Babban kamfanin: baosteel, taigang, anshan baƙin ƙarfe da ƙarfe smelting, shagang, namo, nanyang han, xingcheng, yingkou, masteel, tangsteel, Wen Feng, PingGang da sauran manyan karfe niƙa (' hukumar: Q235A, Q23DB, Q2535C Q2 Q235E), (ƙananan gami: Q345A, Q345B, Q345C Q345D, Q345E), (carbon karfe guitar: 35 #, 45 #, 50 #), farantin (kwantena): Q345R, (Boiler farantin: Q245R), (karfe, 65) mn, 40 cr, 42 crmo)