EN 1.7725 Steel vs. EN 1.1170 Steel
Both EN 1.7725 steel and EN 1.1170 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.1170 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 250 to 300 | |
| 180 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 16 to 17 |
| Fatigue Strength, MPa | 390 to 550 | |
| 220 to 330 |
| Impact Strength: V-Notched Charpy, J | 34 to 35 | |
| 28 to 35 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1000 | |
| 640 to 730 |
| Tensile Strength: Yield (Proof), MPa | 610 to 860 | |
| 330 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 400 |
| 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 | |
| 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
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 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.5 |
| Embodied Energy, MJ/kg | 24 | |
| 19 |
| Embodied Water, L/kg | 54 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 130 | |
| 91 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 980 to 1940 | |
| 290 to 670 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 to 35 | |
| 23 to 26 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 21 to 23 |
| Thermal Diffusivity, mm2/s | 11 | |
| 13 |
| Thermal Shock Resistance, points | 24 to 29 | |
| 20 to 23 |
Alloy Composition
| Carbon (C), % | 0.27 to 0.34 | |
| 0.25 to 0.32 |
| Chromium (Cr), % | 1.3 to 1.7 | |
| 0 to 0.4 |
| Iron (Fe), % | 95.7 to 97.5 | |
| 96.7 to 98.5 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 1.3 to 1.7 |
| Molybdenum (Mo), % | 0.3 to 0.5 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.035 |
| Vanadium (V), % | 0.050 to 0.15 | |
| 0 |