AISI 440A Stainless Steel vs. AISI 384 Stainless Steel
Both AISI 440A stainless steel and AISI 384 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is AISI 384 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 910 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1420 |
| Melting Onset (Solidus), °C | 1370 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 23 | |
| 16 |
| Thermal Expansion, µm/m-K | 10 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 20 |
| Density, g/cm3 | 7.7 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 3.7 |
| Embodied Energy, MJ/kg | 31 | |
| 52 |
| Embodied Water, L/kg | 120 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 16 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 17 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 17 |
| Thermal Diffusivity, mm2/s | 6.2 | |
| 4.3 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0.6 to 0.75 | |
| 0 to 0.040 |
| Chromium (Cr), % | 16 to 18 | |
| 15 to 17 |
| Iron (Fe), % | 78.4 to 83.4 | |
| 60.9 to 68 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 17 to 19 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |