ISO 6508-2:2015 PDF

Scope: This part of ISO 6508 specifies two separate methods of verification of testing machines (direct and indirect) for determining Rockwell hardness in accordance with ISO 6508-1:2015, 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. The indirect method may be used on its own for periodic routine checking of the machine in service. If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently for each method. This part of ISO 6508 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. Steel indenter balls may continue to be used only when complying with ISO 6508-1:2015, Annex A.

ISO 6508-2:2015 Referenced Document

ISO 376:2011 Metallic materials - Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 6507-1:2005 Metallic materials - Vickers hardness test - Part 1: Test method
ISO 6508-1:2015 Metallic materials - Rockwell hardness test - Part 1: Test method
ISO 6508-3:2015 Metallic materials - Rockwell hardness test - Part 3: Calibration of reference blocks
ISO/IEC 17011:2004 Conformity assessment - General requirements for accreditation bodies accrediting conformity assessment bodies
ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories

2023 ISO 6508-2:2023 Metallic materials — Rockwell hardness test — Part 2: Verification and calibration of testing machines and indenters
2022 ISO 6508-2:2022 Metallic materials — Rockwell hardness test — Part 2: Verification and calibration of testing machines and indenters
2015 ISO 6508-2:2015 Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of testing machines and indenters
2005 ISO 6508-2:2005 Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T)
1999 ISO 6508-2:1999 Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T)