ASTM B557 tension test of cast aluminum magnesium test methods cover the tension testing of wrought and cast aluminum- and magnesium-alloy products, except aluminum foil, and are derived from test methods ASTM E8, which cover the tension testing of all metallic materials. ASTM B557 provides information on the strength and ductility of materials under uniaxial tensile stresses.

The ASTM B557 information may be useful in comparisons of materials, alloy development, quality control, and design under certain circumstances. The results of ASTM B557 tension tests of specimens machined to standardized dimensions from selected portions of a part or material may represent the strength and ductility properties of the entire end product or its in-service behavior in different environments. The ASTM B557 test methods are considered satisfactory for acceptance testing of commercial shipments and have been used extensively in the trade for this purpose. ASTM B557 may be accompanied by ASTM B557M for a complete metric companion. A complete metric companion to the ASTM B557 standard has been developed.

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