C68000 Brass vs. C47000 Brass
Both C68000 brass and C47000 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is C68000 brass and the bottom bar is C47000 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 100 |
| Elongation at Break, % | 27 | |
| 36 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Shear Modulus, GPa | 40 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 390 | |
| 380 |
| Tensile Strength: Yield (Proof), MPa | 140 | |
| 150 |
Thermal Properties
| Brazing Temperature, °C | 880 to 980 | |
| 910 to 950 |
| Latent Heat of Fusion, J/g | 170 | |
| 170 |
| Maximum Temperature: Mechanical, °C | 120 | |
| 120 |
| Melting Completion (Liquidus), °C | 880 | |
| 900 |
| Melting Onset (Solidus), °C | 870 | |
| 890 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 390 |
| Thermal Conductivity, W/m-K | 96 | |
| 120 |
| Thermal Expansion, µm/m-K | 21 | |
| 21 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 23 |
| Density, g/cm3 | 8.0 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.7 |
| Embodied Energy, MJ/kg | 48 | |
| 47 |
| Embodied Water, L/kg | 330 | |
| 330 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 82 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 95 | |
| 100 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 20 | |
| 20 |
| Strength to Weight: Axial, points | 14 | |
| 13 |
| Strength to Weight: Bending, points | 15 | |
| 15 |
| Thermal Diffusivity, mm2/s | 31 | |
| 38 |
| Thermal Shock Resistance, points | 13 | |
| 13 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.010 | |
| 0 to 0.010 |
| Copper (Cu), % | 56 to 60 | |
| 57 to 61 |
| Iron (Fe), % | 0.25 to 1.3 | |
| 0 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0.010 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0.2 to 0.8 | |
| 0 |
| Silicon (Si), % | 0.040 to 0.15 | |
| 0 |
| Tin (Sn), % | 0.75 to 1.1 | |
| 0.25 to 1.0 |
| Zinc (Zn), % | 35.6 to 42.8 | |
| 37.5 to 42.8 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.4 |