EN 1.7725 Steel vs. EN 1.7230 Steel
Both EN 1.7725 steel and EN 1.7230 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is EN 1.7230 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 to 300 | |
| 220 to 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 11 to 12 |
| Fatigue Strength, MPa | 390 to 550 | |
| 320 to 460 |
| Impact Strength: V-Notched Charpy, J | 34 to 35 | |
| 29 to 30 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1000 | |
| 720 to 910 |
| Tensile Strength: Yield (Proof), MPa | 610 to 860 | |
| 510 to 740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 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 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 2.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.5 |
| Embodied Energy, MJ/kg | 24 | |
| 20 |
| Embodied Water, L/kg | 54 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 130 | |
| 79 to 97 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 980 to 1940 | |
| 700 to 1460 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 to 35 | |
| 26 to 32 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 23 to 27 |
| Thermal Diffusivity, mm2/s | 11 | |
| 12 |
| Thermal Shock Resistance, points | 24 to 29 | |
| 21 to 27 |
Alloy Composition
| Carbon (C), % | 0.27 to 0.34 | |
| 0.3 to 0.37 |
| Chromium (Cr), % | 1.3 to 1.7 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 95.7 to 97.5 | |
| 96.7 to 98.3 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0.3 to 0.5 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Vanadium (V), % | 0.050 to 0.15 | |
| 0 |