Standard Test Method for Mercurous Nitrate Test for Copper and Copper Alloys
|Publication Date:||22 September 1958|
|ICS Code (Copper and copper alloys):||77.120.30|
This method describes the technique for conducting the mercurous nitrate test of commercial wrought copper and cast or wrought copper-base alloy products. This is an accelerated test for the purpose of detecting in copper or copper-base alloy products the presence of residual (internal) stresses that might bring about failure of the material in service or storage through stress-corrosion cracking. This method is intended to cover the mercurous nitrate test of certain copper-alloy products supplied in accordance with ASTM specifications prepared by Committee B-5.
NOTE: 1.-While this method has also been used for testing assemblies and partial assemblies, the method was not written with that intent and some modification may be required for such use.
NOTE: 2.-The following definitions are included for information:
Stress Corrosion Crack.-Spontaneous failure of metals by cracking under combined action of corrosion and stress, residual or applied.
Applied Stress.-Stresses that are set up and exist in a body during application of an external load.
Residual Stress.-Stresses that remain within a body as the result of plastic deformation or casting.
NOTE: 3.-For any particular copper alloy, reference should be made to the material specification.