Home / Standards / GB/T 34474.1-2017 GB/T 34474.1-2017 Abolished Determination of banded structure of steel—Part1：Micrographic method using standards diagrams 钢中带状组织的评定 第1部分：标准评级图法 Standard Type GBT ICS 77.040.99 CCS H24 Status 废止 Issue Date 2017-10-14 Implementation 2018-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A