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R31539 Cobalt vs. EN 1.3518 Steel

R31539 cobalt belongs to the cobalt alloys classification, while EN 1.3518 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is EN 1.3518 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
72
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
630

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
1440
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
43
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 530
51

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
23
Strength to Weight: Bending, points 27 to 32
21
Thermal Diffusivity, mm2/s 3.5
12
Thermal Shock Resistance, points 24 to 32
19

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0 to 0.050
Carbon (C), % 0 to 0.14
0.93 to 1.1
Chromium (Cr), % 26 to 30
0.9 to 1.2
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 0.75
96.3 to 97.8
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.9 to 1.2
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.1
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 1.0
0.45 to 0.75
Sulfur (S), % 0
0 to 0.030