EN 1.7710 +QT1 Steel vs. EN 1.7710 +QT2 Steel
Both EN 1.7710 +QT1 steel and EN 1.7710 +QT2 steel are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is EN 1.7710 +QT1 steel and the bottom bar is EN 1.7710 +QT2 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 280 | |
320 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 11 | |
6.8 |
Fatigue Strength, MPa | 500 | |
620 |
Impact Strength: V-Notched Charpy, J | 30 | |
30 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 930 | |
1070 |
Tensile Strength: Yield (Proof), MPa | 800 | |
1060 |
Thermal Properties
Latent Heat of Fusion, J/g | 260 | |
260 |
Maximum Temperature: Mechanical, °C | 440 | |
440 |
Melting Completion (Liquidus), °C | 1470 | |
1470 |
Melting Onset (Solidus), °C | 1430 | |
1430 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 41 | |
41 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
7.5 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
8.6 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 3.5 | |
3.5 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.2 | |
2.2 |
Embodied Energy, MJ/kg | 30 | |
30 |
Embodied Water, L/kg | 57 | |
57 |
Common Calculations
PREN (Pitting Resistance) | 4.5 | |
4.5 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 | |
73 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1680 | |
2970 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 33 | |
38 |
Strength to Weight: Bending, points | 27 | |
30 |
Thermal Diffusivity, mm2/s | 11 | |
11 |
Thermal Shock Resistance, points | 27 | |
31 |
Alloy Composition
Carbon (C), % | 0.12 to 0.18 | |
0.12 to 0.18 |
Chromium (Cr), % | 1.3 to 1.8 | |
1.3 to 1.8 |
Iron (Fe), % | 95.1 to 97 | |
95.1 to 97 |
Manganese (Mn), % | 0.6 to 1.0 | |
0.6 to 1.0 |
Molybdenum (Mo), % | 0.8 to 1.0 | |
0.8 to 1.0 |
Phosphorus (P), % | 0 to 0.025 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.6 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Vanadium (V), % | 0.15 to 0.25 | |
0.15 to 0.25 |