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R30006 Cobalt vs. EN 1.7108 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.7108 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 R30006 cobalt and the bottom bar is EN 1.7108 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
72
Tensile Strength: Ultimate (UTS), MPa 900
670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1290
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
8.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 7.8
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 500
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
24 to 75
Strength to Weight: Bending, points 24
22 to 47
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 26
20 to 63

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.57 to 0.65
Chromium (Cr), % 27 to 32
0.2 to 0.45
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
95.9 to 96.9
Manganese (Mn), % 0
0.7 to 1.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
1.6 to 2.0
Sulfur (S), % 0
0 to 0.025
Tungsten (W), % 4.0 to 6.0
0