Nickel 684 vs. Nickel 685
Both nickel 684 and nickel 685 are nickel alloys. Both are furnished in the aged (precipitation hardened) condition. They have a moderately high 95% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is nickel 684 and the bottom bar is nickel 685.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 310 | |
| 350 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 11 | |
| 17 |
| Fatigue Strength, MPa | 390 | |
| 470 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 17 | |
| 20 |
| Shear Modulus, GPa | 76 | |
| 77 |
| Shear Strength, MPa | 710 | |
| 770 |
| Tensile Strength: Ultimate (UTS), MPa | 1190 | |
| 1250 |
| Tensile Strength: Yield (Proof), MPa | 800 | |
| 850 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 1000 | |
| 1000 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1380 |
| Melting Onset (Solidus), °C | 1320 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 460 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 75 |
| Density, g/cm3 | 8.3 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 10 |
| Embodied Energy, MJ/kg | 140 | |
| 140 |
| Embodied Water, L/kg | 360 | |
| 340 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1610 | |
| 1820 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 40 | |
| 42 |
| Strength to Weight: Bending, points | 30 | |
| 31 |
| Thermal Shock Resistance, points | 34 | |
| 37 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.3 | |
| 1.2 to 1.6 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0.0030 to 0.010 |
| Carbon (C), % | 0 to 0.15 | |
| 0.030 to 0.1 |
| Chromium (Cr), % | 15 to 20 | |
| 18 to 21 |
| Cobalt (Co), % | 13 to 20 | |
| 12 to 15 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 to 0.5 |
| Iron (Fe), % | 0 to 4.0 | |
| 0 to 2.0 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 3.5 to 5.0 |
| Nickel (Ni), % | 42.7 to 64 | |
| 49.6 to 62.5 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Titanium (Ti), % | 2.5 to 3.3 | |
| 2.8 to 3.3 |
| Zinc (Zn), % | 0 | |
| 0.020 to 0.12 |