Ocel - Mikrografické stanovení zdánlivé velikosti zrn (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN ISO 643
Classification mark: 420462
Catalog number: 520478
Publication date standards: 1.2.2025
The number of pages: 60
Approximate weight : 180 g (0.40 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN

Annotation of standard text ČSN EN ISO 643 (420462):

This document specifies micrographic methods 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