硅鎂鐵

Si 40-48%, Mg 4-6/5-7/7-9%, Re 1-2%,

Ca 2-3.5%, Al 0.8%max

Or

Si 40-48%, Mg 10.5%min, Re 1-2%,

Ca 2-3.5%, Al 0.8%max

5-25mm/10-30mm 90%min