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Die Cast Zinc-Aluminum 12

Die cast ZA-12 is ZA-12 in the as-fabricated (no temper or treatment) condition. It has the highest strength and highest ductility compared to the other variants of ZA-12. The graph bars on the material properties cards below compare die cast ZA-12 to: zinc-aluminums (top), all zinc alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

100

Compressive (Crushing) Strength

270 MPa 39 x 103 psi

Elastic (Young's, Tensile) Modulus

83 GPa 12 x 106 psi

Elongation at Break

5.3 %

Fatigue Strength

120 MPa 17 x 103 psi

Fracture Toughness

14 MPa-m1/2 13 x 103 psi-in1/2

Knoop Hardness

130

Poisson's Ratio

0.26

Rockwell B Hardness

63

Shear Modulus

33 GPa 4.8 x 106 psi

Shear Strength

300 MPa 43 x 103 psi

Tensile Strength: Ultimate (UTS)

400 MPa 59 x 103 psi

Tensile Strength: Yield (Proof)

320 MPa 46 x 103 psi

Thermal Properties

Latent Heat of Fusion

120 J/g

Maximum Temperature: Mechanical

100 °C 220 °F

Melting Completion (Liquidus)

430 °C 810 °F

Melting Onset (Solidus)

380 °C 710 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

450 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

120 W/m-K 67 BTU/h-ft-°F

Thermal Expansion

24 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

28 % IACS

Electrical Conductivity: Equal Weight (Specific)

42 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

6.0 g/cm3 380 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

64 MJ/kg 28 x 103 BTU/lb

Embodied Water

440 L/kg 52 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

20 MJ/m3

Resilience: Unit (Modulus of Resilience)

620 kJ/m3

Stiffness to Weight: Axial

7.6 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

20 points

Thermal Diffusivity

43 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Zinc (Zn)Zn 87.1 to 89
Aluminum (Al)Al 10.5 to 11.5
Copper (Cu)Cu 0.5 to 1.2
Iron (Fe)Fe 0 to 0.075
Silicon (Si)Si 0 to 0.060
Magnesium (Mg)Mg 0.015 to 0.030
Nickel (Ni)Ni 0 to 0.020
Lead (Pb)Pb 0 to 0.0060
Cadmium (Cd)Cd 0 to 0.0060
Tin (Sn)Sn 0 to 0.0030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

EN 12844: Zinc and zinc alloys - Castings - Specifications

Corrosion and Electrochemistry of Zinc, Xiaoge Gregory Zhang, 1996

ASTM B86: Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings

Corrosion Resistance of Zinc and Zinc Alloys, Frank C. Porter, 1994

Zinc Handbook: Properties, Processing, and Use In Design, Frank C. Porter, 1991

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993