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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. The property values on this page show ranges across all 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).

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

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 11470 to 11830 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

Melting Completion (Liquidus)

400 °C 760 °F

Melting Onset (Solidus)

380 °C 710 °F

Solidification (Pattern Maker's) Shrinkage

1.1 %

Specific Heat Capacity

430 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)

250 to 490 kJ/m3

Stiffness to Weight: Axial

7.6 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

9.4 to 17 points

Strength to Weight: Bending

13 to 18 points

Thermal Diffusivity

43 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

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

EN 12844: Zinc and zinc alloys - Castings - Specifications

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