Super Duplex Steel is refers to duplex steel containing PREN > 40, containing 25%Cr and molybdenum (> 3.5%) and high nitrogen (0.220.30%). The main grade are UNS S32550 (UR52N), S32750 (SAF 2507) and S32760 (Zeron 100).
The three steels grade are similar in composition, but differ in the amount of tungsten and copper.
Main type:Super Duplex Steel pipe ,bar,Plate,coil and fittings.
Standard:ASTM A213, A269, A312, A270, A789, A790, A376, EN 10216-5, EN 10297,DIN 17456, DIN
17458,JISG3459, JIS GS3463, GS3467, JIS G3448, GOST 9940, GOST 9941,
Size:1/2 "to 36" (DN15-DN900)
Pipe end: Beveled or plain end, square cut, burr free ,Plastic Cap at Both ends.
Finish: Annealed & pickled, bright annealing, polished
1.Molybdenum - containing duplex stainless steel has good resistance to chloride stress corrosion under low stress
2.Molybdenum - containing duplex stainless steel has good resistance to chloride stress corrosion and pore corrosion under low stress
3.Good comprehensive mechanical properties. Have higher strength and fatigue strength.
4.Excellent weld ability, small hot crack tendency, generally do not need preheating before welding, do not need heat treatment after welding.
Super Duplex Steel main used for Petroleum and natural gas industrial equipment,offshore platforms, heat exchange,underwater equipment and fire fighting equipment,Chemical processing industry, utensils and plumbing industry; desalting plants and submarine pipeline Mechanical parts (high strength, corrosion resistant parts), energy industry FGD system, industrial washing system, absorption tower.
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