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R30021 Cobalt vs. 336.0 Aluminum

R30021 cobalt belongs to the cobalt alloys classification, while 336.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is 336.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
75
Elongation at Break, % 9.0
0.5
Fatigue Strength, MPa 250
80 to 93
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
28
Tensile Strength: Ultimate (UTS), MPa 700
250 to 320
Tensile Strength: Yield (Proof), MPa 500
190 to 300

Thermal Properties

Latent Heat of Fusion, J/g 330
570
Melting Completion (Liquidus), °C 1350
570
Melting Onset (Solidus), °C 1190
540
Specific Heat Capacity, J/kg-K 450
890
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 11
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
29
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
95

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.8
Embodied Carbon, kg CO2/kg material 8.0
7.9
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 520
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
1.1 to 1.6
Resilience: Unit (Modulus of Resilience), kJ/m3 570
250 to 580
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 23
25 to 32
Strength to Weight: Bending, points 21
32 to 38
Thermal Diffusivity, mm2/s 3.8
48
Thermal Shock Resistance, points 21
12 to 16

Alloy Composition

Aluminum (Al), % 0
79.1 to 85.8
Carbon (C), % 0.2 to 0.35
0
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 61.7 to 67.3
0
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 0 to 3.0
0 to 1.2
Magnesium (Mg), % 0
0.7 to 1.3
Manganese (Mn), % 0
0 to 0.35
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
2.0 to 3.0
Silicon (Si), % 0 to 1.5
11 to 13
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.35