Dear All,
We have 2 WPS need to be qualified in conformity with AWS : welding SS540 ( JIS standard, CS , same group with SS400) to SS304 (spec SA-240, stainless steel ) ; welding SS540 to SS321 ( spec SA-240). SS321 is same group B with SS304 (AWS D1.6) . So can we consider to qualify only one WPS and from this PQR, can we issue that WPS ?
And we had qualified WPS with PQR already ( SS400 to SS304 ). From this PQR, can we issue two above WPSs ? Tensile strength of SS540 is nearly double of SS400.