EN 1.6570 Steel vs. EN 1.6579 Steel
Both EN 1.6570 steel and EN 1.6579 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.6570 steel and the bottom bar is EN 1.6579 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 270 to 340 | |
| 260 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 11 to 14 |
| Fatigue Strength, MPa | 500 to 660 | |
| 380 to 570 |
| Impact Strength: V-Notched Charpy, J | 40 to 48 | |
| 35 to 41 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 910 to 1130 | |
| 850 to 980 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1060 | |
| 600 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 440 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 40 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 3.7 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 1.7 |
| Embodied Energy, MJ/kg | 23 | |
| 22 |
| Embodied Water, L/kg | 56 | |
| 56 |
Common Calculations
| PREN (Pitting Resistance) | 2.5 | |
| 2.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 140 | |
| 100 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1520 to 3010 | |
| 950 to 2210 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 40 | |
| 30 to 35 |
| Strength to Weight: Bending, points | 27 to 31 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 27 to 33 | |
| 25 to 29 |
Alloy Composition
| Carbon (C), % | 0.28 to 0.35 | |
| 0.32 to 0.38 |
| Chromium (Cr), % | 1.0 to 1.4 | |
| 1.4 to 1.7 |
| Iron (Fe), % | 94 to 96.2 | |
| 94.2 to 96.1 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0.3 to 0.5 | |
| 0.15 to 0.35 |
| Nickel (Ni), % | 1.6 to 2.1 | |
| 1.4 to 1.7 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |