Die Casting Resources

Mechanical Properties

  #3 #5 #7 #2 ZA-8 ZA-12 ZA-27
Ultimate Tensile Strength: psi x 103 (MPa) 41 (283) 48 (328) 41 (283) 52 (359) 54 (374) 58 (400) 61  (421)
Yield Strength - 0.2% Offset: psi x 103 (MPa) 32 (221) 39 (269) 32 (221) 41 (283) 42 (290) 46 (317) 55  (379)
Elongation: % in 2" 10 7 13 7 6-10 4-7 1-3
Shear Strength: psi x 103 (MPa) 31 (214) 38 (262) 31 (214) 46 (317) 40 (275) 43 (296) 47  (325)
Hardness: Brinell 82 91 80 100 95-110 95-115 105-125
Impact Strength: ft-lb (J) 432 (58) 482 (65) 432 (58) 352 (48) 313 (42) 213 (29) 93
(5)
Fatigue Strength Rotary Bend - 5x108 cycles: psi x 103 (MPa) 6.9 (48) 8.2 (57) 6.8 (47) 8.5 (59) 15 (103) 17 (117) 21  (145)
Compressive Yield Strength 0.1% Offset:
psi x 103 (MPa)		 604 (414) 874 (600) 604 (414) 934 (641) 37 (252) 39 (269) 52  (385)
Modulus of Elasticity - psi x 106
(MPa x 103)		 12.46 (85.5) 12.46 (85.5) 12.46 (85.5) 12.46 (85.5) - - -
Poisson's Ratio 0.27 0.27 0.27 0.27 0.29 0.30 0.32

 

Physical Properties

  #3 #5 #7 #2 ZA-8 ZA-12 ZA-27
Density: lb/cu in (g/cm3) .24 (6.6) .24 (6.6) .24 (6.6) .24 (6.6) .227 (6.3) .218 (6.0) .181 (5.0)
Melting Range: °F (°C) 718-728 (381-387) 717-727 (380-386) 718-728 (381-387) 715-734 (379-390) 707-759 (375-404) 710-810 (377-432) 708-903 (376-484)
Electrical Conductivity: %IACS 27 26 27 25 27.7 28.3 29.7
Thermal Conductivity: BTU/ft/hr/°F (W/m/hr/°C) 65.3 (113.0) 62.9 (108.9) 65.3 (113.0) 60.5 (104.7) 66.3 (114.7) 67.1 (116.1) 72.5  (125.5)
Coefficient of Thermal Expansion:
68-212°F µin/in/°F (100-200°C µm/mm/°C)		 15.2 (27.4) 15.2 (27.4) 15.2 (27.4) 15.4 (27.8) 12.9 (23.3) 13.4 (24.2) 14.4 (26.0)
Specific Heat: BTU/lb/°F (J/kg/°C) .10
(419)		 .10
(419)		 .10
(419)		 .10
(419)		 .104 (435) .107 (448) .125 (534)
Pattern of Die Shrinkage: in/in .007 .007 .007 .007 .007 .0075 .008

Compositions

Chemical Specification (per ASTM) (% by Weight) for ZAMAK Alloys
#3 #5 #7 #2
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
Mg  .03-.06  .020-.05  .03-.06  .03-
.08		  .01-.020  .005-.020  .025-.05  .020-.050
Cu  .10 max .25 max9  .7-1.1  .75-1.25  .10 max  .25 max  2.7-3.3  2.5-
3.0
Fe (max)  .035  .10  .035  .10  .075  .075  .035  .10
Pb (max)  .0040  .005  .0040  .005  .0020  .003  .0040  .005
Cd (max)  .0030  .004  .0030  .004  .0020  .002  .0030  .004
Sn (max)  .0015  .003  .0015  .003 .0010  .001  .0015  .003
Ni
(other)x10 		 -  -  -  -  .005-.020  .005-.020  -  -
Zn Bal. Bal. Bal. Bal. Bal. Bal. Bal. Bal.
Color Code
ASTM B908

None

 Black Brown Green


North American Die Casting Association
NADCA


Tooling and Manufacturing Association
Tooling and Manufacturing Asscociation




InterZinc


International Zinc Association
International Zinc Association


London Metal Exhange
London Metal Exchange

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