EN 1.6771 Steel vs. EN 1.7231 Steel
Both EN 1.6771 steel and EN 1.7231 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.6771 steel and the bottom bar is EN 1.7231 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 280 to 350 | |
240 to 280 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
190 |
Elongation at Break, % | 8.0 to 8.7 | |
11 to 12 |
Fatigue Strength, MPa | 440 to 680 | |
360 to 500 |
Impact Strength: V-Notched Charpy, J | 20 to 32 | |
28 to 30 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 73 | |
73 |
Tensile Strength: Ultimate (UTS), MPa | 930 to 1180 | |
790 to 930 |
Tensile Strength: Yield (Proof), MPa | 740 to 1140 | |
570 to 800 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
250 |
Maximum Temperature: Mechanical, °C | 440 | |
420 |
Melting Completion (Liquidus), °C | 1460 | |
1460 |
Melting Onset (Solidus), °C | 1420 | |
1420 |
Specific Heat Capacity, J/kg-K | 470 | |
470 |
Thermal Conductivity, W/m-K | 46 | |
46 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 8.0 | |
7.3 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 9.2 | |
8.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 5.0 | |
2.5 |
Density, g/cm3 | 7.9 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 1.9 | |
1.5 |
Embodied Energy, MJ/kg | 25 | |
20 |
Embodied Water, L/kg | 58 | |
51 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 75 to 93 | |
87 to 100 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 1460 to 3450 | |
870 to 1700 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 33 to 41 | |
28 to 33 |
Strength to Weight: Bending, points | 27 to 31 | |
24 to 27 |
Thermal Diffusivity, mm2/s | 13 | |
12 |
Thermal Shock Resistance, points | 27 to 35 | |
23 to 27 |
Alloy Composition
Carbon (C), % | 0.27 to 0.33 | |
0.38 to 0.45 |
Chromium (Cr), % | 0.8 to 1.2 | |
0.8 to 1.2 |
Iron (Fe), % | 92.2 to 95 | |
96.4 to 98.1 |
Manganese (Mn), % | 0.6 to 1.0 | |
0.6 to 1.0 |
Molybdenum (Mo), % | 0.3 to 0.6 | |
0.15 to 0.3 |
Nickel (Ni), % | 3.0 to 4.0 | |
0 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.025 |
Silicon (Si), % | 0 to 0.6 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.020 | |
0 to 0.030 |