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Last Updated: Aug 16, 2017
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ASTM A561-71(1999)
Standard Recommended Practice for Macrotech Testing of Tool Steel Bars
Standard Recommended Practice for Macrotech Testing of Tool Steel Bars
A0561-71R99
ASTM|A0561-71R99|en-US
Standard Recommended Practice for Macrotech Testing of Tool Steel Bars
Standard
A561 Standard Recommended Practice for Macrotech Testing of Tool Steel Bars>
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BOS Vol. 01.05 Committee A01
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Scope
1.1 This recommended practice for macroetch testing has been found to be a useful and reliable method for evaluating the quality of tool steel bars. It is used as a quality control and inspection test to reveal by deep acid etching the macrostructure in specimens cut from bars and to show the presence of such conditions as pipe, cracks, porosity, segregation, or foreign material. The etched surface is generally examined visually, but magnification up to about 10X is occasionally employed.