C87700 Bronze vs. C84200 Brass
Both C87700 bronze and C84200 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 90% of their average alloy composition in common.
For each property being compared, the top bar is C87700 bronze and the bottom bar is C84200 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 3.6 | |
| 15 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 42 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 300 | |
| 250 |
| Tensile Strength: Yield (Proof), MPa | 120 | |
| 120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 180 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 150 |
| Melting Completion (Liquidus), °C | 980 | |
| 990 |
| Melting Onset (Solidus), °C | 900 | |
| 840 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 370 |
| Thermal Conductivity, W/m-K | 120 | |
| 72 |
| Thermal Expansion, µm/m-K | 18 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 45 | |
| 16 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 48 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 29 | |
| 30 |
| Density, g/cm3 | 8.5 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 3.1 |
| Embodied Energy, MJ/kg | 45 | |
| 51 |
| Embodied Water, L/kg | 310 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 8.6 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 64 | |
| 72 |
| Stiffness to Weight: Axial, points | 7.4 | |
| 6.9 |
| Stiffness to Weight: Bending, points | 19 | |
| 18 |
| Strength to Weight: Axial, points | 9.8 | |
| 8.2 |
| Strength to Weight: Bending, points | 12 | |
| 10 |
| Thermal Diffusivity, mm2/s | 34 | |
| 23 |
| Thermal Shock Resistance, points | 11 | |
| 9.1 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 to 0.1 | |
| 0 to 0.25 |
| Copper (Cu), % | 87.5 to 90.5 | |
| 78 to 82 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.4 |
| Lead (Pb), % | 0 to 0.090 | |
| 2.0 to 3.0 |
| Manganese (Mn), % | 0 to 0.8 | |
| 0 |
| Nickel (Ni), % | 0 to 0.25 | |
| 0 to 0.8 |
| Phosphorus (P), % | 0 to 0.15 | |
| 0 to 1.5 |
| Silicon (Si), % | 2.5 to 3.5 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 | |
| 0 to 0.080 |
| Tin (Sn), % | 0 to 2.0 | |
| 4.0 to 6.0 |
| Zinc (Zn), % | 7.0 to 9.0 | |
| 10 to 16 |
| Residuals, % | 0 | |
| 0 to 0.7 |