C68800 Brass vs. Zamak 7
C68800 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 26% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is C68800 brass and the bottom bar is Zamak 7.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 86 |
| Elongation at Break, % | 2.0 to 36 | |
| 13 |
| Poisson's Ratio | 0.32 | |
| 0.25 |
| Shear Modulus, GPa | 41 | |
| 33 |
| Shear Strength, MPa | 380 to 510 | |
| 210 |
| Tensile Strength: Ultimate (UTS), MPa | 570 to 890 | |
| 280 |
| Tensile Strength: Yield (Proof), MPa | 390 to 790 | |
| 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 120 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 95 |
| Melting Completion (Liquidus), °C | 960 | |
| 390 |
| Melting Onset (Solidus), °C | 950 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 410 |
| Thermal Conductivity, W/m-K | 40 | |
| 110 |
| Thermal Expansion, µm/m-K | 19 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 27 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 20 | |
| 38 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 11 |
| Density, g/cm3 | 8.2 | |
| 6.4 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.0 |
| Embodied Energy, MJ/kg | 48 | |
| 57 |
| Embodied Water, L/kg | 350 | |
| 380 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 16 to 180 | |
| 36 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 710 to 2860 | |
| 370 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 19 | |
| 23 |
| Strength to Weight: Axial, points | 19 to 30 | |
| 12 |
| Strength to Weight: Bending, points | 19 to 25 | |
| 15 |
| Thermal Diffusivity, mm2/s | 12 | |
| 43 |
| Thermal Shock Resistance, points | 19 to 30 | |
| 8.6 |
Alloy Composition
| Aluminum (Al), % | 3.0 to 3.8 | |
| 3.5 to 4.3 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0020 |
| Cobalt (Co), % | 0.25 to 0.55 | |
| 0 |
| Copper (Cu), % | 70.8 to 75.5 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.0030 |
| Magnesium (Mg), % | 0 | |
| 0.0050 to 0.020 |
| Nickel (Ni), % | 0 | |
| 0.0050 to 0.020 |
| Tin (Sn), % | 0 | |
| 0 to 0.0010 |
| Zinc (Zn), % | 21.3 to 24.1 | |
| 95.3 to 96.5 |
| Residuals, % | 0 to 0.5 | |
| 0 |