Nickel 689 vs. Nickel 684
Both nickel 689 and nickel 684 are nickel alloys. Both are furnished in the aged (precipitation hardened) condition. They have a moderately high 91% of their average alloy composition in common.
For each property being compared, the top bar is nickel 689 and the bottom bar is nickel 684.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 350 | |
| 310 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 23 | |
| 11 |
| Fatigue Strength, MPa | 420 | |
| 390 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 21 | |
| 17 |
| Shear Modulus, GPa | 80 | |
| 76 |
| Shear Strength, MPa | 790 | |
| 710 |
| Tensile Strength: Ultimate (UTS), MPa | 1250 | |
| 1190 |
| Tensile Strength: Yield (Proof), MPa | 690 | |
| 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 990 | |
| 1000 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1370 |
| Melting Onset (Solidus), °C | 1390 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 70 | |
| 75 |
| Density, g/cm3 | 8.5 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 11 | |
| 10 |
| Embodied Energy, MJ/kg | 150 | |
| 140 |
| Embodied Water, L/kg | 330 | |
| 360 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1170 | |
| 1610 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 41 | |
| 40 |
| Strength to Weight: Bending, points | 30 | |
| 30 |
| Thermal Shock Resistance, points | 35 | |
| 34 |
Alloy Composition
| Aluminum (Al), % | 0.75 to 1.3 | |
| 2.5 to 3.3 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0.0030 to 0.010 |
| Carbon (C), % | 0.1 to 0.2 | |
| 0 to 0.15 |
| Chromium (Cr), % | 18 to 20 | |
| 15 to 20 |
| Cobalt (Co), % | 9.0 to 11 | |
| 13 to 20 |
| Copper (Cu), % | 0 | |
| 0 to 0.15 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 to 4.0 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 0.75 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 3.0 to 5.0 |
| Nickel (Ni), % | 48.3 to 60.9 | |
| 42.7 to 64 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Titanium (Ti), % | 2.3 to 2.8 | |
| 2.5 to 3.3 |