ASTM A387 Grade 22 Steel vs. AISI 440B Stainless Steel
Both ASTM A387 grade 22 steel and AISI 440B stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 30 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 ASTM A387 grade 22 steel and the bottom bar is AISI 440B stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 21 | |
| 3.0 to 18 |
| Fatigue Strength, MPa | 160 to 240 | |
| 260 to 850 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 74 | |
| 77 |
| Shear Strength, MPa | 300 to 380 | |
| 460 to 1110 |
| Tensile Strength: Ultimate (UTS), MPa | 480 to 600 | |
| 740 to 1930 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 430 to 1860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 460 | |
| 870 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1480 |
| Melting Onset (Solidus), °C | 1430 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 40 | |
| 23 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.8 | |
| 9.0 |
| Density, g/cm3 | 7.9 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 2.2 |
| Embodied Energy, MJ/kg | 23 | |
| 31 |
| Embodied Water, L/kg | 58 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 5.6 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 85 to 110 | |
| 57 to 110 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 17 to 21 | |
| 27 to 70 |
| Strength to Weight: Bending, points | 17 to 20 | |
| 24 to 45 |
| Thermal Diffusivity, mm2/s | 11 | |
| 6.1 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 27 to 70 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0.75 to 1.0 |
| Chromium (Cr), % | 2.0 to 2.5 | |
| 16 to 18 |
| Iron (Fe), % | 95.1 to 96.8 | |
| 78.2 to 83.3 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 to 0.75 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.015 |