aluminium (Al)
Aluminium: allowance
silicon (Si)
Si: 1.0~ 1.5
iron
Iron: ≤0.50
copper
Copper: ≤0.20
manganese
Mn:≤0.20
magnesium
Mg: 0.25~0.6
chrome
Cr:≤0. 10
zinc (Zn)
Zinc: ≤0.20
titanium
Ti:≤0. 15
Other unspecified elements: each item: ≤ 0.05; Total: ≤0. 15