GB/T 230.2-2022 (English Version) PDF

Standard No.: GB/T 230.2-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 230.2-2022
Replace: GB/T 230.2-2012

Scope: This document specifies two inspection methods (direct inspection and indirect inspection) of the Rockwell hardness tester for determining the Rockwell hardness according to GB/T230.1, and specifies the inspection method of the Rockwell hardness indenter. The direct test method is suitable for checking whether the main parameters related to the function of the hardness tester are within the specified tolerances, such as test force, depth measurement, test cycle time. The indirect test method is suitable for using a set of calibrated standard hardness blocks to determine the performance of the durometer when measuring materials with known hardness. The indirect test method can be used alone for regular routine inspections using medium hardness testers. If the hardness tester can also be used for the hardness test of other hardness test methods, the hardness tester shall be tested separately according to each method. This document applies to both stationary hardness testers and portable hardness testers. Note that tungsten carbide alloy ball indenters have been considered as Rockwell hardness standard ball indenters. The steel ball indenter is limited to use under the conditions of Appendix A of GB/T230.1-2018.

GB/T 230.2-2022 Referenced Document

GB/T 13634 Metallic materials—Calibration of force-proving instruments used for the verification of uniaxial testing machines
GB/T 230.1-2018 Metallic materials.Rockwell hardness test.Part 1:Test method
GB/T 230.3-2022 Metallic materials—Rockwell hardness test—Part 3:Calibration of reference blocks
GB/T 4340.1 Metallic materials.Vickers hardness test.Part 1:Test method

2022 GB/T 230.2-2022 Metallic materials—Rockwell hardness test—Part 2: Verification and calibration of testing machines and indenters
2012 GB/T 230.2-2012 Metallic materials.Rockwell hardness test.Part 2:Verification and calibration of testing machines(scale A,B,C,D,E,F,G,H,K,N,T)
2002 GB/T 230.2-2002 Metallic Rockwell hardness test--Part 2: Verification and calibration of hardness testers(scales A,B,C,D,E,F,G,H,K,N,T)