EN 1.1170 Steel vs. EN 1.1181 Steel
Both EN 1.1170 steel and EN 1.1181 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1170 steel and the bottom bar is EN 1.1181 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 210 | |
| 160 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 to 17 | |
| 19 to 20 |
| Fatigue Strength, MPa | 220 to 330 | |
| 190 to 260 |
| Impact Strength: V-Notched Charpy, J | 28 to 35 | |
| 23 to 38 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 390 to 450 | |
| 350 to 390 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 730 | |
| 560 to 620 |
| Tensile Strength: Yield (Proof), MPa | 330 to 500 | |
| 280 to 380 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 400 |
| 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 | 50 | |
| 42 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 19 |
| Embodied Water, L/kg | 49 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 91 to 100 | |
| 90 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 to 670 | |
| 210 to 380 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 26 | |
| 20 to 22 |
| Strength to Weight: Bending, points | 21 to 23 | |
| 19 to 21 |
| Thermal Diffusivity, mm2/s | 13 | |
| 11 |
| Thermal Shock Resistance, points | 20 to 23 | |
| 19 to 21 |
Alloy Composition
| Carbon (C), % | 0.25 to 0.32 | |
| 0.32 to 0.39 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0 to 0.4 |
| Iron (Fe), % | 96.7 to 98.5 | |
| 97.4 to 99.18 |
| Manganese (Mn), % | 1.3 to 1.7 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0 to 0.1 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.035 |