Home / Standards / GB/T 43409-2023 GB/T 43409-2023 Active Metallographic examination of carbon steel and low alloy steel castings for general engineering and sturctural purposes 一般工程与结构用碳钢及低合金钢铸件金相检验 Standard Type GBT ICS 77.140.80 CCS J31 Status 现行 Issue Date 2023-11-27 Implementation 2023-11-27 Responsible Dept 国家标准委 Drafting Unit N/A