Nickel 617 vs. Nickel 686
Both nickel 617 and nickel 686 are nickel alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common.
For each property being compared, the top bar is nickel 617 and the bottom bar is nickel 686.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 220 |
| Elongation at Break, % | 40 | |
| 51 |
| Fatigue Strength, MPa | 220 | |
| 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 80 | |
| 77 |
| Shear Strength, MPa | 510 | |
| 560 |
| Tensile Strength: Ultimate (UTS), MPa | 740 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 280 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 1010 | |
| 980 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1380 |
| Melting Onset (Solidus), °C | 1330 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 420 |
| Thermal Conductivity, W/m-K | 13 | |
| 9.8 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.4 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.5 | |
| 1.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 70 |
| Density, g/cm3 | 8.5 | |
| 9.0 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 12 |
| Embodied Energy, MJ/kg | 140 | |
| 170 |
| Embodied Water, L/kg | 350 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 190 | |
| 280 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 22 |
| Strength to Weight: Axial, points | 24 | |
| 24 |
| Strength to Weight: Bending, points | 21 | |
| 21 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 2.6 |
| Thermal Shock Resistance, points | 21 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0.8 to 1.5 | |
| 0 |
| Boron (B), % | 0 to 0.0060 | |
| 0 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0 to 0.010 |
| Chromium (Cr), % | 20 to 24 | |
| 19 to 23 |
| Cobalt (Co), % | 10 to 15 | |
| 0 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.75 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 15 to 17 |
| Nickel (Ni), % | 44.5 to 62 | |
| 49.5 to 63 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0.020 to 0.25 |
| Tungsten (W), % | 0 | |
| 3.0 to 4.4 |