AISI 431 Stainless Steel vs. Monel 400
AISI 431 stainless steel belongs to the iron alloys classification, while Monel 400 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is Monel 400.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 160 |
| Elongation at Break, % | 15 to 17 | |
| 20 to 40 |
| Fatigue Strength, MPa | 430 to 610 | |
| 230 to 290 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 77 | |
| 62 |
| Shear Strength, MPa | 550 to 840 | |
| 370 to 490 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1380 | |
| 540 to 780 |
| Tensile Strength: Yield (Proof), MPa | 710 to 1040 | |
| 210 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 850 | |
| 1000 |
| Melting Completion (Liquidus), °C | 1510 | |
| 1350 |
| Melting Onset (Solidus), °C | 1450 | |
| 1300 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 430 |
| Thermal Conductivity, W/m-K | 26 | |
| 23 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.6 | |
| 3.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 3.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 50 |
| Density, g/cm3 | 7.7 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 7.9 |
| Embodied Energy, MJ/kg | 31 | |
| 110 |
| Embodied Water, L/kg | 120 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 180 | |
| 140 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1270 to 2770 | |
| 140 to 1080 |
| Stiffness to Weight: Axial, points | 14 | |
| 10 |
| Stiffness to Weight: Bending, points | 25 | |
| 21 |
| Strength to Weight: Axial, points | 32 to 50 | |
| 17 to 25 |
| Strength to Weight: Bending, points | 27 to 36 | |
| 17 to 21 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 6.1 |
| Thermal Shock Resistance, points | 28 to 43 | |
| 17 to 25 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.3 |
| Chromium (Cr), % | 15 to 17 | |
| 0 |
| Copper (Cu), % | 0 | |
| 28 to 34 |
| Iron (Fe), % | 78.2 to 83.8 | |
| 0 to 2.5 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 2.0 |
| Nickel (Ni), % | 1.3 to 2.5 | |
| 63 to 72 |
| 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 0.024 |