ASTM A247
Standard Test Method for Evaluating the Microstructure of Graphite in Iron Castings
Analysis
cast-irongraphitenodularityclassificationunetched
Description
Test method for classifying graphite morphology in cast irons by comparison with reference micrographs. Defines graphite forms (I–VII / nodular, vermicular, flake), distribution types (A–E for flake), and nodule sizes. Required to be performed on as-polished, unetched specimens.
Standard Information
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