No, in most of the cases.
32750 is a SDSS(25Cr), while 31803 is a DSS(22Cr). For P10H group every grade is different, in chemistry, mechanical properties & corrosion resistance. You require separate PQR with all comprehensive testing for each individual grade.
What're the process requirements and intended service/s.
Thanks.
Pradip Goswami.P.Eng, IWE.
Independent Welding & Metallurgical Engineering Specialist
Consultant: SNC Lavalin Inc. (Nuclear &Non-Nuclear)
Saudi Aramco Approved Designated Project Welding Engineer (DPWR)
Qatar Petroleum Approved, SME-Materials & Corrosion Engineering.
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
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From: Muhammad Azeem <azeem7999@gmail.com>
Sent: September 26, 2021 4:08 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: PQR-Qualified in Duplex Stainless Steel UNS-31803 / WPS-UNS-32750
Gents,
I need your kind reference comments to clarify regarding the separate WPS required for each UNS in P-10H qualification ..
If PQR qualified with UNS-31803 Duplex Stainless Steel.
WPS can be prepared with UNS-32750 Super Duplex Stainless ...
Regards,
Muhammad Azeem Iqbal
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