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Die Cast Zinc-Aluminum 8

Die cast ZA-8 is ZA-8 in the as-fabricated (no temper or treatment) condition. The graph bars on the material properties cards below compare die cast ZA-8 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

250 MPa 37 x 103 psi

Elastic (Young's, Tensile) Modulus

86 GPa 12 x 106 psi

Elongation at Break

8.0 %

Fatigue Strength

100 MPa 15 x 103 psi

Fracture Toughness

13 MPa-m1/2 11 x 103 psi-in1/2

Knoop Hardness

130

Poisson's Ratio

0.26

Rockwell B Hardness

65

Shear Modulus

34 GPa 4.9 x 106 psi

Shear Strength

280 MPa 40 x 103 psi

Tensile Strength: Ultimate (UTS)

370 MPa 54 x 103 psi

Tensile Strength: Yield (Proof)

290 MPa 42 x 103 psi

Thermal Properties

Latent Heat of Fusion

110 J/g

Maximum Temperature: Mechanical

100 °C 210 °F

Melting Completion (Liquidus)

400 °C 760 °F

Melting Onset (Solidus)

380 °C 710 °F

Solidification (Pattern Maker's) Shrinkage

1.1 %

Specific Heat Capacity

440 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

120 W/m-K 66 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

28 % IACS

Electrical Conductivity: Equal Weight (Specific)

40 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

6.3 g/cm3 390 lb/ft3

Embodied Carbon

3.3 kg CO2/kg material

Embodied Energy

62 MJ/kg 26 x 103 BTU/lb

Embodied Water

420 L/kg 50 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

28 MJ/m3

Resilience: Unit (Modulus of Resilience)

490 kJ/m3

Stiffness to Weight: Axial

7.5 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

18 points

Thermal Diffusivity

42 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Zinc (Zn) 89.7 to 91.2
Aluminum (Al) 8.0 to 8.8
Copper (Cu) 0.8 to 1.3
Iron (Fe) 0 to 0.075
Silicon (Si) 0 to 0.045
Magnesium (Mg) 0.015 to 0.030
Nickel (Ni) 0 to 0.020
Lead (Pb) 0 to 0.0060
Cadmium (Cd) 0 to 0.0060
Tin (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

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015