C85700 Brass vs. C87700 Bronze
Both C85700 brass and C87700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 71% of their average alloy composition in common.
For each property being compared, the top bar is C85700 brass and the bottom bar is C87700 bronze.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 17 | |
| 3.6 |
| Poisson's Ratio | 0.31 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 42 |
| Tensile Strength: Ultimate (UTS), MPa | 310 | |
| 300 |
| Tensile Strength: Yield (Proof), MPa | 110 | |
| 120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 170 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 120 | |
| 180 |
| Melting Completion (Liquidus), °C | 940 | |
| 980 |
| Melting Onset (Solidus), °C | 910 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 400 |
| Thermal Conductivity, W/m-K | 84 | |
| 120 |
| Thermal Expansion, µm/m-K | 21 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 22 | |
| 45 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 25 | |
| 48 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 24 | |
| 29 |
| Density, g/cm3 | 8.0 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.7 |
| Embodied Energy, MJ/kg | 47 | |
| 45 |
| Embodied Water, L/kg | 330 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 41 | |
| 8.6 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 59 | |
| 64 |
| Stiffness to Weight: Axial, points | 7.2 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 20 | |
| 19 |
| Strength to Weight: Axial, points | 11 | |
| 9.8 |
| Strength to Weight: Bending, points | 13 | |
| 12 |
| Thermal Diffusivity, mm2/s | 27 | |
| 34 |
| Thermal Shock Resistance, points | 10 | |
| 11 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.8 | |
| 0 |
| Antimony (Sb), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 58 to 64 | |
| 87.5 to 90.5 |
| Iron (Fe), % | 0 to 0.7 | |
| 0 to 0.5 |
| Lead (Pb), % | 0.8 to 1.5 | |
| 0 to 0.090 |
| Manganese (Mn), % | 0 | |
| 0 to 0.8 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 | |
| 0 to 0.15 |
| Silicon (Si), % | 0 to 0.050 | |
| 2.5 to 3.5 |
| Tin (Sn), % | 0.5 to 1.5 | |
| 0 to 2.0 |
| Zinc (Zn), % | 32 to 40 | |
| 7.0 to 9.0 |
| Residuals, % | 0 to 1.3 | |
| 0 to 0.8 |