EN 1.7336 +QT Steel vs. EN 1.7703 +QT Steel
Both EN 1.7336 +QT steel and EN 1.7703 +QT steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.7336 +QT steel and the bottom bar is EN 1.7703 +QT steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 22 | |
| 20 |
| Fatigue Strength, MPa | 310 | |
| 320 |
| Impact Strength: V-Notched Charpy, J | 46 | |
| 46 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 74 |
| Shear Strength, MPa | 370 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 590 | |
| 670 |
| Tensile Strength: Yield (Proof), MPa | 440 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 460 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| 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 | 7.5 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.1 | |
| 4.2 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 2.5 |
| Embodied Energy, MJ/kg | 21 | |
| 35 |
| Embodied Water, L/kg | 53 | |
| 61 |
Common Calculations
| PREN (Pitting Resistance) | 3.2 | |
| 5.6 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 570 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 21 | |
| 24 |
| Strength to Weight: Bending, points | 20 | |
| 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 17 | |
| 19 |
Alloy Composition
| Carbon (C), % | 0 to 0.17 | |
| 0.11 to 0.15 |
| Chromium (Cr), % | 1.0 to 1.5 | |
| 2.0 to 2.5 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 to 0.2 |
| Iron (Fe), % | 95.6 to 97.7 | |
| 94.6 to 96.4 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.45 to 0.65 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 to 0.25 |
| Niobium (Nb), % | 0 | |
| 0 to 0.070 |
| Nitrogen (N), % | 0 to 0.012 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.5 to 0.8 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Titanium (Ti), % | 0 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.35 |