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R30001 Cobalt vs. SAE-AISI S6 Steel

R30001 cobalt belongs to the cobalt alloys classification, while SAE-AISI S6 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is SAE-AISI S6 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 86
72
Tensile Strength: Ultimate (UTS), MPa 620
670 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Melting Completion (Liquidus), °C 1530
1430
Melting Onset (Solidus), °C 1260
1390
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 15
41
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.9

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 8.9
2.3
Embodied Energy, MJ/kg 130
33
Embodied Water, L/kg 460
56

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19
24 to 70
Strength to Weight: Bending, points 18
22 to 45
Thermal Diffusivity, mm2/s 3.7
11
Thermal Shock Resistance, points 19
22 to 64

Alloy Composition

Carbon (C), % 2.0 to 3.0
0.4 to 0.5
Chromium (Cr), % 28 to 32
1.2 to 1.5
Cobalt (Co), % 43 to 59
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
92.8 to 94.7
Manganese (Mn), % 0
1.2 to 1.5
Molybdenum (Mo), % 0 to 1.0
0.3 to 0.5
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
2.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 11 to 13
0
Vanadium (V), % 0
0.2 to 0.4