Unlisted Steel in Table 4.8 aws d1.1

By JP

Date 05-15-2017 08:14

Dear All,

Can anyone explain the " Specific Combination of Steel " , Do we can write S275 to S275 in WPS or S275JR to S275JR ,means if we use J0/J2 material for welding , we need to re qualify the PQR ??

By 803056

Date 05-15-2017 11:41

One must qualify the WPS (per AWS D1.1 Structural Welding Code) that is used to weld an unlisted base metal to itself, to another unlisted base metal, or to a listed base metal. The qualified WPS is only valid for the the specific base metal specifications and grades used to qualify the WPS.

Example:
B.M. ABC welded to ASTM A572 Gr 50; since ABC is an unlisted B.M., the WPS is only qualified and valid for that specific combination, i.e., B.M. ABC to ASTM A572 Gr 50.

This is different than a WPS that is qualified using two listed base metal specifications where the WPS is generally qualified for the base metals included in the grouping.

Best regards - Al