非合金钢和低合金钢成品化学成分允许偏差

常用金属工程材料 | 钢铁材料的基本知识 | 钢的成品化学成分允许偏差(GB/T 222-2006)

元素,规定化学成分上限值,允许偏差|上偏差,允许偏差|下偏差 C,≤0.25,0.02,0.02 C,>0.25~0.55,0.03,0.03 C,>0.55,0.04,0.04 Mn,≤0.80,0 ...