C68700 Brass vs. C44300 Brass
Both C68700 brass and C44300 brass are copper alloys. Both are furnished in the O61 (annealed) temper. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is C68700 brass and the bottom bar is C44300 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Shear Modulus, GPa | 41 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 390 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 140 | |
| 120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 180 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 140 |
| Melting Completion (Liquidus), °C | 970 | |
| 940 |
| Melting Onset (Solidus), °C | 930 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 380 |
| Thermal Conductivity, W/m-K | 100 | |
| 110 |
| Thermal Expansion, µm/m-K | 19 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 23 | |
| 25 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 25 | |
| 27 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 26 |
| Density, g/cm3 | 8.3 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.8 |
| Embodied Energy, MJ/kg | 46 | |
| 46 |
| Embodied Water, L/kg | 340 | |
| 330 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 90 | |
| 65 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 19 | |
| 19 |
| Strength to Weight: Axial, points | 13 | |
| 12 |
| Strength to Weight: Bending, points | 14 | |
| 13 |
| Thermal Diffusivity, mm2/s | 30 | |
| 35 |
| Thermal Shock Resistance, points | 13 | |
| 12 |
Alloy Composition
| Aluminum (Al), % | 1.8 to 2.5 | |
| 0 |
| Arsenic (As), % | 0.020 to 0.1 | |
| 0.020 to 0.060 |
| Copper (Cu), % | 76 to 79 | |
| 70 to 73 |
| Iron (Fe), % | 0 to 0.060 | |
| 0 to 0.060 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 to 0.070 |
| Tin (Sn), % | 0 | |
| 0.9 to 1.2 |
| Zinc (Zn), % | 17.8 to 22.2 | |
| 25.2 to 29.1 |
| Residuals, % | 0 | |
| 0 to 0.4 |