Nickel 725 vs. Nickel 686
Both nickel 725 and nickel 686 are nickel alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is nickel 725 and the bottom bar is nickel 686.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 34 | |
| 51 |
| Fatigue Strength, MPa | 260 | |
| 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Shear Strength, MPa | 580 | |
| 560 |
| Tensile Strength: Ultimate (UTS), MPa | 860 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 350 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 980 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1380 |
| Melting Onset (Solidus), °C | 1270 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 420 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.5 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.6 | |
| 1.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 70 |
| Density, g/cm3 | 8.5 | |
| 9.0 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 12 |
| Embodied Energy, MJ/kg | 190 | |
| 170 |
| Embodied Water, L/kg | 270 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 300 | |
| 280 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 22 |
| Strength to Weight: Axial, points | 28 | |
| 24 |
| Strength to Weight: Bending, points | 24 | |
| 21 |
| Thermal Shock Resistance, points | 23 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.35 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.010 |
| Chromium (Cr), % | 19 to 22.5 | |
| 19 to 23 |
| Iron (Fe), % | 2.3 to 15.3 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0 to 0.75 |
| Molybdenum (Mo), % | 7.0 to 9.5 | |
| 15 to 17 |
| Nickel (Ni), % | 55 to 59 | |
| 49.5 to 63 |
| Niobium (Nb), % | 2.8 to 4.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.2 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.020 |
| Titanium (Ti), % | 1.0 to 1.7 | |
| 0.020 to 0.25 |
| Tungsten (W), % | 0 | |
| 3.0 to 4.4 |