Zamak 2 vs. Zamak 5
Both Zamak 2 and Zamak 5 are zinc alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is Zamak 2 and the bottom bar is Zamak 5.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 100 | |
| 92 |
| Compressive (Crushing) Strength, MPa | 640 | |
| 600 |
| Elastic (Young's, Tensile) Modulus, GPa | 87 | |
| 87 |
| Elongation at Break, % | 6.0 | |
| 6.3 |
| Fatigue Strength, MPa | 59 | |
| 56 |
| Knoop Hardness | 130 | |
| 120 |
| Poisson's Ratio | 0.26 | |
| 0.25 |
| Rockwell B Hardness | 63 | |
| 57 |
| Shear Modulus, GPa | 33 | |
| 33 |
| Shear Strength, MPa | 320 | |
| 260 |
| Tensile Strength: Ultimate (UTS), MPa | 360 | |
| 330 |
| Tensile Strength: Yield (Proof), MPa | 270 | |
| 240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 130 | |
| 120 |
| Maximum Temperature: Mechanical, °C | 95 | |
| 95 |
| Melting Completion (Liquidus), °C | 390 | |
| 390 |
| Melting Onset (Solidus), °C | 380 | |
| 380 |
| Solidification (Pattern Maker's) Shrinkage, % | 1.3 | |
| 1.2 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 410 |
| Thermal Conductivity, W/m-K | 110 | |
| 110 |
| Thermal Expansion, µm/m-K | 28 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 25 | |
| 26 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 35 | |
| 37 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 12 |
| Density, g/cm3 | 6.5 | |
| 6.4 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 3.0 |
| Embodied Energy, MJ/kg | 57 | |
| 57 |
| Embodied Water, L/kg | 380 | |
| 380 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 20 | |
| 19 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 | |
| 330 |
| Stiffness to Weight: Axial, points | 7.5 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 15 | |
| 14 |
| Strength to Weight: Bending, points | 17 | |
| 16 |
| Thermal Diffusivity, mm2/s | 41 | |
| 42 |
| Thermal Shock Resistance, points | 11 | |
| 9.9 |
Alloy Composition
| Aluminum (Al), % | 3.5 to 4.3 | |
| 3.5 to 4.3 |
| Cadmium (Cd), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Copper (Cu), % | 2.5 to 3.3 | |
| 0.7 to 1.3 |
| Iron (Fe), % | 0 to 0.1 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0.020 to 0.060 | |
| 0.025 to 0.080 |
| Nickel (Ni), % | 0 to 0.020 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tin (Sn), % | 0 to 0.0030 | |
| 0 to 0.0030 |
| Zinc (Zn), % | 92.2 to 94 | |
| 94.3 to 95.7 |