Home / Standards / GB/T 26930.2-2011 GB/T 26930.2-2011 Active Carbonaceous materials for the production of primary aluminium - Pitch for electrodes - Part 2：Determination of softening point by the ring and ball method 原铝生产用炭素材料 煤沥青 第2部分：软化点的测定 环球法 Standard Type GBT ICS 71.100.10 CCS Q52 Status 现行 Issue Date 2011-07-19 Implementation 2012-05-01 Responsible Dept 中国有色金属工业协会 Drafting Unit 中国有色金属工业协会