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R30021 Cobalt vs. EN 1.5536 Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.5536 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.5536 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
73
Tensile Strength: Ultimate (UTS), MPa 700
460 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Melting Completion (Liquidus), °C 1350
1460
Melting Onset (Solidus), °C 1190
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
49
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 520
48

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
16 to 57
Strength to Weight: Bending, points 21
17 to 39
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 21
14 to 47

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.2 to 0.35
0.25 to 0.3
Chromium (Cr), % 26 to 29
0 to 0.3
Cobalt (Co), % 61.7 to 67.3
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
97.6 to 98.7
Manganese (Mn), % 0
0.9 to 1.2
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 1.5
0.15 to 0.3
Sulfur (S), % 0
0 to 0.025