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Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:
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ASTM G139 covers the 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. This method was developed for the use with heat treatable aluminum alloys, 2XXX and 7XXX with 1.2 to 3.0% Cu, and the test specimens oriented in the short-transverse direction relative to grain size.
ASTM G139 describes a procedure for using residual strength after exposure to a corrosive environment to evaluate stress corrosion cracking susceptibility in heat treatable aluminum alloy products. These products, generally sheet, plate, extrusions, forgings and bar, are most susceptible to SCC in the long transverse direction of the sheet, short transverse direction of the plate, extrusions and forgings, and the transverse direction of the rod and bar stock. Tensile bars or tensile sheet specimens are prepared according to ASTM G49, exposed to a corrosive solution, and then tensile tested to determine the amount of corrosion damage that occurred.
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Reference: ASTM G139 – Standard Test Method for Determining Stress-Corrosion Cracking Resistance of Heat-Treatable Aluminum Alloy Products Using Breaking Load Method