Home / Standards / GB/T 31981-2015 GB/T 31981-2015 Active Methods of sampling and sample preparation for chemical composition analysis of titanium and titanium alloy 钛及钛合金化学成分分析取制样方法 Standard Type GBT ICS 77.120.50 CCS H64 Status 现行 Issue Date 2015-09-11 Implementation 2016-08-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A