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Austenitic steel ASME SA213 · TP347

Short Description:

Tp347 is an austenitic stainless steel stabilized with columbium. The addition of columbium makes this stainless grade perfect performance at high oxidation condition under high temperatures at around 800 degrees Celsius

TP347H (UNS S3409) is the stainless steel grade of TP347 with a higher carbon content(0.04 – 0.10)

347H has good resistance to intergranular corrosion, and has good corrosion resistance in alkali, seawater and a variety of acid solutions. Due to its good heat resistance and oxidation resistance, it can withstand small loads at temperatures below 850 degrees.


  • Tube Grade: TP347, AISI 347, EN 1.4550, UNS S34700
  • 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

    TP347 Stainless Steel Tubes, 1.4550 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

    TP 347 . UNS S34700 . 1.4550 Chemical Composition

    Chemical Composition (in % by mass)

    Grade C (Max.) Si (Max.) Mn (Max.) P (Max.) S (Max.) Cr Ni Mo Nb (Cb) N Others
    347 0.08 0.75 2.00 0.045 0.030 17.0 – 19.0 9.0 – 13.0 10xC – 1.10
    1.4550 0.08 1.00 2.00 0.045 0.015 17.0 – 19.0 9.0 – 12.0 10xC – 1.00

    TP 347 . UNS S34700 . 1.4550 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
    347 205 515 35 90 Solution Annealed
    1.4550 190 220 500 – 750 30 Solution Annealed
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