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Super austenitic steel ASME SA213 · S31254.SMO254 pipe Featured Image
  • Super austenitic steel ASME SA213 · S31254.SMO254 pipe

Super austenitic steel ASME SA213 · S31254.SMO254 pipe

Short Description:

254 SMO (UNS S31254) is an austenitic stainless steel that is compatible with other austenitic stainless steels and is designed with high levels of chromium, molybdenum, and nitrogen for maximum pitting and crevice corrosion resistance.This alloy is mainly chromium–molydenum–nickel alloy with nitrogen always as an added element; the approximate composition is: Cr 20%–22%, Mo 6%–7%, Ni 18%–20%, and nitrogen increasing its strength and corrosion resistance, particularly in chloride-bearing environments such as in seawater, working in paper, pulp, and chemical industries.


  • Tube Grade: S31254, 254 SMO, EN 1.4547, UNS S31254
  • Tube Type: Seamless
  • Tube Form: Straight, U Bend, Cut-to-Length Pieces
  • Surface Finish: Solution Annealed & Pickled (AP), Bright Annealed (BA), Polished
  • Standards (ASME/ASTM): ASME SA213, ASTM A213
  • Standards (EN): EN 10216-5

    • Product Detail

    Product Tags

    S31254 (254 SMO) Stainless Steel Tubes, 1.4547 Stainless Steel Tubes

    Item Specification / Details
    Stainless Steel Tube ASME SA213, ASTM A213
    Tube Size 1/8″ OD to 5″ OD (6.35 mm to 127 mm)
    Thickness Range 0.5 mm – 15 mm
    Type Seamless
    Form Round, U Bend
    Length Single Random, Double Random & Required Length / U Bend
    End Plain End, Beveled End
    End Protection Plastic Caps
    Outside Finish 2B, BA, AP, Polished
    Delivery Condition Solution Annealed and Pickled, Bright Annealed, Cold Drawn
    Inspection, Test Reports Mill Test Certificates, EN 10204 3.1, Eddy Current Test, Hydrostatic Test
    Packing Packed in Wooden Boxes, or as per Customers Requests
    Specials Sizes and Specifications other than above can be manufactured on request

    UNS S31254 . 254 SMO . 1.4547 Chemical Composition

    Chemical Composition (in % by mass)
    Grade C (Max.) Si (Max.) Mn (Max.) P (Max.) S (Max.) Cr Ni Mo Cu N Others
    S31254 0.020 0.80 1.00 0.030 0.010 19.5 – 20.5 17.5 – 19.5 6.00 – 6.50 0.50 – 1.00 0.18 – 0.25
    1.4547 0.020 0.70 1.00 0.030 0.010 19.5 – 20.5 17.5 – 19.5 6.00 – 7.00 0.50 – 1.00 0.18 – 0.25

    UNS S31254 . 254 SMO . 1.4547 Mechanical Property

    Mechanical Property & Heat Treatment
    Grade Rp 0.2 Mpa (Min.) Rp 1.0 Mpa (Min.) Rm Mpa (Min. – Max.) A (%) (Min.) Hardness (HRB) (Max.) Heat Treatment
    S31254 300 650 35 96 Solution Annealed (Min. 1150°C)
    1.4547 300 340 650 – 850 35 Solution Annealed
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