Metallic materials. Knoop hardness test - Calibration of reference blocks Ingestion-build-50790 What is BS EN 2240-017

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This International Standard does not restrict the manufacturer from adding additional information

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Metallic materials. Knoop hardness test - Calibration of reference blocks Ingestion-build-50790 What is BS EN 2240-0171 Scope This document specifies the method for the calibration of reference blocks to be used for the indirect verification of Knoop hardness testing machines as specified in ISO 45452. The method is applicable only for indentations with long diagonals 0,020 mm.