C12900 Copper vs. C21000 Brass
Both C12900 copper and C21000 brass are copper alloys. They have a very high 95% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is C12900 copper and the bottom bar is C21000 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Elongation at Break, % | 2.8 to 50 | |
| 2.9 to 50 |
| Poisson's Ratio | 0.34 | |
| 0.34 |
| Shear Modulus, GPa | 43 | |
| 43 |
| Shear Strength, MPa | 150 to 210 | |
| 180 to 280 |
| Tensile Strength: Ultimate (UTS), MPa | 220 to 420 | |
| 240 to 450 |
| Tensile Strength: Yield (Proof), MPa | 75 to 380 | |
| 69 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 200 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 190 |
| Melting Completion (Liquidus), °C | 1080 | |
| 1070 |
| Melting Onset (Solidus), °C | 1030 | |
| 1050 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 390 |
| Thermal Conductivity, W/m-K | 380 | |
| 230 |
| Thermal Expansion, µm/m-K | 17 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 98 | |
| 56 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 98 | |
| 57 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 32 | |
| 30 |
| Density, g/cm3 | 9.0 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.6 |
| Embodied Energy, MJ/kg | 41 | |
| 42 |
| Embodied Water, L/kg | 330 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 11 to 88 | |
| 13 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 24 to 640 | |
| 21 to 830 |
| Stiffness to Weight: Axial, points | 7.2 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 18 | |
| 18 |
| Strength to Weight: Axial, points | 6.8 to 13 | |
| 7.4 to 14 |
| Strength to Weight: Bending, points | 9.1 to 14 | |
| 9.6 to 15 |
| Thermal Diffusivity, mm2/s | 110 | |
| 69 |
| Thermal Shock Resistance, points | 7.8 to 15 | |
| 8.1 to 15 |
Alloy Composition
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| Antimony (Sb), % | 0 to 0.0030 | |
| 0 |
| Arsenic (As), % | 0 to 0.012 | |
| 0 |
| Bismuth (Bi), % | 0 to 0.0030 | |
| 0 |
| Copper (Cu), % | 99.88 to 100 | |
| 94 to 96 |
| Iron (Fe), % | 0 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 to 0.0040 | |
| 0 to 0.030 |
| Nickel (Ni), % | 0 to 0.050 | |
| 0 |
| Silver (Ag), % | 0 to 0.054 | |
| 0 |
| Tellurium (Te), % | 0 to 0.025 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 3.7 to 6.0 |
| Residuals, % | 0 | |
| 0 to 0.2 |