EN 1.3551 Steel vs. EN 1.7709 Steel
Both EN 1.3551 steel and EN 1.7709 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.3551 steel and the bottom bar is EN 1.7709 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 200 to 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 720 | |
| 650 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 530 | |
| 440 |
| Melting Completion (Liquidus), °C | 1490 | |
| 1470 |
| Melting Onset (Solidus), °C | 1450 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 470 |
| Thermal Conductivity, W/m-K | 36 | |
| 33 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.6 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.9 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 3.4 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 4.9 | |
| 2.3 |
| Embodied Energy, MJ/kg | 71 | |
| 32 |
| Embodied Water, L/kg | 82 | |
| 56 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 3.6 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 26 | |
| 23 to 27 |
| Strength to Weight: Bending, points | 23 | |
| 21 to 24 |
| Thermal Diffusivity, mm2/s | 9.8 | |
| 8.9 |
| Thermal Shock Resistance, points | 21 | |
| 22 to 26 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.030 |
| Carbon (C), % | 0.77 to 0.85 | |
| 0.17 to 0.25 |
| Chromium (Cr), % | 3.9 to 4.3 | |
| 1.2 to 1.5 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 88.8 to 91.1 | |
| 95.2 to 97.5 |
| Manganese (Mn), % | 0.15 to 0.35 | |
| 0.4 to 0.8 |
| Molybdenum (Mo), % | 4.0 to 4.5 | |
| 0.55 to 0.8 |
| Nickel (Ni), % | 0 | |
| 0 to 0.6 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 to 0.25 | |
| 0 |
| Vanadium (V), % | 0.9 to 1.1 | |
| 0.2 to 0.35 |