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| Chinese National Standard Category: Metal processing property test method |
| English Title: | Hardmetals; Metallographic determination of porosity and uncombined carbon |
| Chinese Title: | 硬质合金 孔隙度和非化合碳的金相测定 |
| Standard No.: | GB/T 3489-1983 |
| Category No.: | H23 |
| Issued by: | SAC |
| Issued on: | 1983-2-21 |
| Implemented on: | 1983-1-2 |
| Status: | superseded |
| Superseded by: | GB/T 3489-2015 Hardmetals—Metallographic determination of porosity and uncombined carbon |
| Superseded on: | 2016-7-1 |
| Abolished on: | 2016-07-01 |
| Superseding: | |
| Word Count: | 2500 words |
| Similar Standards: | GB/T 15615-1995 GB 7733-1987 GB 3246-1982 GB/T 239.1-2023 GB/T 239.2-2023 GB/T 17473.7-2022 GB/T 24524-2021 GB/T 24183-2021 GB/T 2976-2020 GB/T 244-2020 GB/T 4156-2020 GB/T 25048-2019 GB/T 34477-2017 GB/T 246-2017 GB/T 32976-2016 GB/T 245-2016 GB/T 235-2013 GB/T 238-2013 YS/T 799-2012 GB/T 239.2-2012 |
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