Introduction
S31050 material No is 1.4466, And Designation is X1CrNiMoN25-22-2,The trade name is 310MoLN/253MA, The mainly chemical alloy material is Chromium not less 24%,Nickel not less 21% and Molybdenum not less 2%,these alloy composition make the material have excellent corrosion resistance in high Acid and alkalinity environment. And popular in Super heat spare parts production.
Chemical components
Element  | Content (%)  | 
Iron, Fe  | Balance  | 
Chromium, Cr  | 24-26  | 
Nickel, Ni  | 21-23  | 
Molybdenum, Mo  | 2-2.50  | 
Manganese, Mn  | ≤ 2  | 
Nitrogen, N  | 0.10-0.16  | 
Silicon, Si  | ≤ 0.70  | 
Phosphorous, P  | 0.025  | 
Carbon, C  | ≤ 0.020  | 
Sulfur, S  | ≤ 0.010  | 
Mechanical properties
properties  | Metric  | Imperial  | 
Tensile strength  | 540-740 MPa  | 78320- 107327 psi  | 
Proof strength  | 250 MPa  | 36259 psi  | 
Modulus of elasticity (20°C)  | 195 GPa  | 28282 ksi  | 
Elongation at break (In 2", 50% cold worked)  | 40%  | 40%  | 
Hardness, Brinell  | 95  | 95  | 
Available standard and products.
ASTM A182 For Forged or Rolled Alloy and Stainless Steel Pipe Flanges,Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A240 for Chromium and Chromium-Nickel Stainless Sheet, and Strip for Pressure Vessels
ASTM A213 for seamless boiler, superheater, and heat-exchanger tubes
ASTM 276 for stainless steel bar and shapes
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