ASTM E340 -13 Test method for Macroetching Metals and Alloys

ASTM E 340-13 is a test method which involves Macroetching process and it is used to determine the heterogeneity of metals and alloys. Metallography and other chemical test will provide only information about specific localities but can’t give data about different places unless an inordinate number of specimens are taken

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Scope:

These test procedures describe the methods of macroetching metals and alloys to reveal their macrostructure.

Test Procedure:

Table 1: These test procedures describe the methods of macroetchingv metals and alloys to reveal their macrostructure

Test Specimen:

Test Specimen should be a disk with smooth surface and there should be a minimum amount of cold work is done.

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