This guide covers the standard procedure of performing post-coating heat treatment of some steels for reducing susceptibility to hydrogen embrittlement or degradation that may arise in the finishing processes. This heat treatment procedure shall be used after plating operations but prior to any secondary conversion coating operation. Except for surface-hardened and shot-peened parts, the choice of embrittlement-relief heat treatment and the corresponding treatment conditions shall be selected on the basis of actual tensile strength of the steel.
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1.1 This guide covers procedures for reducing the susceptibility in some steels to hydrogen embrittlement or degradation that may arise in the finishing processes.
1.2 The heat treatment procedures established herein may be effective for reducing susceptibility to hydrogen embrittlement. This heat-treatment procedure shall be used after plating operations but prior to any secondary conversion coating operation.
1.3 This guide has been coordinated with ISO/DIS 9588 and is technically equivalent.
Note 1—The heat treatment does not guarantee complete freedom from the adverse effects of hydrogen degradation.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
A919 Terminology Relating to Heat Treatment of Metals
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
delayed brittle failure; heat treatment; hydrogen embrittlement; hydrogen embrittlement relief; hydrogen induced cracking; hydrogen stress cracking; post-treatments of steel; Autocatalytic plating; Chemical conversion coatings; Conversion coatings; Degradation--metals/alloys; Delayed brittle failure; Electroplating; Heat treatment--metals/alloys; Hydrogen embrittlement (HE); Hydrogen stress cracking; Iron; Porcelain enamel products; Post-coating treatment of iron/steel; Steel; Stress cracking tests; Stress relief;
ICS Number Code 77.080.01 (Ferrous metals in general)
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