Cu :0.15~0.4
Mn :0.15
Mg :0.8~1.2
Zn :0.25
Cr :0.04~0.35
Ti :0.15
Si :0.4~0.8
Fe :0.7 受拉屈服强度 55.2 MPa
延伸率25.0 %
弹性系数68.9 GPa
弯曲极限强度228 MPa