EN 1.7380 +QT Steel vs. EN 1.8522 +QT Steel
Both EN 1.7380 +QT steel and EN 1.8522 +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 1.7380 +QT steel and the bottom bar is EN 1.8522 +QT steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 | |
| 380 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 19 | |
| 13 |
| Fatigue Strength, MPa | 200 | |
| 680 |
| Impact Strength: V-Notched Charpy, J | 31 | |
| 34 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 74 |
| Shear Strength, MPa | 330 | |
| 750 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 1250 |
| Tensile Strength: Yield (Proof), MPa | 290 | |
| 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 460 | |
| 470 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| 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 | 7.6 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.8 | |
| 4.2 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 2.2 |
| Embodied Energy, MJ/kg | 23 | |
| 31 |
| Embodied Water, L/kg | 59 | |
| 63 |
Common Calculations
| PREN (Pitting Resistance) | 5.6 | |
| 6.2 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 | |
| 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 230 | |
| 3090 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 19 | |
| 44 |
| Strength to Weight: Bending, points | 19 | |
| 33 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 15 | |
| 36 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.14 | |
| 0.29 to 0.36 |
| Chromium (Cr), % | 2.0 to 2.5 | |
| 2.8 to 3.3 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 to 0.1 |
| Iron (Fe), % | 94.6 to 96.6 | |
| 93.7 to 96 |
| Manganese (Mn), % | 0.4 to 0.8 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0.7 to 1.2 |
| Nickel (Ni), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 to 0.012 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.035 |
| Vanadium (V), % | 0 | |
| 0.15 to 0.25 |