EN 1.6579 Steel vs. AISI 440C Stainless Steel
Both EN 1.6579 steel and AISI 440C stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is EN 1.6579 steel and the bottom bar is AISI 440C stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 11 to 14 | |
| 2.0 to 14 |
| Fatigue Strength, MPa | 380 to 570 | |
| 260 to 840 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 850 to 980 | |
| 710 to 1970 |
| Tensile Strength: Yield (Proof), MPa | 600 to 910 | |
| 450 to 1900 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 870 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1410 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 39 | |
| 22 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 2.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.7 | |
| 9.0 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 2.2 |
| Embodied Energy, MJ/kg | 22 | |
| 31 |
| Embodied Water, L/kg | 56 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 2.4 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 120 | |
| 39 to 88 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 30 to 35 | |
| 26 to 71 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 23 to 46 |
| Thermal Diffusivity, mm2/s | 11 | |
| 6.0 |
| Thermal Shock Resistance, points | 25 to 29 | |
| 26 to 71 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.38 | |
| 1.0 to 1.2 |
| Chromium (Cr), % | 1.4 to 1.7 | |
| 16 to 18 |
| Iron (Fe), % | 94.2 to 96.1 | |
| 78 to 83.1 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.35 | |
| 0 to 0.75 |
| Nickel (Ni), % | 1.4 to 1.7 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |