Standard No.:	GB/T 230.1-2009
English Name:	Metallic materials - Rockwell hardness test - Part 1: Test method(scales A, B, C, D, E, F, G, H, K, N, T)
Chinese Name:	金属材料 洛氏硬度试验 第1部分：试验方法（A、B、C、D、E、F、G、H、K、N、T标尺）
Chinese Classification:	H22    Metal mechanical property test method
Professional Classification:	GB    National Standard
ICS Classification:	77.040.10 77.040.10    Mechanical testing of metals 77.040.10
Issued by:	AQSIQ, SAC
Issued on:	2009-6-25
Implemented on:	2010-4-1
Status:	superseded
Superseded by:	GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method
Superseded on:	2018-12-1
Superseding:	GB/T 230.1-2004 Metallic Rockwell hardness test—Part 1:Test method(scales A, B, C, D, E, F, G, H, K, N, T))
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	120.0
Delivery:	via email in 1 business day

This Part of GB/T 230 specifies the principle, symbols and description, test equipment, test piece, test procedures, uncertainty of results and test report of Rockwell hardness and Rockwell superficial hardness test for metallic materials. Attention is drawn to the fact that, spherical hard alloy indenters are considered to be the standard type of Rockwell hardness indenters. Steel ball indenters may be used if specified in a product standard or agreement. Note 1: attention is drawn to the fact that results obtained with two kinds of balls for the hardness test can be different. For specific materials and/or products, other standards apply. Note 2: for certain materials, the application scope may be narrower than those specified.

Foreword i 1 Scope 1 2 Normative References 1 3 Principle 1 4 Symbols and Description 2 5 Test Equipment 2 5.1 Hardness Tester 2 5.2 Indenter 2 5.3 Measuring System 2 6 Test Piece 2 7 Test Procedures 3 8 Uncertainty of the Results 4 9 Test Report 4 Appendix A (Normative) HR30Tm and HR15Tm Test Specification for Thin Products 6 Appendix B (Normative) Minimum Thickness Relational Graph of the Test Piece in Relation to the Rockwell Hardness 7 Appendix C (Normative) Correction Values of Rockwell Hardness Tested on the Convex Cylindrical Surface 9 Appendix D (Normative) Correction Table of Rockwell Hardness C Scale Tested on the Convex Spherical Surface 12 Appendix E (Informative) Method for Periodic Check of Hardness Tester by the User 13 Appendix F (Informative) Descriptions on Diamond Indenters 14 Appendix G (Informative) Uncertainty Evaluation for the Measured Hardness Values 15

* GB/T 230.2-2012 Metallic materials—Rockwell hardness test—Part 2:Verification and calibration of testing machines
* GB/T 230.3-2012 Metallic materials - Rockwell hardness test - Part 3：Calibration of reference blocks(scales A,B,C,D,E,F,G,H,K,N,T)
* JJF 1059-1999 Evaluation and Expression of Uncertaintv in Measurement