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Standard ČSN EN ISO 643 1.5.2025 preview

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ČSN EN ISO 643 (420462)

Steels - Micrographic determination of the apparent grain size

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STANDARD published on 1.5.2025


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The information about the standard:

Designation standards: ČSN EN ISO 643
Classification mark: 420462
Catalog number: 521452
Publication date standards: 1.5.2025
SKU: NS-1219598
The number of pages: 52
Approximate weight : 156 g (0.34 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Other methods of testing of metals

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

Tento dokument specifikuje mikrografickou metodu stanovení zdánlivé velikosti feritických nebo austenitických zrn v ocelích. Popisuje metody zviditelnění hranic zrn a určení průměrné velikosti zrn u vzorků s unimodálníNP1) distribucí velikosti. I když jsou zrna trojrozměrného tvaru, může rovina řezu protínat zrno v libovolném místě počínaje rohem zrna až k maximálnímu průměru zrna a takto tvořit řadu zdánlivých velikostí zrn ve dvourozměrné rovině, dokonce i u vzorků s dokonale konzistentní velikostí zrn

Preview of the standard ČSN EN ISO 643 (420462)

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