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Hardness testing of metallic materials - Proof of suitability for hardness testing machines - Accuracy, precision, linearity, stability and measurement uncertainty for the Rockwell C (HRC)

Draft technical rule

VDI/VDE 2625 Blatt 1.1:2025-04 - Draft

Hardness testing of metallic materials - Proof of suitability for hardness testing machines - Accuracy, precision, linearity, stability and measurement uncertainty for the Rockwell C (HRC)

German title
Härteprüfung an metallischen Werkstoffen - Eignungsnachweis für Härteprüfmaschinen - Richtigkeit, Präzision, Linearität, Stabilität und Messunsicherheit für Verfahren Rockwell C (HRC)
Publication date
2025-04
Original language
German
Pages
23

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Publication date
2025-04
Original language
German
Pages
23

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Short description

The standard describes a procedure for determining the suitability of hardness testing machines according to the Rockwell C method. The procedure takes into account that the measured hardness value is a material parameter and not a physical value. The measured hardness value is the result of an indentation test, which is always accompanied by localised destruction of the material surface and therefore cannot be repeated on the same spot. Proof of suitability is considered taking into account the measurement uncertainty of the hardness testing machine and the specified tolerances from design and production, as well as the scatter of the production process. This standard thus creates a standardised and inter-company basis for objective system assessment for manufacturers and users.

Content

ICS

77.040.01
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