[MW:32525] RE: PQR-Qualified in Duplex Stainless Steel UNS-31803 / WPS-UNS-32750

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.

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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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