EN 1.6554 Steel vs. EN 1.7231 Steel
Both EN 1.6554 steel and EN 1.7231 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 1.6554 steel and the bottom bar is EN 1.7231 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 230 to 280 | |
| 240 to 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 17 to 21 | |
| 11 to 12 |
| Fatigue Strength, MPa | 380 to 520 | |
| 360 to 500 |
| Impact Strength: V-Notched Charpy, J | 30 to 45 | |
| 28 to 30 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 930 | |
| 790 to 930 |
| Tensile Strength: Yield (Proof), MPa | 550 to 790 | |
| 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 | 40 | |
| 46 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.4 | |
| 2.5 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 1.5 |
| Embodied Energy, MJ/kg | 22 | |
| 20 |
| Embodied Water, L/kg | 53 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 150 | |
| 87 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 810 to 1650 | |
| 870 to 1700 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 27 to 33 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 11 | |
| 12 |
| Thermal Shock Resistance, points | 23 to 27 | |
| 23 to 27 |
Alloy Composition
| Carbon (C), % | 0.23 to 0.28 | |
| 0.38 to 0.45 |
| Chromium (Cr), % | 0.7 to 0.9 | |
| 0.8 to 1.2 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 94.6 to 97.3 | |
| 96.4 to 98.1 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0.15 to 0.3 |
| Nickel (Ni), % | 1.0 to 2.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 to 0.030 | |
| 0 |