AISI 440A Stainless Steel vs. Grade 366 Molybdenum
AISI 440A stainless steel belongs to the iron alloys classification, while grade 366 molybdenum belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is grade 366 molybdenum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 300 |
| Elongation at Break, % | 5.0 to 20 | |
| 2.2 |
| Poisson's Ratio | 0.28 | |
| 0.3 |
| Shear Modulus, GPa | 77 | |
| 120 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 580 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 210 |
| Thermal Expansion, µm/m-K | 10 | |
| 7.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 12 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 27 |
| Embodied Energy, MJ/kg | 31 | |
| 340 |
| Embodied Water, L/kg | 120 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 12 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 18 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 13 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 13 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 18 |
Alloy Composition
| Carbon (C), % | 0.6 to 0.75 | |
| 0 to 0.030 |
| Chromium (Cr), % | 16 to 18 | |
| 0 |
| Iron (Fe), % | 78.4 to 83.4 | |
| 0 to 0.010 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 66.9 to 73 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0020 |
| Nitrogen (N), % | 0 | |
| 0 to 0.0020 |
| Oxygen (O), % | 0 | |
| 0 to 0.0025 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.010 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tungsten (W), % | 0 | |
| 27 to 33 |