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Austenitic steel ASME SA312 · TP304H Featured Image
  • Austenitic steel ASME SA312 · TP304H

Austenitic steel ASME SA312 · TP304H

Short Description:

ASME SA-312 Grade TP 304H ASME SA-312/SA-312M steel pipe is a popular choice in the piping industry due to its excellent weldability, corrosion resistance and mechanical properties. It is a widely used material in various industries including oil and gas, heat exchanger, automotive and construction. The specification of the pipe includes various parameters such as material grade, pipe oil length and pipe wall thickness.


  • Pipe Grade: TP304H, AISI 304H, EN 1.4948, UNS S30409
  • Pipe Type: Seamless / Welded
  • Pipe Form: Round Pipe, Cut-to-Length Pipe
  • Surface Finish: Annealed & Pickled (AP), Bright Annealed (BA), Polished
  • Standards (ASME/ASTM): ASME SA312, ASTM A312
  • Standards (EN): EN 10216-5,EN 10217-7

    • Product Detail

    Product Tags

    TP304H Stainless Steel Pipe, 1.4948 Stainless Steel Pipe

    Item Specification / Details
    Stainless Steel Pipe ASME SA312, ASTM A312
    Pipe Size (NPS) 1/8″ NB to 30″ NB (DN6 to DN750)
    Wall Thickness / Schedule SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS
    Type Seamless, Welded (WLD), Heavy Wall Welded (EFW) (
    Form Round Pipe
    Length Single Random Length (SRL), Double Random Length (DRL), Cut Length
    End Plain End (PE), Beveled End (BE), Threaded End
    End Protection Plastic Caps
    Outside Finish AP (Annealed & Pickled), BA (Bright Annealed), Polished
    Delivery Condition Solution Annealed and Pickled
    Inspection, Test Reports Mill Test Certificates, EN 10204 3.1, Hydrostatic Test, Eddy Current Test, Radiographic Test (for Welded)
    Packing Packed in Wooden Boxes, Steel Strip Bundles, or as per Customers Requests
    Specials Custom wall thickness, non-standard diameters, and specialized testing available upon request

    TP 304H . UNS S30409 . 1.4948 Chemical Composition

    Chemical Composition (in % by mass)

    Grade C Si (Max.) Mn (Max.) P (Max.) S (Max.) Cr Ni Mo Ti N Others
    304H 0.04 – 0.10 1.00 2.00 0.045 0.030 18.0 – 20.0 8.0 – 11.0 - - - -
    1.4948 0.04 – 0.08 1.00 2.00 0.035 0.015 17.0 – 19.0 8.0 – 11.0 - - - -

    TP 304H . UNS S30409 . 1.4948 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
    304H 205 - 515 35 90 Solution Annealed (Min. 1040°C)
    1.4948 190 220 500 – 700
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