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EN 1.3521 Steel vs. EN 1.6781 Steel

Both EN 1.3521 steel and EN 1.6781 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 (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.3521 steel and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 490 to 1390
830

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 420
450
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 45
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 19
25
Embodied Water, L/kg 52
60

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 49
29
Strength to Weight: Bending, points 18 to 35
25
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 14 to 41
24

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Carbon (C), % 0.14 to 0.19
0.15 to 0.19
Chromium (Cr), % 0.8 to 1.1
1.3 to 1.8
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 96.8 to 98.2
92.6 to 94.6
Manganese (Mn), % 1.0 to 1.3
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 0
3.0 to 3.5
Oxygen (O), % 0 to 0.0020
0
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015