If you are working with the ASME Code, and your materials share the same number P, then you can use the same WPS, in fact that's the reason for the existence of p and not have as many WPS, the P numbers grouped materials metallurgically they are similar.
2015-08-01 7:13 GMT-05:00 sarfraz ahmad <sarfrazengineer@gmail.com>:
Previously the selected material for tanks construction was SA-516 Gr. 70 but to unavailability of selected material in the market, a comparison was made b/w chemical composition and mechanical properties of easily available material i.e. S355J2 and selected for construction instead of SA-516 Gr. 70. Now the question is that we have PQR for SA-516 Gr. 70 and the referenced WPS is listed with new material i.e. S355J2. can we use use these WPS and PQR?--
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