Home / Standards / GB/T 6394-2017 GB/T 6394-2017 Active Determination of estimating the average grain size of metal 金属平均晶粒度测定方法 Standard Type GBT ICS 77.040.99 CCS H24 Status 现行 Issue Date 2017-02-28 Implementation 2017-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A