CC491K Bronze vs. CC381H Copper-nickel
Both CC491K bronze and CC381H copper-nickel are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 69% of their average alloy composition in common.
For each property being compared, the top bar is CC491K bronze and the bottom bar is CC381H copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 73 | |
| 91 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 140 |
| Elongation at Break, % | 13 | |
| 20 |
| Poisson's Ratio | 0.34 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 52 |
| Tensile Strength: Ultimate (UTS), MPa | 260 | |
| 380 |
| Tensile Strength: Yield (Proof), MPa | 120 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 260 |
| Melting Completion (Liquidus), °C | 980 | |
| 1180 |
| Melting Onset (Solidus), °C | 900 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 370 | |
| 410 |
| Thermal Conductivity, W/m-K | 71 | |
| 30 |
| Thermal Expansion, µm/m-K | 19 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 15 | |
| 6.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 15 | |
| 6.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 31 | |
| 40 |
| Density, g/cm3 | 8.9 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 3.1 | |
| 5.0 |
| Embodied Energy, MJ/kg | 51 | |
| 73 |
| Embodied Water, L/kg | 350 | |
| 280 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 27 | |
| 60 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 67 | |
| 68 |
| Stiffness to Weight: Axial, points | 6.7 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 18 | |
| 19 |
| Strength to Weight: Axial, points | 8.1 | |
| 12 |
| Strength to Weight: Bending, points | 10 | |
| 13 |
| Thermal Diffusivity, mm2/s | 22 | |
| 8.4 |
| Thermal Shock Resistance, points | 9.3 | |
| 13 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.010 | |
| 0 to 0.010 |
| Antimony (Sb), % | 0 to 0.25 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.030 |
| Copper (Cu), % | 81 to 87 | |
| 64.5 to 69.9 |
| Iron (Fe), % | 0 to 0.3 | |
| 0.5 to 1.5 |
| Lead (Pb), % | 4.0 to 6.0 | |
| 0 to 0.030 |
| Manganese (Mn), % | 0 | |
| 0.6 to 1.2 |
| Nickel (Ni), % | 0 to 2.0 | |
| 29 to 31 |
| Phosphorus (P), % | 0 to 0.1 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.010 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.1 | |
| 0 to 0.010 |
| Tin (Sn), % | 4.0 to 6.0 | |
| 0 |
| Zinc (Zn), % | 4.0 to 6.0 | |
| 0 to 0.5 |