Home / Standards / GB/T 46224-2025 GB/T 46224-2025 Active Methods for evaluating the nodularity of carbides 碳化物球化程度的评定方法 Standard Type GBT ICS 77.040.99 CCS H24 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A