ATI 2003(R) (UNS S32003) lean duplex stainless steel (LDSS) is a
molybdenum-enhanced, proprietary duplex stainless alloy. ATI 2003 LDSS
(20% Cr, 3% Ni, 2% Mo) provides enhanced strength and corrosion
resistance and can be an economic alternative to Type 316L (17% Cr, 10%
Ni, 2% Mo) stainless. With a Pitting Resistance Equivalency number
(PREn) of 30, ATI 2003 lean duplex is a more corrosion resistant, higher
strength, and cost effective material for consideration on new platforms
having a 40-year design life in the harsh North Sea environment. The
calculated PREn value is a popular means of ranking stainless steels for
their anticipated resistance to corrosion pitting in aqueous
environments. Since 2006, ATI 2003 LDSS has been approved to NORSOK
Standard M-650. The NORSOK standards are developed by the Norwegian
petroleum industry with broad petroleum industry participation, to
ensure adequate safety, value adding and cost effectiveness for
petroleum industry developments and operations. For more information on
ATI 2003 LDSS, visit http://www.atimetals.com/">www.atimetals.com.