EN 1.7709 Steel vs. EN 1.3538 Steel
Both EN 1.7709 steel and EN 1.3538 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.7709 steel and the bottom bar is EN 1.3538 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 230 | |
| 200 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 780 | |
| 670 to 740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 440 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 33 | |
| 41 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.4 | |
| 3.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.3 | |
| 1.6 |
| Embodied Energy, MJ/kg | 32 | |
| 21 |
| Embodied Water, L/kg | 56 | |
| 56 |
Common Calculations
| PREN (Pitting Resistance) | 3.6 | |
| 3.3 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 27 | |
| 24 to 26 |
| Strength to Weight: Bending, points | 21 to 24 | |
| 22 to 23 |
| Thermal Diffusivity, mm2/s | 8.9 | |
| 11 |
| Thermal Shock Resistance, points | 22 to 26 | |
| 20 to 22 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.030 | |
| 0 to 0.050 |
| Carbon (C), % | 0.17 to 0.25 | |
| 0.93 to 1.1 |
| Chromium (Cr), % | 1.2 to 1.5 | |
| 1.7 to 2.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 95.2 to 97.5 | |
| 96 to 97.2 |
| Manganese (Mn), % | 0.4 to 0.8 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 0.55 to 0.8 | |
| 0.4 to 0.5 |
| Nickel (Ni), % | 0 to 0.6 | |
| 0 |
| Oxygen (O), % | 0 | |
| 0 to 0.0015 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.2 to 0.35 | |
| 0 |