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Article | REF: M95 V1

Quantitative metallography

Author: Thomas MUNCH

Publication date: September 10, 2024

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2. Measurement in the plane

2.1 Standards

The main standards for measuring grain size in metal alloys are ISO 643 and ASTM E112-24, the latter being specific to the USA. ISO 14250 is used to quantify the size of a duplex grain, while ISO 4967 is designed to identify and quantify inclusions.

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2.1.1 Grain size measurement of metal alloys

The grains are single crystals of metal alloys: this excludes, in principle, the eutectoid or eutectic zones of the alloys, although the term "pearlite grain" is commonly used.

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