AISI 431 Stainless Steel vs. Nickel 690
AISI 431 stainless steel belongs to the iron alloys classification, while nickel 690 belongs to the nickel alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 31 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 AISI 431 stainless steel and the bottom bar is nickel 690.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 | |
| 90 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 15 to 17 | |
| 3.4 to 34 |
| Fatigue Strength, MPa | 430 to 610 | |
| 180 to 300 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 79 |
| Shear Strength, MPa | 550 to 840 | |
| 420 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1380 | |
| 640 to 990 |
| Tensile Strength: Yield (Proof), MPa | 710 to 1040 | |
| 250 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 1010 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1380 |
| Melting Onset (Solidus), °C | 1450 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 14 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.6 | |
| 1.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 1.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 50 |
| Density, g/cm3 | 7.7 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 8.2 |
| Embodied Energy, MJ/kg | 31 | |
| 120 |
| Embodied Water, L/kg | 120 | |
| 290 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 180 | |
| 31 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1270 to 2770 | |
| 160 to 1440 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 50 | |
| 21 to 33 |
| Strength to Weight: Bending, points | 27 to 36 | |
| 20 to 27 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 3.5 |
| Thermal Shock Resistance, points | 28 to 43 | |
| 16 to 25 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.050 |
| Chromium (Cr), % | 15 to 17 | |
| 27 to 31 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 78.2 to 83.8 | |
| 7.0 to 11 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 1.3 to 2.5 | |
| 58 to 66 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |