EN 1.8151 +H Steel vs. Hardened SAE-AISI S4
Both EN 1.8151 +H steel and hardened SAE-AISI S4 are iron alloys. Both are furnished in the hardened (H) condition. Their average alloy composition is basically identical. There are 24 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.8151 +H steel and the bottom bar is hardened SAE-AISI S4.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Rockwell C Hardness | 60 | |
| 66 |
| Shear Modulus, GPa | 72 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 1940 | |
| 2140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1430 |
| Melting Onset (Solidus), °C | 1400 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 50 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.2 | |
| 2.2 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 2.0 |
| Embodied Energy, MJ/kg | 25 | |
| 29 |
| Embodied Water, L/kg | 49 | |
| 48 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 70 | |
| 77 |
| Strength to Weight: Bending, points | 45 | |
| 48 |
| Thermal Diffusivity, mm2/s | 14 | |
| 12 |
| Thermal Shock Resistance, points | 58 | |
| 65 |
Alloy Composition
| Carbon (C), % | 0.4 to 0.5 | |
| 0.5 to 0.65 |
| Chromium (Cr), % | 0.4 to 0.8 | |
| 0.1 to 0.5 |
| Iron (Fe), % | 95.9 to 97.2 | |
| 95.2 to 96.9 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0.6 to 1.0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.030 |
| Silicon (Si), % | 1.3 to 1.7 | |
| 1.8 to 2.3 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.1 to 0.2 | |
| 0.15 to 0.35 |