C91700 Bronze vs. C87200 Bronze
Both C91700 bronze and C87200 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 87% of their average alloy composition in common.
For each property being compared, the top bar is C91700 bronze and the bottom bar is C87200 bronze.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 90 | |
| 85 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 13 | |
| 30 |
| Poisson's Ratio | 0.34 | |
| 0.34 |
| Shear Modulus, GPa | 41 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 330 | |
| 380 |
| Tensile Strength: Yield (Proof), MPa | 170 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 200 |
| Melting Completion (Liquidus), °C | 1020 | |
| 970 |
| Melting Onset (Solidus), °C | 850 | |
| 860 |
| Specific Heat Capacity, J/kg-K | 370 | |
| 410 |
| Thermal Conductivity, W/m-K | 71 | |
| 28 |
| Thermal Expansion, µm/m-K | 18 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 10 | |
| 6.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 10 | |
| 6.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 29 |
| Density, g/cm3 | 8.7 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 3.9 | |
| 2.7 |
| Embodied Energy, MJ/kg | 63 | |
| 44 |
| Embodied Water, L/kg | 400 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 35 | |
| 93 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 | |
| 130 |
| Stiffness to Weight: Axial, points | 6.9 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 18 | |
| 19 |
| Strength to Weight: Axial, points | 11 | |
| 12 |
| Strength to Weight: Bending, points | 12 | |
| 14 |
| Thermal Diffusivity, mm2/s | 22 | |
| 8.0 |
| Thermal Shock Resistance, points | 12 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0050 | |
| 0 to 1.5 |
| Antimony (Sb), % | 0 to 0.2 | |
| 0 |
| Copper (Cu), % | 84.2 to 87.5 | |
| 89 to 99 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 2.5 |
| Lead (Pb), % | 0 to 0.25 | |
| 0 to 0.5 |
| Manganese (Mn), % | 0 | |
| 0 to 1.5 |
| Nickel (Ni), % | 1.2 to 2.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.3 | |
| 0 to 0.5 |
| Silicon (Si), % | 0 to 0.0050 | |
| 1.0 to 5.0 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 |
| Tin (Sn), % | 11.3 to 12.5 | |
| 0 to 1.0 |
| Zinc (Zn), % | 0 to 0.25 | |
| 0 to 5.0 |