MECHANICAL TESTING LABORATORY

Due to the very large number of tests offered, descriptions of those most commonly requested have been gathered into the following groups:

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

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Stress-Corrosion behavior is an important characteristic to be considered when optimizing the choice of material for an engineering structure. ASTM G64 covers the alphabetical ratings of the relative resistance to stress-corrosion cracking (SCC) of numerous mill product forms of the wrought 2XXX, 6XXX, and 7XXX series heat-treated aluminum alloys and the procedure for determining the ratings.

These ratings are intended only to provide a qualitative guide for materials selection. Stress-corrosion tests are performed on at least 10 random lots. The highest rating is assigned for which the test results show 90% conformance at the 95% confidence level when tested at the specified stresses and exposure times.

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Reference: Standard Classification of Resistance to Stress-Corrosion Cracking of Heat-Treatable Aluminum Alloys