Nickel 684 vs. SAE-AISI D4 Steel
Nickel 684 belongs to the nickel alloys classification, while SAE-AISI D4 steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is nickel 684 and the bottom bar is SAE-AISI D4 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 | |
| 8.4 to 15 |
| Fatigue Strength, MPa | 390 | |
| 310 to 920 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 74 |
| Shear Strength, MPa | 710 | |
| 460 to 1210 |
| Tensile Strength: Ultimate (UTS), MPa | 1190 | |
| 760 to 2060 |
| Tensile Strength: Yield (Proof), MPa | 800 | |
| 470 to 1540 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1430 |
| Melting Onset (Solidus), °C | 1320 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 8.0 |
| Density, g/cm3 | 8.3 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 3.3 |
| Embodied Energy, MJ/kg | 140 | |
| 49 |
| Embodied Water, L/kg | 360 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 100 to 160 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 40 | |
| 27 to 75 |
| Strength to Weight: Bending, points | 30 | |
| 24 to 47 |
| Thermal Shock Resistance, points | 34 | |
| 23 to 63 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.3 | |
| 0 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 2.1 to 2.4 |
| Chromium (Cr), % | 15 to 20 | |
| 11 to 13 |
| Cobalt (Co), % | 13 to 20 | |
| 0 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 to 4.0 | |
| 80.6 to 86.3 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0 to 0.6 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 0.7 to 1.2 |
| Nickel (Ni), % | 42.7 to 64 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Titanium (Ti), % | 2.5 to 3.3 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0 to 1.0 |