CR021A Copper vs. C87400 Brass
Both CR021A copper and C87400 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 82% of their average alloy composition in common.
For each property being compared, the top bar is CR021A copper and the bottom bar is C87400 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Elongation at Break, % | 15 | |
| 21 |
| Poisson's Ratio | 0.34 | |
| 0.33 |
| Shear Modulus, GPa | 43 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 230 | |
| 390 |
| Tensile Strength: Yield (Proof), MPa | 140 | |
| 160 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 170 |
| Melting Completion (Liquidus), °C | 1090 | |
| 920 |
| Melting Onset (Solidus), °C | 1040 | |
| 820 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 400 |
| Thermal Conductivity, W/m-K | 380 | |
| 28 |
| Thermal Expansion, µm/m-K | 17 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 98 | |
| 6.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 99 | |
| 7.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 31 | |
| 27 |
| Density, g/cm3 | 9.0 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.7 |
| Embodied Energy, MJ/kg | 41 | |
| 44 |
| Embodied Water, L/kg | 320 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 31 | |
| 65 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 83 | |
| 120 |
| Stiffness to Weight: Axial, points | 7.2 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 18 | |
| 19 |
| Strength to Weight: Axial, points | 7.1 | |
| 13 |
| Strength to Weight: Bending, points | 9.3 | |
| 14 |
| Thermal Diffusivity, mm2/s | 110 | |
| 8.3 |
| Thermal Shock Resistance, points | 8.1 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.8 |
| Bismuth (Bi), % | 0 to 0.00050 | |
| 0 |
| Copper (Cu), % | 99.95 to 99.998 | |
| 79 to 85.5 |
| Lead (Pb), % | 0 to 0.0050 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0.0020 to 0.0070 | |
| 0 |
| Silicon (Si), % | 0 | |
| 2.5 to 4.0 |
| Silver (Ag), % | 0 to 0.015 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 12 to 16 |
| Residuals, % | 0 | |
| 0 to 0.8 |