EN 1.7779 Steel vs. EN 1.4415 Stainless Steel
Both EN 1.7779 steel and EN 1.4415 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 32 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 EN 1.7779 steel and the bottom bar is EN 1.4415 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 16 | |
| 17 to 20 |
| Fatigue Strength, MPa | 430 | |
| 470 to 510 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 91 to 110 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Shear Strength, MPa | 500 | |
| 520 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 810 | |
| 830 to 930 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 730 to 840 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 790 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 19 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 2.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 13 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.6 |
| Embodied Energy, MJ/kg | 41 | |
| 51 |
| Embodied Water, L/kg | 64 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 5.0 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 150 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1150 | |
| 1350 to 1790 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 | |
| 29 to 33 |
| Strength to Weight: Bending, points | 25 | |
| 25 to 27 |
| Thermal Diffusivity, mm2/s | 11 | |
| 5.1 |
| Thermal Shock Resistance, points | 23 | |
| 30 to 34 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 |
| Carbon (C), % | 0.17 to 0.23 | |
| 0 to 0.030 |
| Chromium (Cr), % | 3.0 to 3.3 | |
| 11.5 to 13.5 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 93.8 to 95.4 | |
| 75.9 to 82.4 |
| Manganese (Mn), % | 0.3 to 0.5 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 0.5 to 0.6 | |
| 1.5 to 2.5 |
| Nickel (Ni), % | 0 to 0.3 | |
| 4.5 to 6.5 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Vanadium (V), % | 0.45 to 0.55 | |
| 0.1 to 0.5 |