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BS EN ISO 6508-2:2023 -TC 2024

BS EN ISO 6508-2:2023 -TC 2024

$186.33

Tracked Changes. Metallic materials. Rockwell hardness test – Verification and calibration of testing machines and indenters

Published By Publication Date Number of Pages
BSI 2024 68
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This document specifies two separate methods of verification of testing machines (direct and indirect) for determining Rockwell hardness in accordance with ISO 6508-1, together with a method for verifying Rockwell hardness indenters. The direct verification method is used to determine whether the main parameters associated with the machine function, such as applied force, depth measurement, and testing cycle timing, fall within specified tolerances. The indirect verification method uses a number of calibrated reference hardness blocks to determine how well the machine can measure a material of known hardness. This document is applicable to stationary and portable hardness testing machines. Attention is drawn to the fact that the use of tungsten carbide composite for ball indenters is considered to be the standard type of Rockwell indenter ball.

PDF Catalog

PDF Pages PDF Title
40 undefined
44 Foreword
45 1 Scope
2 Normative references
3 Terms and definitions
4 General conditions
46 5 Direct verification of the testing machine
5.1 General
5.2 Calibration and verification of the test force
47 5.3 Calibration and verification of the depth-measuring system
48 5.4 Calibration and verification of the testing cycle
5.5 Calibration and verification of the machine hysteresis
6 Indirect verification of the testing machine
6.1 General
6.2 Procedure
49 6.3 Repeatability
51 6.4 Bias
6.5 Uncertainty of measurement
7 Calibration and verification of Rockwell hardness indenters
7.1 General
7.2 Diamond indenter
7.2.1 General
7.2.2 Direct calibration and verification of the diamond indenter
52 7.2.3 Indirect verification of diamond indenters
53 7.3 Ball indenter
54 7.3.1 Direct calibration and verification of the ball indenter
7.3.2 Indirect verification of the ball holder assembly
55 7.4 Marking
8 Intervals between direct and indirect calibrations and verifications
56 9 Verification report
57 Annex A (normative) Repeatability of testing machines
59 Annex B (informative) Uncertainty of measurement of the calibration results of the hardness testing machine
67 Bibliography

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BS EN ISO 6508-2:2023 -TC 2024
$186.33