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SAE-AISI T6 Steel vs. R30016 Cobalt

SAE-AISI T6 steel belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. They have a modest 25% 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 (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T6 steel and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 880 to 2150
1010

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1830
1360
Melting Onset (Solidus), °C 1770
1270
Specific Heat Capacity, J/kg-K 400
450
Thermal Conductivity, W/m-K 18
15
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.5
8.5
Embodied Carbon, kg CO2/kg material 11
7.7
Embodied Energy, MJ/kg 170
110
Embodied Water, L/kg 160
500

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 26 to 63
33
Strength to Weight: Bending, points 21 to 39
26
Thermal Diffusivity, mm2/s 4.7
3.9
Thermal Shock Resistance, points 26 to 64
24

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.9 to 1.4
Chromium (Cr), % 4.0 to 4.8
28 to 32
Cobalt (Co), % 11 to 13
49.6 to 66.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 55.9 to 63.5
0 to 3.0
Manganese (Mn), % 0.2 to 0.4
0.5 to 2.0
Molybdenum (Mo), % 0.4 to 1.0
0 to 1.5
Nickel (Ni), % 0 to 0.3
0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0.2 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 18.5 to 21
3.5 to 5.5
Vanadium (V), % 1.5 to 2.1
0