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| Chinese National Standard Category: Metallographic testing method |
| English Title: | Evaluation of macrostructural defects in structural steels—Acid etching method and ultrasonic testing method |
| Chinese Title: | 结构钢低倍组织缺陷评定 酸浸法和超声检测法 |
| Standard No.: | GB/T 1979-2025 |
| Category No.: | H24 |
| Issued by: | SAMR; SAC |
| Issued on: | 2025-8-29 |
| Implemented on: | 2026-3-1 |
| Status: | to be valid |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | |
| Superseding: | GB/T 1979-2001 STANDARD diagrams for macrostructure and defect of structural steels GB/T 7736-2008 Ultrasonic Inspecting Method for Macro-structure and Imperfection of Steel |
| Word Count: | 38500 words |
| Similar Standards: |
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