Home / Standards / GB/T 15712-2016 GB/T 15712-2016 Active Microalloyed medium carbon steels 非调质机械结构钢 Standard Type GBT ICS 77.140.60 CCS H40 Status 现行 Issue Date 2016-08-29 Implementation 2017-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会