Home / Standards / GB/T 15821-2025 GB/T 15821-2025 Active Metallic coatings—Methods of measurement of ductility 金属覆盖层 延展性测量方法 Standard Type GBT ICS 25.220.40 CCS A29 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A