EN 1.1181 Steel vs. EN 1.1158 Steel
Both EN 1.1181 steel and EN 1.1158 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1181 steel and the bottom bar is EN 1.1158 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 180 | |
| 140 to 150 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 to 20 | |
| 23 to 24 |
| Fatigue Strength, MPa | 190 to 260 | |
| 170 to 220 |
| Impact Strength: V-Notched Charpy, J | 23 to 38 | |
| 28 to 40 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 350 to 390 | |
| 300 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 560 to 620 | |
| 470 to 500 |
| Tensile Strength: Yield (Proof), MPa | 280 to 380 | |
| 240 to 310 |
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 | 42 | |
| 49 |
| Thermal Expansion, µm/m-K | 11 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 19 |
| Embodied Water, L/kg | 47 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 to 110 | |
| 89 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 380 | |
| 150 to 250 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 22 | |
| 17 to 18 |
| Strength to Weight: Bending, points | 19 to 21 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 11 | |
| 13 |
| Thermal Shock Resistance, points | 19 to 21 | |
| 15 to 16 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.39 | |
| 0.22 to 0.29 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0 to 0.4 |
| Iron (Fe), % | 97.4 to 99.18 | |
| 97.6 to 99.38 |
| Manganese (Mn), % | 0.5 to 0.8 | |
| 0.4 to 0.7 |
| 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 |