| Alloy | #3 | #5 | #7 | #2 | ZA-8 | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Specifications (per ASTM) (% by weight) | Ingot | Casting | Ingot | Casting | Ingot | Casting | Ingot | Casting | Ingot | Casting |
| Al | 3.9-4.3 | 3.5-4.3 | 3.9-4.3 | 3.5-4.3 | 3.9-4.3 | 3.5-4.3 | 3.9-4.3 | 3.5-4.3 | 8.2-8.8 | 8-8.8 |
| Mg | .025-.05 | .02-.05 | .03-.06 | .03-.08 | .01-.02 | .005-.02 | .025-.05 | .02-.050 | .02-.030 | .015-.03 |
| Cu | .1 max | .25 max | .75-1.25 | .75-1.25 | .1 max | .25 max | 2.6-2.9 | 2.5-3 | .8-1.3 | .8-1.3 |
| Fe (max) | .075 | .1 | .075 | .1 | .075 | .075 | .075 | .1 | .065 | .075 |
| Pb (max) | .004 | .005 | .004 | .005 | .002 | .003 | .004 | .005 | .005 | .006 |
| Cd (max) | .003 | .004 | .003 | .004 | .002 | .002 | .003 | .004 | .005 | .006 |
| Sn (max) | .002 | .003 | .002 | .003 | .001 | .001 | .002 | .003 | .002 | .003 |
| Ni (other) | - | - | - | - | .005-.02 | .005-.02 | - | - | - | - |
| Zn | Balance | Balance | Balance | Balance | Balance | Balance | Balance | Balance | Balance | Balance |