A.C%=0.78% B.C%=1.3% C.C%=4.3% D.C%=6.69%
A.Mn%>0.5% B.Mn%>0.3% C.Mn%>0.4% D.Mn%>0.8%
A.硬度 B.塑性 C.強度 D.剛度