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    ASTM A369 / A369M - 11

    Standard Specification for Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service

    Active Standard ASTM A369 / A369M | Developed by Subcommittee: A01.10

    Book of Standards Volume: 01.01

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    This guide specifies standard specification for heavy-wall carbon and alloy steel pipe made from turned and bored forgings and is intended for high-temperature service. Heat and product analysis shall be conducted on several grades of ferritic steels, wherein the material shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum. The steel pipe shall conform to the required tensile properties like tensile strength, yield strength, and elongation. Required mechanical tests for the steel pipe include transverse or longitudinal tension test, flattening test, and bend test.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers heavy-wall carbon and alloy steel pipe (Note 1) made from turned and bored forgings and is intended for high-temperature service. Pipe ordered under this specification shall be suitable for bending and other forming operations and for fusion welding. Selection will depend on design, service conditions, mechanical properties and high-temperature characteristics.

    Note 1—The use of the word pipe throughout the several sections of this specification is used in the broad sense and intended to mean pipe headers, or leads.

    Note 2—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size.

    1.2 Several grades of ferritic steels are covered. Their compositions are given in Table 1.

    1.3 Supplementary requirements (S1 to S6) of an optional nature are provided. These supplementary requirements call for additional tests to be made, and when desired shall be so stated in the order, together with the number of such tests required.

    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 Requirements

    GradeComposition, %
    Carbon0.25 max0.30 max
    Phosphorus, max0.0350.0350.0250.025
    Sulfur, max0.0350.035 0.0250.025
    Silicon0.10 min0.10 min0.100.500.100.30
    Molybdenum...... 0.440.650.440.65
    Grade FP5FP9FP11FP12
    Carbon0.15 max0.15 max
    Phosphorus, max0.0250.0300.0250.025
    Sulfur, max0.0250.030 0.0250.025
    Silicon0.50 max0.501.000.501.000.50 max
    Molybdenum0.450.650.901.10 0.440.650.440.65
    Manganese0.300.60 0.300.600.300.600.300.60
    Phosphorus, max0.025 0.0250.0250.020
    Sulfur, max0.0250.0250.0250.010
    Silicon0.50 max0.50 max0.200.500.50 max
    Chromium2.653.35 1.902.608.009.508.509.50
    Molybdenum0.801.06 0.871.130.851.050.300.60
    Others: W 1.502.00
    Ni 0.40 max V 0.150.25
    V 0.180.25 Cb 0.040.09
    Cb 0.060.10 N 0.0300.070
    N 0.030.07 Ni 0.40 max
    Al 0.02 max Al 0.02 max
    Ti 0.01 maxTi 0.01 max
    Zr 0.01 maxZr 0.01 max
    B 0.0010.006

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

    ANSI Standard

    B46.1 Surface Texture

    ASTM Standards

    A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe

    E290 Test Methods for Bend Testing of Material for Ductility

    E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

    ASME Boiler and Pressure Vessel Code

    Section 1X Welding Qualifications

    AWS Specifications

    A5.29/A5.29M Low-Alloy Steel Electrodes for Flux Cored Arc Welding

    ICS Code

    ICS Number Code 23.040.10 (Iron and steel pipes)

    UNSPSC Code

    UNSPSC Code 40170000(Pipe piping and pipe fittings)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/A0369_A0369M-11

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    Citation Format

    ASTM A369 / A369M-11, Standard Specification for Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service, ASTM International, West Conshohocken, PA, 2011,

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