4045 Aluminum vs. C23400 Brass
4045 aluminum belongs to the aluminum alloys classification, while C23400 brass belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is 4045 aluminum and the bottom bar is C23400 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 110 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 27 | |
| 42 |
| Tensile Strength: Ultimate (UTS), MPa | 120 | |
| 370 to 640 |
Thermal Properties
| Latent Heat of Fusion, J/g | 540 | |
| 190 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 160 |
| Melting Completion (Liquidus), °C | 600 | |
| 970 |
| Melting Onset (Solidus), °C | 580 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 900 | |
| 390 |
| Thermal Conductivity, W/m-K | 170 | |
| 120 |
| Thermal Expansion, µm/m-K | 21 | |
| 19 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 27 |
| Density, g/cm3 | 2.6 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 7.8 | |
| 2.6 |
| Embodied Energy, MJ/kg | 150 | |
| 43 |
| Embodied Water, L/kg | 1070 | |
| 320 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 54 | |
| 19 |
| Strength to Weight: Axial, points | 13 | |
| 12 to 21 |
| Strength to Weight: Bending, points | 21 | |
| 13 to 19 |
| Thermal Diffusivity, mm2/s | 74 | |
| 36 |
| Thermal Shock Resistance, points | 5.7 | |
| 12 to 22 |
Alloy Composition
| Aluminum (Al), % | 87.4 to 91 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 81 to 84 |
| Iron (Fe), % | 0 to 0.8 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Magnesium (Mg), % | 0 to 0.050 | |
| 0 |
| Manganese (Mn), % | 0 to 0.050 | |
| 0 |
| Silicon (Si), % | 9.0 to 11 | |
| 0 |
| Titanium (Ti), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 0 to 0.1 | |
| 15.7 to 19 |
| Residuals, % | 0 | |
| 0 to 0.2 |