ASTM A729/A729M-09

    Standard Specification for Alloy Steel Axles, Heat-Treated, for Mass Transit and Electric Railway Service

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    1. Scope

    1.1 This specification covers heat-treated alloy steel axles for mass transit and commuter cars in electric and locomotive hauled railway service.

    1.2 This specification is for solid design roller bearing axles with machined bodies.

    1.3 Various axle designs are used for this service including motor and non-motor with either inboard or outboard journals.

    1.4 Supplementary requirements including those in the general requirements of Specification A 788/A 788M are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

    1.5 Unless the order specifies the applicable M specification designation, the axles shall be furnished to the inch-pound units.

    1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.

    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

    A29/A29M Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought

    A275/A275M Practice for Magnetic Particle Examination of Steel Forgings

    A388/A388M Practice for Ultrasonic Examination of Steel Forgings

    A788/A788M Specification for Steel Forgings, General Requirements

    E112 Test Methods for Determining Average Grain Size

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

    E1426 Test Method for Determining the X-Ray Elastic Constants for Use in the Measurement of Residual Stress Using X-Ray Diffraction Techniques

    Other Standard

    AAR Manual of Standards and Recommended Practices

    ICS Code

    ICS Number Code 45.040 (Materials and components for railway engineering)

    UNSPSC Code

    UNSPSC Code 25173800(Drivetrain systems); 25173801(Driving axles)

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

    DOI: 10.1520/A0729_A0729M-09

    Citation Format

    ASTM A729 / A729M-09, Standard Specification for Alloy Steel Axles, Heat-Treated, for Mass Transit and Electric Railway Service, ASTM International, West Conshohocken, PA, 2009,

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