EN 1.6553 Steel vs. EN 1.7231 Steel
Both EN 1.6553 steel and EN 1.7231 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.6553 steel and the bottom bar is EN 1.7231 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 240 | |
| 240 to 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 to 21 | |
| 11 to 12 |
| Fatigue Strength, MPa | 330 to 460 | |
| 360 to 500 |
| Impact Strength: V-Notched Charpy, J | 30 | |
| 28 to 30 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 710 to 800 | |
| 790 to 930 |
| Tensile Strength: Yield (Proof), MPa | 470 to 670 | |
| 570 to 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 420 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 46 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.7 | |
| 2.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 | |
| 20 |
| Embodied Water, L/kg | 51 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 150 | |
| 87 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 1190 | |
| 870 to 1700 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 25 to 28 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 23 to 24 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 10 | |
| 12 |
| Thermal Shock Resistance, points | 21 to 23 | |
| 23 to 27 |
Alloy Composition
| Carbon (C), % | 0.23 to 0.28 | |
| 0.38 to 0.45 |
| Chromium (Cr), % | 0.4 to 0.8 | |
| 0.8 to 1.2 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 95.6 to 98.2 | |
| 96.4 to 98.1 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.3 | |
| 0.15 to 0.3 |
| Nickel (Ni), % | 0.4 to 0.8 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.8 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 to 0.030 | |
| 0 |