EN 1.6781 Steel vs. EN 1.1221 Steel
Both EN 1.6781 steel and EN 1.1221 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 30 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 1.6781 steel and the bottom bar is EN 1.1221 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 | |
| 210 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 17 | |
| 10 to 21 |
| Fatigue Strength, MPa | 450 | |
| 240 to 340 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 830 | |
| 730 to 870 |
| Tensile Strength: Yield (Proof), MPa | 680 | |
| 390 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 450 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 44 | |
| 48 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.9 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 5.0 | |
| 2.1 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 1.5 |
| Embodied Energy, MJ/kg | 25 | |
| 19 |
| Embodied Water, L/kg | 60 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 67 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1220 | |
| 410 to 800 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 | |
| 26 to 31 |
| Strength to Weight: Bending, points | 25 | |
| 23 to 26 |
| Thermal Diffusivity, mm2/s | 12 | |
| 13 |
| Thermal Shock Resistance, points | 24 | |
| 23 to 28 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.19 | |
| 0.57 to 0.65 |
| Chromium (Cr), % | 1.3 to 1.8 | |
| 0 to 0.4 |
| Iron (Fe), % | 92.6 to 94.6 | |
| 97.1 to 98.8 |
| Manganese (Mn), % | 0.55 to 0.8 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0 to 0.1 |
| Nickel (Ni), % | 3.0 to 3.5 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.035 |