C70250 Copper vs. C90500 Gun Metal
Both C70250 copper and C90500 gun metal are copper alloys. They have 89% of their average alloy composition in common. There are 24 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 C70250 copper and the bottom bar is C90500 gun metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Poisson's Ratio | 0.34 | |
| 0.34 |
| Shear Modulus, GPa | 44 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 740 | |
| 320 |
Thermal Properties
| Latent Heat of Fusion, J/g | 220 | |
| 190 |
| Maximum Temperature: Mechanical, °C | 210 | |
| 170 |
| Melting Completion (Liquidus), °C | 1100 | |
| 1000 |
| Melting Onset (Solidus), °C | 1080 | |
| 850 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 370 |
| Thermal Conductivity, W/m-K | 170 | |
| 75 |
| Thermal Expansion, µm/m-K | 17 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 36 to 50 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 37 to 51 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 31 | |
| 35 |
| Density, g/cm3 | 8.9 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 3.6 |
| Embodied Energy, MJ/kg | 45 | |
| 59 |
| Embodied Water, L/kg | 310 | |
| 390 |
Common Calculations
| Stiffness to Weight: Axial, points | 7.4 | |
| 6.9 |
| Stiffness to Weight: Bending, points | 18 | |
| 18 |
| Strength to Weight: Axial, points | 16 to 23 | |
| 10 |
| Strength to Weight: Bending, points | 16 to 21 | |
| 12 |
| Thermal Diffusivity, mm2/s | 49 | |
| 23 |
| Thermal Shock Resistance, points | 18 to 26 | |
| 12 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 | |
| 0 to 0.2 |
| Copper (Cu), % | 92.7 to 97.5 | |
| 86 to 89 |
| Iron (Fe), % | 0 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.3 |
| Magnesium (Mg), % | 0.050 to 0.3 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 |
| Nickel (Ni), % | 2.2 to 4.2 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 | |
| 0 to 1.5 |
| Silicon (Si), % | 0.25 to 1.2 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 | |
| 0 to 0.050 |
| Tin (Sn), % | 0 | |
| 9.0 to 11 |
| Zinc (Zn), % | 0 to 1.0 | |
| 1.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |