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Zinc-Aluminum 8 (ZA-8, Z35636)

ZA-8 is a zinc-aluminum alloy. Z35636 is the UNS number for this material. ZA-8 is the common industry name.

The properties of ZA-8 include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 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

87 to 100

Compressive (Crushing) Strength

210 to 250 MPa 30 to 37 x 103 psi

Elastic (Young's, Tensile) Modulus

85 to 86 GPa 12 x 106 psi

Elongation at Break

1.3 to 8.0 %

Fatigue Strength

51 to 100 MPa 7.4 to 15 x 103 psi

Fracture Toughness

13 MPa-m1/2 11 to 12 x 103 psi-in1/2

Knoop Hardness

110 to 130

Poisson's Ratio

0.26

Rockwell B Hardness

54 to 65

Shear Modulus

34 GPa 4.9 x 106 psi

Shear Strength

240 to 280 MPa 35 to 40 x 103 psi

Tensile Strength: Ultimate (UTS)

210 to 370 MPa 31 to 54 x 103 psi

Tensile Strength: Yield (Proof)

210 to 290 MPa 30 to 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)

2.8 to 28 MJ/m3

Resilience: Unit (Modulus of Resilience)

260 to 490 kJ/m3

Stiffness to Weight: Axial

7.5 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

9.3 to 17 points

Strength to Weight: Bending

12 to 18 points

Thermal Diffusivity

42 m2/s

Thermal Shock Resistance

7.6 to 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

Similar Alloys

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