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EN 1.6771 Steel vs. EN 1.8151 Steel

Both EN 1.6771 steel and EN 1.8151 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 1.8151 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 350
200 to 540
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 930 to 1180
670 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 440
410
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 46
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.2
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.9
1.8
Embodied Energy, MJ/kg 25
25
Embodied Water, L/kg 58
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 41
24 to 70
Strength to Weight: Bending, points 27 to 31
22 to 45
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 27 to 35
20 to 58

Alloy Composition

Carbon (C), % 0.27 to 0.33
0.4 to 0.5
Chromium (Cr), % 0.8 to 1.2
0.4 to 0.8
Iron (Fe), % 92.2 to 95
95.9 to 97.2
Manganese (Mn), % 0.6 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 0.3 to 0.6
0
Nickel (Ni), % 3.0 to 4.0
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.6
1.3 to 1.7
Sulfur (S), % 0 to 0.020
0 to 0.025
Vanadium (V), % 0
0.1 to 0.2