Home / Standards / GB/T 46977-2026 GB/T 46977-2026 Upcoming Determination of nitrogen, sulfur and phosphorus in foundry reclaimed sand 铸造用再生砂氮、硫、磷含量测定方法 Standard Type GBT ICS 91.100.15 CCS J31 Status 即将实施 Issue Date 2026-01-28 Implementation 2026-08-01 Responsible Dept 国家标准委 Drafting Unit N/A