ASTM G139-05

    Standard Test Method for Determining Stress-Corrosion Cracking Resistance of Heat-Treatable Aluminum Alloy Products Using Breaking Load Method

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    1. Scope

    1.1 This test method covers procedures for evaluation of stress corrosion cracking (SCC) resistance by the breaking load test method, a concept which uses residual strength as the measure of damage evolution (in this case environmentally assisted cracking).

    1.2 This test method covers specimen type and replication, test environment, stress levels, exposure periods, final strength determination, and statistical analysis of the raw residual strength data.

    1.3 The test method was developed for use with heat-treatable aluminum alloys, that is, 2XXX alloys and 7XXX with 1.2 to 3.0 % Cu, and test specimens oriented in the short-transverse direction relative to grain structure (, ). However, the residual strength measurements and the statistics used to analyze the data are not specific to heat-treatable aluminum alloys and can be used for other specimen orientations and different types of materials.

    This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    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

    E8 Test Methods for Tension Testing of Metallic Materials

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    G44 Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5 % Sodium Chloride Solution

    G47 Test Method for Determining Susceptibility to Stress-Corrosion Cracking of 2XXX and 7XXX Aluminum Alloy Products

    G49 Practice for Preparation and Use of Direct Tension Stress-Corrosion Test Specimens

    G64 Classification of Resistance to Stress-Corrosion Cracking of Heat-Treatable Aluminum Alloys


    ICS Code

    ICS Number Code 77.040.10 (Mechanical testing of metals); 77.150.10 (Aluminium products)

    UNSPSC Code

    UNSPSC Code 11101711(Non ferrous alloy)


    DOI: 10.1520/G0139-05

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