Home / Standards / GB/T 12769-2025 GB/T 12769-2025 Upcoming Titanium-clad copper bar 钛铜复合棒 Standard Type GBT ICS 77.150.50 CCS H64 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A