Nickel 685 vs. 705.0 Aluminum
Nickel 685 belongs to the nickel alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 nickel 685 and the bottom bar is 705.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 350 | |
| 62 to 65 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 69 |
| Elongation at Break, % | 17 | |
| 8.4 to 10 |
| Fatigue Strength, MPa | 470 | |
| 63 to 98 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 77 | |
| 26 |
| Tensile Strength: Ultimate (UTS), MPa | 1250 | |
| 240 to 260 |
| Tensile Strength: Yield (Proof), MPa | 850 | |
| 130 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 1000 | |
| 180 |
| Melting Completion (Liquidus), °C | 1380 | |
| 640 |
| Melting Onset (Solidus), °C | 1330 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 890 |
| Thermal Conductivity, W/m-K | 13 | |
| 140 |
| Thermal Expansion, µm/m-K | 12 | |
| 24 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 9.5 |
| Density, g/cm3 | 8.4 | |
| 2.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 8.4 |
| Embodied Energy, MJ/kg | 140 | |
| 150 |
| Embodied Water, L/kg | 340 | |
| 1170 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 18 to 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1820 | |
| 120 to 130 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 49 |
| Strength to Weight: Axial, points | 42 | |
| 24 to 26 |
| Strength to Weight: Bending, points | 31 | |
| 31 to 32 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 55 |
| Thermal Shock Resistance, points | 37 | |
| 11 |
Alloy Composition
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| Aluminum (Al), % | 1.2 to 1.6 | |
| 92.3 to 98.6 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0 |
| Carbon (C), % | 0.030 to 0.1 | |
| 0 |
| Chromium (Cr), % | 18 to 21 | |
| 0 to 0.4 |
| Cobalt (Co), % | 12 to 15 | |
| 0 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 2.0 | |
| 0 to 0.8 |
| Magnesium (Mg), % | 0 | |
| 1.4 to 1.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.6 |
| Molybdenum (Mo), % | 3.5 to 5.0 | |
| 0 |
| Nickel (Ni), % | 49.6 to 62.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 2.8 to 3.3 | |
| 0 to 0.25 |
| Zinc (Zn), % | 0.020 to 0.12 | |
| 0 to 3.3 |
| Residuals, % | 0 | |
| 0 to 0.15 |