ASTM B849-02(2007)

    Standard Specification for Pre-Treatments of Iron or Steel for Reducing Risk of Hydrogen Embrittlement

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    1. Scope

    1.1 This specification covers procedures for reducing the susceptibility or degree of susceptibility to hydrogen embrittlement or degradation that may arise in electroplating, autocatalytic plating, porcelain enameling, chemical conversion coating, and phosphating and the associated pretreatment processes. This specification is applicable to those steels whose properties are not affected adversely by baking at 190 to 230°C or higher (see 6.1.1).

    1.2 The heat treatment procedures established herein have been shown to be effective for reducing the susceptibility of steel parts of tensile strength 1000 MPa or greater that have been machined, ground, cold-formed, or cold-straightened subsequent to heat treatment. This heat-treatment procedure is used prior to any operation capable of hydrogen charging the parts, such as the cleaning procedures prior to electroplating, autocatalytic plating, porcelain enameling, and other chemical coating operations. Note 1 - 1 MPa = 145.1 psi.

    1.3 This specification has been coordinated with ISO/DIS 9587 and is technically equivalent.

    1.4 The values stated in SI units are to be regarded as 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

    A919 Terminology Relating to Heat Treatment of Metals

    B242 Guide for Preparation of High-Carbon Steel for Electroplating

    B322 Guide for Cleaning Metals Prior to Electroplating

    B374 Terminology Relating to Electroplating

    B851 Specification for Automated Controlled Shot Peening of Metallic Articles Prior to Nickel, Autocatalytic Nickel, or Chromium Plating, or as Final Finish

    ISO Standards

    ISO2080 Electroplating and Related Processes--Vocabulary Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

    ISO/DIS9587 Pre-Treatments of Iron or Steel for Reducing the Risk of Hydrogen Embrittlement

    Federal Standard

    QQ-C-320 Chromium Plating (Electrodeposited) Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.


    ICS Code

    ICS Number Code 77.080.01 (Ferrous metals in general)

    UNSPSC Code

    UNSPSC Code 11101713(Iron); 11101704(Steel)


    DOI: 10.1520/B0849-02R07

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