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Standard ČSN EN ISO 4545-1 1.4.2024 preview

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ČSN EN ISO 4545-1 (420376)

Metallic materials - Knoop hardness test - Part 1: Test method

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STANDARD published on 1.4.2024


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The information about the standard:

Designation standards: ČSN EN ISO 4545-1
Classification mark: 420376
Catalog number: 518998
Publication date standards: 1.4.2024
SKU: NS-1170027
The number of pages: 32
Approximate weight : 96 g (0.21 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Mechanical testing of metals

Annotation of standard text ČSN EN ISO 4545-1 (420376):

Tento dokument specifikuje metodu zkoušení tvrdosti podle Knoopa u kovových materiálů pro zkušební zatížení od 0,009 807 N do 19,613 N. Tento dokument specifikuje metodu zkoušení tvrdosti podle Knoopa pro délky úhlopříček vtisku >= 0,020 mm. Používání této metody k určení tvrdosti podle Knoopa u menších vtisků je mimo rámec tohoto dokumentu, jelikož výsledky by byly zatíženy velkými nejistotami v důsledku mezí optického měření a nedokonalostí geometrie vnikacího hrotu. Zkoušení tvrdosti podle Knoopa specifikované v tomto dokumentu je rovněž aplikovatelné na kovové a jiné anorganické povlaky, včetně povlaků galvanických, autokatalytických, nástřikových povlaků a povlaků anodických na hliníku. Tento dokument je použitelný pro měření provedené kolmo k potaženému povrchu a na měření na průřezech za předpokladu, že vlastnosti povlaku (hladkost, tloušťka atd.) umožňují přesné odečítání úhlopříčky vtisku. Tento dokument není použitelný pro povlaky s tloušťkou pod 0,007 mm, pokud se zkoušení provádí kolmo k povrchu povlaku. Tento dokument neplatí pro povlaky s tloušťkou pod 0,020 mm, jestliže se zkouší příčný řez povlaku. ISO 14577-1 lze použít pro stanovení tvrdosti z menších vtisků. Pro rutinní kontrolu zkušebního stroje v provozu je stanovena metoda pravidelného ověřování uživatelem

Preview of the standard ČSN EN ISO 4545-1 (420376)

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