EN 1.6579 Steel vs. EN 1.7703 Steel
Both EN 1.6579 steel and EN 1.7703 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 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 1.6579 steel and the bottom bar is EN 1.7703 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 260 to 290 | |
| 200 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 14 | |
| 20 |
| Fatigue Strength, MPa | 380 to 570 | |
| 320 to 340 |
| Impact Strength: V-Notched Charpy, J | 35 to 41 | |
| 46 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 850 to 980 | |
| 670 to 690 |
| Tensile Strength: Yield (Proof), MPa | 600 to 910 | |
| 460 to 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 460 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1410 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.7 | |
| 4.2 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 2.5 |
| Embodied Energy, MJ/kg | 22 | |
| 35 |
| Embodied Water, L/kg | 56 | |
| 61 |
Common Calculations
| PREN (Pitting Resistance) | 2.4 | |
| 5.6 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 120 | |
| 120 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 950 to 2210 | |
| 570 to 650 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 30 to 35 | |
| 24 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 25 to 29 | |
| 19 to 20 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.38 | |
| 0.11 to 0.15 |
| Chromium (Cr), % | 1.4 to 1.7 | |
| 2.0 to 2.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 94.2 to 96.1 | |
| 94.6 to 96.4 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.15 to 0.35 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 1.4 to 1.7 | |
| 0 to 0.25 |
| Niobium (Nb), % | 0 | |
| 0 to 0.070 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0050 |
| Titanium (Ti), % | 0 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.35 |