Home / Standards / GB/T 31297-2014 GB/T 31297-2014 Active TC4 ELI titanium alloy plate and sheet TC4 ELI钛合金板材 Standard Type GBT ICS 77.150.50 CCS H64 Status 现行 Issue Date 2014-12-05 Implementation 2015-05-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A