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 mm2/s
Thermal Shock Resistance
7.6 to 13 points
Alloy Composition
| Zn | 89.7 to 91.2 | |
| Al | 8.0 to 8.8 | |
| Cu | 0.8 to 1.3 | |
| Fe | 0 to 0.075 | |
| Si | 0 to 0.045 | |
| Mg | 0.015 to 0.030 | |
| Ni | 0 to 0.020 | |
| Pb | 0 to 0.0060 | |
| Cd | 0 to 0.0060 | |
| 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