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R30605 Cobalt vs. SAE-AISI O6 Steel

R30605 cobalt belongs to the cobalt alloys classification, while SAE-AISI O6 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is SAE-AISI O6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
71
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 9.6
43
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.6

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.7
Embodied Carbon, kg CO2/kg material 9.8
1.5
Embodied Energy, MJ/kg 140
21
Embodied Water, L/kg 450
47

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
24 to 74
Strength to Weight: Bending, points 25 to 36
22 to 47
Thermal Diffusivity, mm2/s 2.5
12
Thermal Shock Resistance, points 31 to 52
22 to 69

Alloy Composition

Carbon (C), % 0.050 to 0.15
1.3 to 1.6
Chromium (Cr), % 19 to 21
0 to 0.3
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
94.6 to 97.7
Manganese (Mn), % 1.0 to 2.0
0.3 to 1.1
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 9.0 to 11
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.4
0.55 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
0

Comparable Variants