Duplex stainless steel pipe always applied in harsh environment, like low temperature, high temperature and corrosion situation, 2205 is most common duplex stainless steel for pipes and tubes, high strength and excellent corrosion resistance to match applications.
Duplex Stainless Steels are characterized by Austenitic stainless steels and Ferritic stainless steels, high chromium (18–30%) and molybdenum (up to 5%) and lower nickel contents (3% – 10%) than Austenitic stainless steels, there are Lean Duplex, Standard Duplex, Super Duplex, Hyper Duplex.
Duplex stainless steel pipe have many advantages compared with other stainless steels pipe, so they are used more and more wide for many industries, our duplex stainless steel pipe specifications include ASTM A789 and A790 for general service, both seamless and welded type, S31803, 2205 stainless steel pipe is most used.
duplex stainless steels chemical composition
|Designation||Chemical composition % by mass max unless stated|
|UNS No||AISI No / Common Name||C||Si||Mn||P||S||Cr||Mo||Ni||Others|
|S32101||LDX 2101||0.040||1.00||4.0/6.0||0.040||0.030||21.0/22.0||0.10/0.80||1.35/1.70||N 0.20/0.25; Cu 0.10/0.80|
|S32202||DX 2202||0.030||1.00||2.00||0.040||0.010||21.5/24.0||0.45||1.00/2.80||N 0.18.0.26|
|S32205||2205 UR45N||0.030||1.00||2.00||0.030||0.020||22.0/23.0||3.0/3.5||4.5/6.5||N 0.14/0.20|
|S32304||2304||0.030||1.00||2.50||0.040||0.030||21.5/24.5||0.05/0.60||3.0/5.5||N 0.05/0.20; Cu 0.05/0.60|
|S32404||Uranus 50||0.04||1.0||2.0||0.030||0.010||20.5/22.5||2.0/3.0||5.5/8.5||N 0.20; Cu 1.0/2.0|
|S32520||Uranus 52N+||0.030||0.80||1.50||0.035||0.020||24.0/26.0||3.0/4.0||5.5/8.0||N 0.20/0.35; Cu 0.50/2.00|
|S32550||Ferralium 255||0.04||1.00||1.50||0.040||0.030||24.0/27.0||2.9/3.9||4.5/6.5||N 0.10/0.25; Cu 1.50/2.50|
|S32750||2507||0.030||0.80||1.20||0.035||0.020||24.0/26.0||3.0/5.0||6.0/8.0||N 0.24/0.32; Cu 0.50|
|S32760||Zeron 100||0.030||1.00||1.00||0.030||0.010||24.0/26.0||3.0/4.0||6.0/8.0||N 0.20/0.30; Cu 0.5/1.00; W 0.50/1.00|
duplex stainless steel pipe applications
Due to duplex stainless steel excellent corrosion resistance and high strength, duplex stainless steel pipe and tube applied in many harsh environments, duplex stainless steel U bending tube and stainless steel heat exchanger tube used for refining, chemical fertilizer, paper making, petroleum, chemical industry.