C68800 Brass vs. C99750 Brass
Both C68800 brass and C99750 brass are copper alloys. They have 80% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is C68800 brass and the bottom bar is C99750 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 130 |
| Elongation at Break, % | 2.0 to 36 | |
| 20 to 30 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Rockwell B Hardness | 81 to 99 | |
| 77 to 82 |
| Shear Modulus, GPa | 41 | |
| 48 |
| Tensile Strength: Ultimate (UTS), MPa | 570 to 890 | |
| 450 to 520 |
| Tensile Strength: Yield (Proof), MPa | 390 to 790 | |
| 220 to 280 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 200 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 160 |
| Melting Completion (Liquidus), °C | 960 | |
| 840 |
| Melting Onset (Solidus), °C | 950 | |
| 820 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 410 |
| Thermal Expansion, µm/m-K | 19 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 18 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 20 | |
| 2.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 23 |
| Density, g/cm3 | 8.2 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.1 |
| Embodied Energy, MJ/kg | 48 | |
| 51 |
| Embodied Water, L/kg | 350 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 16 to 180 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 710 to 2860 | |
| 190 to 300 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 19 | |
| 21 |
| Strength to Weight: Axial, points | 19 to 30 | |
| 15 to 18 |
| Strength to Weight: Bending, points | 19 to 25 | |
| 16 to 18 |
| Thermal Shock Resistance, points | 19 to 30 | |
| 13 to 15 |
Alloy Composition
| Aluminum (Al), % | 3.0 to 3.8 | |
| 0.25 to 3.0 |
| Cobalt (Co), % | 0.25 to 0.55 | |
| 0 |
| Copper (Cu), % | 70.8 to 75.5 | |
| 55 to 61 |
| Iron (Fe), % | 0 to 0.2 | |
| 0 to 1.0 |
| Lead (Pb), % | 0 to 0.050 | |
| 0.5 to 2.5 |
| Manganese (Mn), % | 0 | |
| 17 to 23 |
| Nickel (Ni), % | 0 | |
| 0 to 5.0 |
| Zinc (Zn), % | 21.3 to 24.1 | |
| 17 to 23 |
| Residuals, % | 0 | |
| 0 to 0.3 |