An ordinary grade for raw material aluminium slugs is 1070. 1070 is featured by high plasticity and erosion resistance, made into aluminum slugs of 5mm-110mm big, 1.4mm-25mm thick, and 17HB-21HB hard. 1070 grade is constituted of 99.7% aluminium and 0.3% Si, Fe, Cu, Mn, Mg, Zn etc., ranking top in softness of all aluminium alloys. Excellent heat and electricity conductivity …