Super duplex hollow bars 25Cr Tubing 80KSI OCTG
25Cr Tubing can be Solution-annealed or Cold-hardened produed into 80ksi,110ksi,125ksi and 140ksi yield strength as per the ANSI/API SPECIFICATION 5CRA Standard.
Super duplex and duplex stainless steels both have the same three metals in common, these metals are present at different levels. Duplex consists of 22% chromium, 5-6% nickel and 3% molybdenum. Super duplex, meanwhile, contains 25% chromium, 5.5~7.5% nickel and 3~4% molybdenum. The higher levels of these elements is what gives super duplex its enhanced resistance to corrosion against duplex stainless steel.
Super duplex steel, largely due to its higher nickel content, is more expensive than duplex stainless steel. Super duplex, however, can withstand corrosive environments such as those found in marine or petrochemical industries for a longer time than duplex and is higher in strength.
