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  • ASTM
    B849-94 Standard Specification for Pre-Treatments of Iron or Steel for Reducing Risk of Hydrogen Embrittlement
    Edition: 1994
    $91.10
    Unlimited Users per year

Description of ASTM-B849 1994

ASTM B849-94

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




ASTM B849

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.


Keywords

Autocatalytic plating; Chemical conversion coatings; Coatings-conversion; Cracking-stress-cracking; Degradation-metals/alloys; Delayed brittle failure; Electroplating; Heat treatment; Hydrogen embrittlement; Hydrogen stress cracking; Iron; Porcelain enameling; Pre-treatments of iron/steel; Steel; Stress relief; pre-coating treatment-iron/steel, for reducing risk of hydrogen; embrittlement, spec


ICS Code

ICS Number Code 77.080.01 (Ferrous metals in general)


DOI: 10.1520/B0849-94

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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