Hardened AISI 440C vs. EN 1.4125 Stainless Steel
Both hardened AISI 440C and EN 1.4125 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is hardened AISI 440C and the bottom bar is EN 1.4125 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 2.0 | |
| 19 |
| Fatigue Strength, MPa | 840 | |
| 300 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 76 | |
| 77 |
| Shear Strength, MPa | 1120 | |
| 500 |
| Tensile Strength: Ultimate (UTS), MPa | 1970 | |
| 800 |
| Tensile Strength: Yield (Proof), MPa | 1900 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 870 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1430 |
| Melting Onset (Solidus), °C | 1370 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 22 | |
| 15 |
| Thermal Expansion, µm/m-K | 10 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 9.0 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 2.3 |
| Embodied Energy, MJ/kg | 31 | |
| 32 |
| Embodied Water, L/kg | 120 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 39 | |
| 130 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 71 | |
| 29 |
| Strength to Weight: Bending, points | 46 | |
| 25 |
| Thermal Diffusivity, mm2/s | 6.0 | |
| 4.1 |
| Thermal Shock Resistance, points | 71 | |
| 29 |
Alloy Composition
| Carbon (C), % | 1.0 to 1.2 | |
| 1.0 to 1.2 |
| Chromium (Cr), % | 16 to 18 | |
| 16 to 18 |
| Iron (Fe), % | 78 to 83.1 | |
| 78 to 82.7 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0.4 to 0.8 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |