EN 1.6582 +QT Steel vs. EN 1.7709 +QT Steel
Both EN 1.6582 +QT steel and EN 1.7709 +QT steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 99% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.6582 +QT steel and the bottom bar is EN 1.7709 +QT steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 300 | |
| 230 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 18 |
| Fatigue Strength, MPa | 550 | |
| 410 |
| Impact Strength: V-Notched Charpy, J | 42 | |
| 71 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 46 | |
| 68 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 610 | |
| 480 |
| Tensile Strength: Ultimate (UTS), MPa | 1010 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 870 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 440 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 40 | |
| 33 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.6 | |
| 3.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 2.3 |
| Embodied Energy, MJ/kg | 22 | |
| 32 |
| Embodied Water, L/kg | 56 | |
| 56 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 3.6 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2000 | |
| 1000 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 36 | |
| 27 |
| Strength to Weight: Bending, points | 28 | |
| 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 8.9 |
| Thermal Shock Resistance, points | 30 | |
| 26 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.030 |
| Carbon (C), % | 0.3 to 0.38 | |
| 0.17 to 0.25 |
| Chromium (Cr), % | 1.3 to 1.7 | |
| 1.2 to 1.5 |
| Iron (Fe), % | 94.7 to 96.5 | |
| 95.2 to 97.5 |
| Manganese (Mn), % | 0.5 to 0.8 | |
| 0.4 to 0.8 |
| Molybdenum (Mo), % | 0.15 to 0.3 | |
| 0.55 to 0.8 |
| Nickel (Ni), % | 1.3 to 1.7 | |
| 0 to 0.6 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.035 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.35 |