EN
SR EN ISO 643:2013
Oţeluri. Determinarea micrografică a mărimii grăuntelui aparent
ISO 643:2012 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.
Status :
Anulat
Data aprobării : 31.05.2013
Data anulării : 30.04.2020
Număr de pagini : 44
ICS : 77.040.99 Alte metode de încercari ale metalelor
Comitet tehnic : 42 - Oţeluri şi feroaliaje
- Inlocuieste SR EN ISO 643:2003
- Inlocuit prin SR EN ISO 643:2020