ASTM A 561 Standard Practice for Macroetch Testing of Tool Steel Bars

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ASTM A 561 Document Information:

Title
Standard Practice for Macroetch Testing of Tool Steel Bars

ASTM International

Publication Date:
Oct 25, 1971

Scope:

This 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 10× is occasionally employed.

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