Home / Standards / GB/T 5027-2025 GB/T 5027-2025 Active Metallic materials—Sheet and strip—Determination of plastic strain ratio (r) 金属材料 薄板和薄带 塑性应变比(r值)的测定 Standard Type GBT ICS 77.040.10 CCS H23 Status 现行 Issue Date 2025-06-30 Implementation 2026-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A