非合金、低合金钢和合金钢的合金元素规定含量界限值(摘自GB/T 13304-1991

常用金属工程材料 | 钢铁材料的基本知识 | 钢铁材料的分类

合金元素,①|非合金钢<,①|低合金钢,①|合金钢≥ Al,0.10,,0.10 B,0.0005,,0.0005 Bi,0.10,,0.10 Cr,0.30,0.30~<0.50,0.50 Co,0 ...