Hi Muhammed,
In addition to the answers provided by JRS, I attached some information and illustrations on duplex stainless steels. You may download this document from the attached link. http://www.imoa.info/_files/stainless_steel/Duplex_Stainless_Steel_2d_Edition.pdf.
The terms, Duplex, Super Duplex, Hyper Duplex are relative and are based on the more improved chemistry, improved pitting and corrosion resistances of this group of alloys. As the alloy composition are enriched and are better engineered, the alloy get more suited to withstand more aggressive and sever service environments. The above terms are more coined by the manufacturers.
I hope that the attached documents will clarify your doubts very much.
Thanks.
From: sifuentes26@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:4602] Duplex & Superduplex
Date: Wed, 24 Mar 2010 02:51:00 -0500
Hello Muhammed:
You can run chemical test for chromium and nickel contents DSS 2205, and SDSS 2507. the first two numbers indicate: % Cr, and the second two numbers indicate: % Ni. You can check the attachments to find answer to your questions.
Regards
JRS
Date: Wed, 24 Mar 2010 09:43:00 +0400
Subject: [MW:4601] Duplex & Superduplex
From: ibratech@gmail.com
To: materials-welding@googlegroups.com
Hi friends,
How can we identify duplex and super duplex stainless steel?. Both are P10H.
What are the common electrodes for Duplex and super duplex?.
Thanks & Regards
Muhammed Ibrahim PK
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