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  • ASTM A376 TP321 Seamless Steel Pipe
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    ASTM A376 TP321 Austenitic Steel Pipe
    ASTM A376 TP321 Seamless Austenitic Steel Pipe
    Standard Specification for
    Seamless Austenitic Steel Pipe for High-Temperature Service
    ASTM A376 TP321 Steel Pipe covers seamless austenitic steel pipe intended for high-temperature service. 
    ASTM A376 TP321 Seamless Austenitic Steel Pipe was originally developed for use for piping in the central stations of electric-power generating thermal plants. However, its use is not restricted to such applications and it may be used in other applications for which the attributes ofthe materials
    ASTM A376 TP321 Steel Pipe have lower strength requirements for nominal wall thicknesses greater than 3 ⁄ 8 in. [9.5mm].

    ASTM A376 TP321 Austenitic Steel Pipe Quick Details
    Company Name: Beite steel pipe
    Country/Region: China
    Product Name:ASTM A376 TP321 Austenitic Steel Pipe
    Manufacture:seamless or welded process,
    Outside Diameter:12.7mm——127mm
    Wall thickness:0.9mm——12.7mm
    Length:6000mm、12000m or specified length as require
    Port of Shipment:Tianjin,China
    Payment:L/C or T/T
    Delivery: 7-15 days after payment
    Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden)
    Materials and Manufacture
    Manufacture—pipe may be either hot finished or cold finished, with a suitable finishing treatment, where necessary.
    Heat Treatment:
    All pipe shall be furnished in the heat-treated condition ,each pipe shall be stenciled “HT-O.”
    ASTM A376 TP321 Seamless Austenitic Steel Pipe,heat treatment shall consist of heating to a minimum temperature of 1900 °F [1040 °C] and quenching in water or rapidly cooling by other means.
    A solution annealing temperature above 1950 °F [1065°C] may impair the resistance to intergranular corrosion after subsequent exposure to sensitizing conditions in ASTM A376 TP321 Seamless Austenitic Steel Pipe
    Chemical Composition

    Grade UNS
    Composition, % A
    Carbon Manganese Phosphorus Sulfur Silicon Nickel Chromium Titanium
    TP321 S32100 0.08 2.00 0.045 0.030 0.75 9.0–13.0 17.0–19.0 B

    B: The titanium content shall be not less than five times the carbon content and not more than 0.70 %.

    Mechanical Properties
    Grade Tensile A strength,
    min, ksi [MPa]
    Yield strength
    Elongation in 2 in. or 50 mm (or 4D) min, %
    Longitudinal Transverse
    ≤0.375 in.
    [9.50 mm]
    75[515] 30[205] 35 25
    >0.375 in.
    [9.50 mm] 
    70[480] 25[170] 35 25

    Hydrostatic or Nondestructive Electric Test
    Each pipe shall be subjected to the Nondestructive Electric Test or the Hydrostatic Test. Unless specified by the purchaser, either test may be used at the option ofthe producer.
    Hydrostatic Test—Each length of finished pipe shall be subjected to the hydrostatic test in accordance with Specification A999/A999M, 

    Mechanical Tests Required
    Transverse or Longitudinal Tension Test
    Flattening Test

    Surface Condition:
    All pipe surfaces shall be free of scale, dirt, grease, paint,or other foreign material that could interfere with interpretation oftest results. The methods used for cleaning and preparing the surfaces for examination shall not be detrimental to the base metal or the surface finish.


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