Nickel 684 vs. AISI 303 Stainless Steel
Nickel 684 belongs to the nickel alloys classification, while AISI 303 stainless steel belongs to the iron alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is nickel 684 and the bottom bar is AISI 303 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 310 | |
| 170 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 11 | |
| 40 to 51 |
| Fatigue Strength, MPa | 390 | |
| 230 to 360 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 77 |
| Shear Strength, MPa | 710 | |
| 430 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 1190 | |
| 600 to 690 |
| Tensile Strength: Yield (Proof), MPa | 800 | |
| 230 to 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 1000 | |
| 930 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1450 |
| Melting Onset (Solidus), °C | 1320 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 15 |
| Density, g/cm3 | 8.3 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 3.0 |
| Embodied Energy, MJ/kg | 140 | |
| 42 |
| Embodied Water, L/kg | 360 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 240 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1610 | |
| 140 to 440 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 40 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 30 | |
| 20 to 22 |
| Thermal Shock Resistance, points | 34 | |
| 13 to 15 |
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 to 0.15 |
| Chromium (Cr), % | 15 to 20 | |
| 17 to 19 |
| Cobalt (Co), % | 13 to 20 | |
| 0 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 |
| Iron (Fe), % | 0 to 4.0 | |
| 67.3 to 74.9 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 0 |
| Nickel (Ni), % | 42.7 to 64 | |
| 8.0 to 10 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.2 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0.15 to 0.35 |
| Titanium (Ti), % | 2.5 to 3.3 | |
| 0 |