ASTM A790 S31803 steel is a Ferritic Austenitic duplex grade, with high chromium and molybdenum elements, it is most wide used duplex stainless, UNS S31803 has excellent corrosion resistance, and high strength feature, generally S31803 seamless pipe is applied in corrosion and high temperature environment.
ASTM A790 Standard
ASTM A790 / A790M specification specify duplex welded and seamless steel pipe manufacturing, sizes, tolerances, testing condition, DONGSHANG stainless supply A790 standard seamless pipe with high quality, dimensional accuracy and excellent finish.
S31803 Duplex Stainless Steel
S32205 / 2205 is a alternative grade with S31803 for welded pipe, for seamless pipe, it is a little difference in chemical position. in Europe, It is DIN 1.4462.
S31803, 2205 (S32205) Chemical composition (Max, %)
|S31803||0.03||2.0||1.0||0.03||0.02||21.0 – 23.0||2.5 – 3.5||4.5 – 6.5||0.08 – 0.20|
|0.03||2.0||1.0||0.03||0.02||22.0 – 23.0||3.0 – 3.5||4.5 – 6.5||0.14 – 0.20|
S31803, 2205 (S32205) properties
|Tensile strength (Mpa) Min||Yield strength (Mpa) Min||Elongation (%)||Hardness (HRC) max|
S31803 duplex seamless pipe
ASTM A790 standard state seamless pipe dimensions conforming to ANSI B36.19 pipe schedule chart, NPS range from to 1/8 inch to 30 inch, Sch range from 5S to XXS, other sizes pipe can be offered on request.
We supply ASTM A790 S31803 Duplex seamless pipe in various sizes, cold drawing and cold rolled manufacturing process is made to reduce outside diameter or wall thickness, annealed and pickling finishes, bright annealing finishing is available.
ASTM A790 S31803 Duplex seamless pipe is used in many applications because of duplex steel features, particular in elevated temperature environment.