Zinc-Aluminum 8 (ZA-8, Z35636)

ZA-8 is an alloy of zinc, further classified as a zinc-aluminum. Z35636 is the UNS number for this material. ZA-8 is the industry name.

It has two common variants, each represented as a separate material. The Material Properties section below shows ranges encompassing all variants. For more specific values, follow the links in the Variant Materials section.

Material Properties

Base Metal Price19 % rel

Brinell Hardness87 to 100

Compressive (Crushing) Strength210 to 250 MPa (30 to 36 x 103 psi)

Density6.3 g/cm3 (390 lb/ft3)

Elastic (Young's, Tensile) Modulus85 to 86 GPa (12 x 106 psi)

Electrical Conductivity28 % IACS

Electrical Resistivity Order of Magnitude-7 10x Ω-m

Elongation at Break1.3 to 8.0 %

Fatigue Strength (Endurance Limit)51 to 100 MPa (7.4 to 15 x 103 psi)

Fracture Toughness13 MPa-m1/2

Knoop Hardness110 to 130

Melting Onset (Solidus)380 °C (720 °F)

Modulus of Resilience (Unit Resilience)260 to 490 kJ/m3

Poisson's Ratio0.26

Rockwell B Hardness54 to 65

Shear Modulus33 GPa (4.8 x 106 psi)

Shear Strength240 to 280 MPa (35 to 41 x 103 psi)

Solidification (Pattern Maker's) Shrinkage1.1 %

Specific Heat Capacity440 J/kg-K

Strength to Weight Ratio33 to 59 kN-m/kg

Tensile Strength: Ultimate (UTS)210 to 370 MPa (30 to 54 x 103 psi)

Tensile Strength: Yield (Proof)210 to 290 MPa (30 to 42 x 103 psi)

Thermal Conductivity120 W/m-K

Thermal Diffusivity43 m2/s

Thermal Expansion23 µm/m-K

Unit Rupture Work (Ultimate Resilience)2.7 to 3.1 MJ/m3

The length of each bar compares the given value to the highest value in the database.

Alloy Composition

Zinc (Zn)89.8 to 91.2 %

Aluminum (Al)8.0 to 8.8 %

Copper (Cu)0.8 to 1.3 %

Iron (Fe)0 to 0.075 %

Magnesium (Mg)0.015 to 0.030 %

Cadmium (Cd)0 to 0.0060 %

Lead (Pb)0 to 0.0060 %

Tin (Sn)0 to 0.0030 %

Further Reading

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

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

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