EN 1.7709 Steel vs. EN 1.8522 Steel
Both EN 1.7709 steel and EN 1.8522 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 1.7709 steel and the bottom bar is EN 1.8522 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 230 | |
| 220 to 380 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 650 to 780 | |
| 730 to 1250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 470 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 33 | |
| 39 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.4 | |
| 4.2 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.3 | |
| 2.2 |
| Embodied Energy, MJ/kg | 32 | |
| 31 |
| Embodied Water, L/kg | 56 | |
| 63 |
Common Calculations
| PREN (Pitting Resistance) | 3.6 | |
| 6.2 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 27 | |
| 26 to 44 |
| Strength to Weight: Bending, points | 21 to 24 | |
| 23 to 33 |
| Thermal Diffusivity, mm2/s | 8.9 | |
| 11 |
| Thermal Shock Resistance, points | 22 to 26 | |
| 21 to 36 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.030 | |
| 0 |
| Carbon (C), % | 0.17 to 0.25 | |
| 0.29 to 0.36 |
| Chromium (Cr), % | 1.2 to 1.5 | |
| 2.8 to 3.3 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Iron (Fe), % | 95.2 to 97.5 | |
| 93.7 to 96 |
| Manganese (Mn), % | 0.4 to 0.8 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0.55 to 0.8 | |
| 0.7 to 1.2 |
| Nickel (Ni), % | 0 to 0.6 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.035 |
| Vanadium (V), % | 0.2 to 0.35 | |
| 0.15 to 0.25 |