AISI 440A Stainless Steel vs. ASTM A204 Steel
Both AISI 440A stainless steel and ASTM A204 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 A204 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 5.0 to 20 | |
| 18 to 22 |
| Fatigue Strength, MPa | 270 to 790 | |
| 200 to 220 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 450 to 1040 | |
| 330 to 360 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 520 to 590 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 290 to 330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 410 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1470 |
| Melting Onset (Solidus), °C | 1370 | |
| 1420 to 1430 |
| 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 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 2.4 |
| Density, g/cm3 | 7.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 1.5 |
| Embodied Energy, MJ/kg | 31 | |
| 20 |
| Embodied Water, L/kg | 120 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 90 to 95 |
| 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 |