Nickel 684 vs. SAE-AISI 8620 Steel
Nickel 684 belongs to the nickel alloys classification, while SAE-AISI 8620 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is nickel 684 and the bottom bar is SAE-AISI 8620 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 310 | |
| 150 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 | |
| 13 to 31 |
| Fatigue Strength, MPa | 390 | |
| 270 to 360 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Shear Strength, MPa | 710 | |
| 340 to 420 |
| Tensile Strength: Ultimate (UTS), MPa | 1190 | |
| 520 to 690 |
| Tensile Strength: Yield (Proof), MPa | 800 | |
| 360 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1000 | |
| 410 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1460 |
| Melting Onset (Solidus), °C | 1320 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 2.6 |
| Density, g/cm3 | 8.3 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 1.5 |
| Embodied Energy, MJ/kg | 140 | |
| 20 |
| Embodied Water, L/kg | 360 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 86 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1610 | |
| 340 to 880 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 40 | |
| 18 to 24 |
| Strength to Weight: Bending, points | 30 | |
| 18 to 22 |
| Thermal Shock Resistance, points | 34 | |
| 15 to 20 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.3 | |
| 0 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 15 to 20 | |
| 0.4 to 0.6 |
| Cobalt (Co), % | 13 to 20 | |
| 0 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 |
| Iron (Fe), % | 0 to 4.0 | |
| 96.9 to 98 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0.7 to 0.9 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 42.7 to 64 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.75 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |
| Titanium (Ti), % | 2.5 to 3.3 | |
| 0 |