ZA-12 vs. ZA-8
Both ZA-12 and ZA-8 are zinc alloys. They have a very high 97% of their average alloy composition in common.
For each property being compared, the top bar is ZA-12 and the bottom bar is ZA-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 89 to 100 | |
| 87 to 100 |
| Compressive (Crushing) Strength, MPa | 230 to 270 | |
| 210 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 85 to 86 |
| Elongation at Break, % | 1.6 to 5.3 | |
| 1.3 to 8.0 |
| Fatigue Strength, MPa | 73 to 120 | |
| 51 to 100 |
| Fracture Toughness, MPa-m1/2 | 14 to 15 | |
| 13 |
| Knoop Hardness | 110 to 130 | |
| 110 to 130 |
| Poisson's Ratio | 0.26 | |
| 0.26 |
| Rockwell B Hardness | 56 to 63 | |
| 54 to 65 |
| Shear Modulus, GPa | 33 | |
| 34 |
| Shear Strength, MPa | 240 to 300 | |
| 240 to 280 |
| Tensile Strength: Ultimate (UTS), MPa | 260 to 400 | |
| 210 to 370 |
| Tensile Strength: Yield (Proof), MPa | 210 to 320 | |
| 210 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 120 | |
| 110 |
| Maximum Temperature: Mechanical, °C | 100 | |
| 100 |
| Melting Completion (Liquidus), °C | 430 | |
| 400 |
| Melting Onset (Solidus), °C | 380 | |
| 380 |
| Solidification (Pattern Maker's) Shrinkage, % | 1.3 | |
| 1.1 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 440 |
| Thermal Conductivity, W/m-K | 120 | |
| 120 |
| Thermal Expansion, µm/m-K | 24 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 28 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 42 | |
| 40 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 11 |
| Density, g/cm3 | 6.0 | |
| 6.3 |
| Embodied Carbon, kg CO2/kg material | 3.4 | |
| 3.3 |
| Embodied Energy, MJ/kg | 64 | |
| 62 |
| Embodied Water, L/kg | 440 | |
| 420 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.0 to 20 | |
| 2.8 to 28 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 620 | |
| 260 to 490 |
| Stiffness to Weight: Axial, points | 7.6 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 12 to 19 | |
| 9.3 to 17 |
| Strength to Weight: Bending, points | 15 to 20 | |
| 12 to 18 |
| Thermal Diffusivity, mm2/s | 43 | |
| 42 |
| Thermal Shock Resistance, points | 9.4 to 14 | |
| 7.6 to 13 |
Alloy Composition
| Aluminum (Al), % | 10.5 to 11.5 | |
| 8.0 to 8.8 |
| Cadmium (Cd), % | 0 to 0.0060 | |
| 0 to 0.0060 |
| Copper (Cu), % | 0.5 to 1.2 | |
| 0.8 to 1.3 |
| Iron (Fe), % | 0 to 0.075 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 to 0.0060 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0.015 to 0.030 | |
| 0.015 to 0.030 |
| Nickel (Ni), % | 0 to 0.020 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.060 | |
| 0 to 0.045 |
| Tin (Sn), % | 0 to 0.0030 | |
| 0 to 0.0030 |
| Zinc (Zn), % | 87.1 to 89 | |
| 89.7 to 91.2 |