ASTM A213/A213M-11a

    Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes


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    1. Scope

    1.1 This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T5, TP304, etc. These steels are listed in Tables 1 and 2.

    1.2 Grades containing the letter, H, in their designation, have requirements different from those of similar grades not containing the letter, H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements.

    1.3 The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness or, if specified in the order, average wall thickness. Tubing having other diameters may be furnished, provided such tubes comply with all other requirements of this specification.

    1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

    TABLE 1 Chemical Composition Limits, %A, for Low Alloy Steel

    GradeUNS DesignationComposition, %
    Carbon Manga-
    nese
    Phospho-
    rus
    Sul-
    fur
    Silicon
    NickelChromiumMolybdenumVana-
    dium
    BoronNiobiumNitrogenAluminumTungstenOther Elements
    T2K115470.100.20 0.300.610.025 0.025B 0.100.30...0.500.810.440.65 .....................
    T5K41545 0.150.300.600.025 0.0250.50 ...4.006.000.450.65.....................
    T5bK51545 0.150.300.600.025 0.0251.002.00...4.006.000.450.65.....................
    T5cK41245 0.120.300.600.025 0.0250.50 ...4.006.000.450.65..................Ti 4xC0.70
    T9K90941 0.150.300.600.025 0.0250.251.00...8.0010.000.901.10.....................
    T11K11597 0.050.15 0.300.600.025 0.0250.501.00... 1.001.500.440.65.....................
    T12K115620.050.150.300.61 0.025 0.025B0.50 ... 0.801.250.440.65 .....................
    T17K12047 0.150.25 0.300.610.025 0.0250.150.35... 0.801.25...0.15..................
    T21K31545 0.050.15 0.300.600.025 0.0250.501.00... 2.653.350.801.06.....................
    T22K21590 0.050.15 0.300.600.025 0.025 0.50... 1.902.600.871.13.....................
    T23K407120.040.100.100.600.0300.0100.50 0.40 1.902.600.050.300.200.300.0010
    0.006
    0.020.080.0150.0301.451.75Ti 0.0050.060
    Ti/N 3.5C
    T24K307360.050.100.300.700.0200.0100.150.45...2.202.600.901.100.200.300.0015
    0.007
    ...0.0120.02...Ti 0.060.10
    T36K210010.100.170.801.200.0300.0250.250.501.001.300.300.250.500.02...0.0150.0450.020.050...Cu 0.500.80
    T91 K909010.070.140.300.60 0.020 0.010 0.200.50 0.40 8.09.50.851.050.180.25 ...0.060.100.030
    0.070
    0.02...Ti 0.01
    Zr 0.01
    T92 K92460 0.070.13 0.300.60 0.020 0.010 0.500.40 8.59.5 0.300.600.150.25 0.001
    0.006
    0.040.090.030
    0.070
    0.021.52.00Ti 0.01
    Zr 0.01
    T122K912710.070.140.700.0200.0100.50 0.5010.011.50.250.600.150.300.0005
    0.005
    0.040.100.040
    0.100
    0.021.502.50Cu 0.301.70
    Ti 0.01
    Zr 0.01
    T911K910610.090.130.300.600.0200.0100.100.500.408.59.50.901.100.180.250.0003
    0.006
    0.060.100.040
    0.090
    0.020.901.10Ti 0.01
    Zr 0.01

    A Maximum, unless range or minimum is indicated. Where ellipses (...) appear in this table, there is no requirement, and analysis for the element need not be determined or reported.

    B It is permissible to order T2 and T12 with a sulfur content of 0.045 max. See 16.3.

    C Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

    A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys

    A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes

    E112 Test Methods for Determining Average Grain Size


    ICS Code

    ICS Number Code 23.040.10 (Iron and steel pipes)

    UNSPSC Code

    UNSPSC Code 40102000(Boilers); 40101802(Heat exchangers)


    Referencing This Standard

    DOI: 10.1520/A0213_A0213M-11A

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM A213 / A213M-11a, Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes, ASTM International, West Conshohocken, PA, 2011, www.astm.org

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