EN 1.8151 Steel vs. EN 1.7139 Steel
Both EN 1.8151 steel and EN 1.7139 steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.8151 steel and the bottom bar is EN 1.7139 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 540 | |
| 150 to 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 1940 | |
| 480 to 1390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 420 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 50 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.2 | |
| 2.2 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.4 |
| Embodied Energy, MJ/kg | 25 | |
| 19 |
| Embodied Water, L/kg | 49 | |
| 51 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 24 to 70 | |
| 17 to 49 |
| Strength to Weight: Bending, points | 22 to 45 | |
| 17 to 35 |
| Thermal Diffusivity, mm2/s | 14 | |
| 12 |
| Thermal Shock Resistance, points | 20 to 58 | |
| 14 to 41 |
Alloy Composition
| Carbon (C), % | 0.4 to 0.5 | |
| 0.14 to 0.19 |
| Chromium (Cr), % | 0.4 to 0.8 | |
| 0.8 to 1.1 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 95.9 to 97.2 | |
| 96.8 to 98 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 1.0 to 1.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 1.3 to 1.7 | |
| 0 to 0.3 |
| Sulfur (S), % | 0 to 0.025 | |
| 0.020 to 0.040 |
| Vanadium (V), % | 0.1 to 0.2 | |
| 0 |