AISI 440A Stainless Steel vs. ASTM A203 Steel
Both AISI 440A stainless steel and ASTM A203 steel are iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is ASTM A203 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 5.0 to 20 | |
| 22 to 26 |
| Fatigue Strength, MPa | 270 to 790 | |
| 210 to 280 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 450 to 1040 | |
| 330 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 520 to 590 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 290 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 410 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1460 |
| Melting Onset (Solidus), °C | 1370 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 23 | |
| 52 |
| Thermal Expansion, µm/m-K | 10 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 7.4 to 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.5 to 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 3.2 to 4.0 |
| Density, g/cm3 | 7.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 1.6 to 1.7 |
| Embodied Energy, MJ/kg | 31 | |
| 21 to 23 |
| Embodied Water, L/kg | 120 | |
| 50 to 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 110 to 120 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 18 to 20 |
| Thermal Diffusivity, mm2/s | 6.2 | |
| 14 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 15 to 17 |