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Chinese National Standard Category: Metal material testing machine

English Title: Bonded abrasives hardness measurement by Rockwell tester
Chinese Title: 洛氏硬度计检验磨具硬度的方法
Standard No.: GB/T 2491-1984
Category No.: N71
Issued by:
Issued on: 1984-01-14
Implemented on: 1985-1-1
Status: superseded
Superseded by:GB/T 2491-2003 Bonded abrasive products―Hardness grade measurement by rockwell tester
Superseded on:2004-4-1
Abolished on:
Superseding:GB 2491-1981
Word Count:500 words
Similar Standards: GB/T 43432.3-2023   GB/T 16826-2023   GB/T 43432.2-2023   GB/T 16491-2022   GB/T 16825.1-2022   GB/T 231.2-2022   GB/T 230.2-2022   GB/T 231.3-2022   GB/T 21838.3-2022   GB/T 17394.2-2022   GB/T 17394.3-2022   GB/T 21838.2-2022   GB/T 25917.2-2019   GB/T 38250-2019   GB/T 25917.1-2019   GB/T 18658-2018   GB/T 3808-2018   GB/T 16825.2-2018   GB/T 20485.33-2018   GB/T 4341.3-2016  
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