EN 1.1158 Steel vs. EN 1.1191 Steel
Both EN 1.1158 steel and EN 1.1191 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.1158 steel and the bottom bar is EN 1.1191 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 150 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 23 to 24 | |
| 16 to 17 |
| Fatigue Strength, MPa | 170 to 220 | |
| 210 to 290 |
| Impact Strength: V-Notched Charpy, J | 28 to 40 | |
| 16 to 29 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 300 to 320 | |
| 380 to 430 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 500 | |
| 630 to 700 |
| Tensile Strength: Yield (Proof), MPa | 240 to 310 | |
| 310 to 440 |
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 | 49 | |
| 48 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 | |
| 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 | 1.4 | |
| 1.4 |
| Embodied Energy, MJ/kg | 19 | |
| 19 |
| Embodied Water, L/kg | 47 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 89 to 110 | |
| 83 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 250 | |
| 260 to 510 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 to 18 | |
| 22 to 25 |
| Strength to Weight: Bending, points | 17 to 18 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 13 |
| Thermal Shock Resistance, points | 15 to 16 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0.22 to 0.29 | |
| 0.42 to 0.5 |
| Chromium (Cr), % | 0 to 0.4 | |
| 0 to 0.4 |
| Iron (Fe), % | 97.6 to 99.38 | |
| 97.3 to 99.08 |
| Manganese (Mn), % | 0.4 to 0.7 | |
| 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 |