualification with a base metal in one-S number grouping, qualifies for all other base materials in that same S number grouping.

If that works you will need a new WPS written for welding the ASTM 572 Gr50 against the original supporting PQR

However, IF you welded the original PQR with ASTM A633 Grade C and it was a 70ksi min tensile material, then you actually welded the PQR with a S-1, group 2 material, then the PQR will not support the new WPS.

There are two Grade C's listed for ASTM A633. 65ksi and 70ksi min tensile. 65ksi = group 1, 70ksi = group 2.