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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Status: | superseded |
Superseded by: | GB/T 2491-2003 Bonded abrasive products―Hardness grade measurement by rockwell tester |
Superseded on: | 2004-4-1 |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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