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R30012 Cobalt vs. SAE-AISI T6 Steel

R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI T6 steel belongs to the iron alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 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 R30012 cobalt and the bottom bar is SAE-AISI T6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
81
Tensile Strength: Ultimate (UTS), MPa 830
880 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1470
1830
Melting Onset (Solidus), °C 1280
1770
Specific Heat Capacity, J/kg-K 440
400
Thermal Conductivity, W/m-K 15
18
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 8.8
9.5
Embodied Carbon, kg CO2/kg material 8.3
11
Embodied Energy, MJ/kg 120
170
Embodied Water, L/kg 480
160

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 26
26 to 63
Strength to Weight: Bending, points 22
21 to 39
Thermal Diffusivity, mm2/s 3.8
4.7
Thermal Shock Resistance, points 23
26 to 64

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.75 to 0.85
Chromium (Cr), % 27 to 32
4.0 to 4.8
Cobalt (Co), % 47.5 to 64.1
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
55.9 to 63.5
Manganese (Mn), % 0
0.2 to 0.4
Molybdenum (Mo), % 0 to 1.0
0.4 to 1.0
Nickel (Ni), % 0 to 3.0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 2.0
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 7.5 to 9.5
18.5 to 21
Vanadium (V), % 0
1.5 to 2.1