SAE-AISI 1144 Steel vs. AISI 422 Stainless Steel
Both SAE-AISI 1144 steel and AISI 422 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 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 SAE-AISI 1144 steel and the bottom bar is AISI 422 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 to 230 | |
| 260 to 330 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 11 to 17 | |
| 15 to 17 |
| Fatigue Strength, MPa | 280 to 430 | |
| 410 to 500 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 34 to 40 | |
| 34 to 40 |
| Shear Modulus, GPa | 72 | |
| 76 |
| Shear Strength, MPa | 460 to 510 | |
| 560 to 660 |
| Tensile Strength: Ultimate (UTS), MPa | 750 to 840 | |
| 910 to 1080 |
| Tensile Strength: Yield (Proof), MPa | 420 to 690 | |
| 670 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 650 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1480 |
| Melting Onset (Solidus), °C | 1410 | |
| 1470 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 51 | |
| 24 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 4.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 5.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 3.1 |
| Embodied Energy, MJ/kg | 19 | |
| 44 |
| Embodied Water, L/kg | 47 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 to 110 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 480 to 1290 | |
| 1140 to 1910 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 27 to 30 | |
| 32 to 38 |
| Strength to Weight: Bending, points | 23 to 25 | |
| 26 to 30 |
| Thermal Diffusivity, mm2/s | 14 | |
| 6.4 |
| Thermal Shock Resistance, points | 22 to 24 | |
| 33 to 39 |
Alloy Composition
| Carbon (C), % | 0.4 to 0.48 | |
| 0.2 to 0.25 |
| Chromium (Cr), % | 0 | |
| 11 to 12.5 |
| Iron (Fe), % | 97.5 to 98 | |
| 81.9 to 85.8 |
| Manganese (Mn), % | 1.4 to 1.7 | |
| 0.5 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.9 to 1.3 |
| Nickel (Ni), % | 0 | |
| 0.5 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0.24 to 0.33 | |
| 0 to 0.025 |
| Tungsten (W), % | 0 | |
| 0.9 to 1.3 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.3 |