EN 1.4903 +QT Steel vs. EN 1.4031 +QT800 Steel
Both EN 1.4903 +QT steel and EN 1.4031 +QT800 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a moderately high 95% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4903 +QT steel and the bottom bar is EN 1.4031 +QT800 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 21 | |
11 |
Fatigue Strength, MPa | 330 | |
400 |
Impact Strength: V-Notched Charpy, J | 46 | |
14 |
Poisson's Ratio | 0.28 | |
0.28 |
Shear Modulus, GPa | 75 | |
76 |
Shear Strength, MPa | 420 | |
540 |
Tensile Strength: Ultimate (UTS), MPa | 670 | |
900 |
Tensile Strength: Yield (Proof), MPa | 500 | |
730 |
Thermal Properties
Latent Heat of Fusion, J/g | 270 | |
280 |
Maximum Temperature: Corrosion, °C | 380 | |
390 |
Maximum Temperature: Mechanical, °C | 650 | |
770 |
Melting Completion (Liquidus), °C | 1460 | |
1440 |
Melting Onset (Solidus), °C | 1420 | |
1400 |
Specific Heat Capacity, J/kg-K | 470 | |
480 |
Thermal Conductivity, W/m-K | 26 | |
30 |
Thermal Expansion, µm/m-K | 11 | |
11 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
3.1 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 | |
3.7 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 7.0 | |
7.0 |
Density, g/cm3 | 7.8 | |
7.7 |
Embodied Carbon, kg CO2/kg material | 2.6 | |
1.9 |
Embodied Energy, MJ/kg | 36 | |
27 |
Embodied Water, L/kg | 88 | |
100 |
Common Calculations
PREN (Pitting Resistance) | 13 | |
14 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
94 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 650 | |
1360 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 24 | |
32 |
Strength to Weight: Bending, points | 22 | |
27 |
Thermal Diffusivity, mm2/s | 7.0 | |
8.1 |
Thermal Shock Resistance, points | 23 | |
32 |
Alloy Composition
Aluminum (Al), % | 0 to 0.040 | |
0 |
Carbon (C), % | 0.080 to 0.12 | |
0.36 to 0.42 |
Chromium (Cr), % | 8.0 to 9.5 | |
12.5 to 14.5 |
Copper (Cu), % | 0 to 0.3 | |
0 |
Iron (Fe), % | 87.1 to 90.5 | |
83 to 87.1 |
Manganese (Mn), % | 0.3 to 0.6 | |
0 to 1.0 |
Molybdenum (Mo), % | 0.85 to 1.1 | |
0 |
Nickel (Ni), % | 0 to 0.4 | |
0 |
Niobium (Nb), % | 0.060 to 0.1 | |
0 |
Nitrogen (N), % | 0.030 to 0.070 | |
0 |
Phosphorus (P), % | 0 to 0.025 | |
0 to 0.040 |
Silicon (Si), % | 0 to 0.5 | |
0 to 1.0 |
Sulfur (S), % | 0 to 0.015 | |
0 to 0.015 |
Vanadium (V), % | 0.18 to 0.25 | |
0 |