Compositions of Zamac Alloys
Casting Limits, (per ASTM) (% By Weight)

Elements	2	3	5	7	ZA - 8	ZA - 12	ZA - 27
Al	3.5 – 4.3	3.5 - 4.3	3.5 - 4.3	3.5 - 4.3	10.5 - 11.5	10.5 - 11.5	25.0 - 28.0
Mg	0.02 – 0.05	0.02 - 0.05	0.03 - 0.08	0.005 - 0.020	0.015 - 0.030	0.015 - 0.030	0.010 - 0.020
Cu	2.5 - 3.0	0.25 max	0.75 - 1.25	0.25 max	0.5 - 1.2	0.5 - 1.2	2 - 2.5
Fe (max)	0.1	0.1	0.1	0.075	0.075	0.075	0.075
Pb (max)	0.005	0.005	0.005	0.003	0.006	0.006	0.006
Cd (max)	0.004	0.004	0.004	0.002	0.006	0.006	0.006
Sn (max)	0.003	0.003	0.003	0.001	0.003	0.003	0.003
Ni	-	-	-	0.005 - 0.020	-	-	-
Zn	Balance	Balance	Balance	Balance	Balance	Balance	Balance