BS EN ISO 6508-2:2023 2024

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

Published By	Publication Date	Number of Pages
BSI	2024	30

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Categories: 77.040.10 - Mechanical testing of metals, BSI

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Description

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.

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PDF Pages	PDF Title
2	undefined
6	Foreword
7	1 Scope 2 Normative references 3 Terms and definitions 4 General conditions
8	5 Direct verification of the testing machine 5.1 General 5.2 Calibration and verification of the test force
9	5.3 Calibration and verification of the depth-measuring system
10	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
11	6.3 Repeatability
13	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
14	7.2.3 Indirect verification of diamond indenters
15	7.3 Ball indenter
16	7.3.1 Direct calibration and verification of the ball indenter 7.3.2 Indirect verification of the ball holder assembly
17	7.4 Marking 8 Intervals between direct and indirect calibrations and verifications
18	9 Verification report
19	Annex A (normative) Repeatability of testing machines
21	Annex B (informative) Uncertainty of measurement of the calibration results of the hardness testing machine
29	Bibliography

Additional information

Status	Definitive
Pages	30
Publication Date	2024-01-02
ISBN	978 0 539 23986 7
Standard Number	BS EN ISO 6508-2:2023
Title	Metallic materials. Rockwell hardness test – Verification and calibration of testing machines and indenters
Identical National Standard Of	EN ISO 6508-2, ISO 6508-2
Replaces	BS EN ISO 6508-2:2015
Descriptors	Verification, Hardness testers, Testing conditions, Metals, Performance testing, Performance, Errors, Rockwell hardness measurement, Reproducibility, Test equipment, Calibration, Physical property measurement, Certificates of conformity, Force, Tolerances (measurement), Accuracy, Hardness measurement
Publisher	BSI
Committee	ISE/101/5
ICS Codes	77.040.10 - Mechanical testing of metals

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BS EN ISO 6508-2:2023 2024

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