7129 Aluminum vs. 50Cr-50Ni Alloy
7129 Aluminum belongs to the aluminum alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (9, 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 7129 Aluminum and the bottom bar is 50Cr-50Ni alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 210 |
| Elongation at Break, % | 9.0 to 9.1 | |
| 5.7 |
| Poisson's Ratio | 0.33 | |
| 0.26 |
| Shear Modulus, GPa | 26 | |
| 84 |
| Tensile Strength: Ultimate (UTS), MPa | 430 | |
| 620 |
| Tensile Strength: Yield (Proof), MPa | 380 to 390 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 350 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 490 |
| Thermal Expansion, µm/m-K | 24 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 50 |
| Density, g/cm3 | 2.9 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 7.9 |
| Embodied Energy, MJ/kg | 150 | |
| 110 |
| Embodied Water, L/kg | 1150 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 to 38 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1090 | |
| 350 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 47 | |
| 25 |
| Strength to Weight: Axial, points | 41 | |
| 21 |
| Strength to Weight: Bending, points | 43 to 44 | |
| 20 |
| Thermal Shock Resistance, points | 19 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 91 to 94 | |
| 0 to 0.25 |
| Carbon (C), % | 0 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0 to 0.1 | |
| 48 to 52 |
| Copper (Cu), % | 0.5 to 0.9 | |
| 0 |
| Gallium (Ga), % | 0 to 0.030 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 0 to 1.0 |
| Magnesium (Mg), % | 1.3 to 2.0 | |
| 0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 | |
| 44.5 to 52 |
| Nitrogen (N), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 to 0.050 | |
| 0 to 0.5 |
| Vanadium (V), % | 0 to 0.050 | |
| 0 |
| Zinc (Zn), % | 4.2 to 5.2 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |