EN 1.4107 +QT1 Steel vs. EN 1.4107 +QT2 Steel
Both EN 1.4107 +QT1 steel and EN 1.4107 +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 1.4107 +QT1 steel and the bottom bar is EN 1.4107 +QT2 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 21 | |
18 |
Fatigue Strength, MPa | 260 | |
350 |
Impact Strength: V-Notched Charpy, J | 50 | |
45 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 76 | |
76 |
Tensile Strength: Ultimate (UTS), MPa | 620 | |
700 |
Tensile Strength: Yield (Proof), MPa | 400 | |
570 |
Thermal Properties
Latent Heat of Fusion, J/g | 270 | |
270 |
Maximum Temperature: Corrosion, °C | 390 | |
390 |
Maximum Temperature: Mechanical, °C | 740 | |
740 |
Melting Completion (Liquidus), °C | 1450 | |
1450 |
Melting Onset (Solidus), °C | 1410 | |
1410 |
Specific Heat Capacity, J/kg-K | 480 | |
480 |
Thermal Conductivity, W/m-K | 27 | |
27 |
Thermal Expansion, µm/m-K | 10 | |
10 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
2.9 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
3.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 7.5 | |
7.5 |
Density, g/cm3 | 7.8 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.1 | |
2.1 |
Embodied Energy, MJ/kg | 30 | |
30 |
Embodied Water, L/kg | 100 | |
100 |
Common Calculations
PREN (Pitting Resistance) | 13 | |
13 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 420 | |
840 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 22 | |
25 |
Strength to Weight: Bending, points | 21 | |
22 |
Thermal Diffusivity, mm2/s | 7.2 | |
7.2 |
Thermal Shock Resistance, points | 22 | |
25 |
Alloy Composition
Carbon (C), % | 0 to 0.1 | |
0 to 0.1 |
Chromium (Cr), % | 11.5 to 12.5 | |
11.5 to 12.5 |
Copper (Cu), % | 0 to 0.3 | |
0 to 0.3 |
Iron (Fe), % | 83.8 to 87.2 | |
83.8 to 87.2 |
Manganese (Mn), % | 0.5 to 0.8 | |
0.5 to 0.8 |
Molybdenum (Mo), % | 0 to 0.5 | |
0 to 0.5 |
Nickel (Ni), % | 0.8 to 1.5 | |
0.8 to 1.5 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0 to 0.4 | |
0 to 0.4 |
Sulfur (S), % | 0 to 0.020 | |
0 to 0.020 |
Vanadium (V), % | 0 to 0.080 | |
0 to 0.080 |