Alloy #2 #3 #5 #7 ZA-8 AcuZinc
Mechanical Properties
Die Cast Die Cast Die Cast Die Cast Die Cast Die Cast
Ultimate Tensile Strength: Psi (MPa) 52,000 (359) 41,000 (283) 47,600 (328) 41,000 (283) 54,200 (374) 59,000 (407)
Yield Strength: (0.2% Offset) psi (MPa) 41,000 32,000 (221) 33,000 (228) 32,000 (221) 42,000 (290) 49,000 (338)
Elongation: % in 2” (51mm) 7 10 7 13 6-10 5
Shear Strength Psi (Mpa) Hardness: Brinell

46,000 (317) 100 31,000 (214) up to 82 38,000 (262) up to 91 31,000 (214) 80 40,000 (275) up to 110 40,600 (280) 118
Impact Strength: ft-lb (J) ¼” square specimen

35 (47.5) 43 (58) 48 (65) 43 (58) 24-35 (32-48)
Fatigue Strength Rotary Bend: 5×108 cycles psi x 10³ (MPa) 8.5 (58.6) 6.9 (47.6) 8.2 (56.5) 6.9 (47.6) 15 (103)
Compressive Yield Strength: 0.1% offset psi x 10³ (MPa) 93 (641) 60 (414) 87 (600) 60 (414) 37 (252)
Modulus of Elasticity: varies with stress level; applicable only for short-duration loads: psi x 106 (MPa x 10³) 12.4 (85.5) 12.4 (85.5) 12.4 (85.5) 12.4 (85.5) 12.4 (85.5)
PHYSICAL PROPERTIES
Density: lb/cu in (g/cu cm) .24 (6.6) .24 (6.6) .24 (6.6) .24 (6.6) .227 (6.3) .247 (6.85)
Melting Range: F° (C°) 715-734 (379-390) 718-728 (381-387) 717-727 (380-386) 718-728 (381-387) 707-759 (375-404) 755-936 (402-502)
Electrical Conductivity: % IACS 25 27 26 27 27.7 26.9
Thermal Conductivity: BTU/ft/hr/F° (W/m/hr/C°) 60.5 (104.7) 65.3 (113) 62.9 (109) 65.3 (113) 66.3 (115) 61.2 (106)
Coefficient of Thermal Expansion: 68-212 F° µin/in/F° (100-200 C° µm/mm/C°) 15.4 (27.8) 15.2 (27.4) 15.2 (27.4) 15.2 (27.4) 12.9 (23.2) 13.3 (24)
Specific Heat: BTU/lb/F° (J/kg/C°) .10 (419) .10 (419) .10 (419) .10 (419) .104 (435)
Shrinkage: in/in .006 .006 .006 .006 .007 .006
CHEMICAL SPECIFICATIONS
Al (Aluminum) 3.5-4.3 3.5-4.3 3.5-4.3 3.5-4.3 8.0-8.8 2.8-3.3
Mg (magnesium) .02-.05 .02-.05 .03-.008 .005-.020 .015-.030 .025-.05
Cu (Copper) 2.5-3.0 .25 max .75-1.25 .25 max .8-1.3 5.0-6.0
Fe (Iron) Max. .10 .10 .10 .075 .075 .075
Pb (Lead) Max. .005 .005 .005 .003 .006 .005
Cd (Cadmium) Max. .004 .004 .004 .002 .006 .004
Sn (Tin) Max. .003 .003 .003 .003 .003 .003
Ni (Nickel) Max. .035 .02 .02 .06 .01 .02