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Homepage>BS Standards>77 METALLURGY>77.040 Testing of metals>77.040.99 Other methods of testing of metals>BS EN ISO 643:2020 Steels. Micrographic determination of the apparent grain size
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immediate downloadReleased: 2020-05-05
BS EN ISO 643:2020 Steels. Micrographic determination of the apparent grain size

BS EN ISO 643:2020

Steels. Micrographic determination of the apparent grain size

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Standard number:BS EN ISO 643:2020
Pages:28
Released:2020-05-05
ISBN:978 0 539 13719 4
Status:Corrigendum
DESCRIPTION

BS EN ISO 643:2020


This standard BS EN ISO 643:2020 Steels. Micrographic determination of the apparent grain size is classified in these ICS categories:
  • 77.040.99 Other methods of testing of metals

This document specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.