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2017A Aluminum vs. R30816 Cobalt

2017A aluminum belongs to the aluminum alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 2017A aluminum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 2.2 to 14
23
Fatigue Strength, MPa 92 to 130
250
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 200 to 460
1020
Tensile Strength: Yield (Proof), MPa 110 to 290
460

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Melting Completion (Liquidus), °C 650
1540
Melting Onset (Solidus), °C 510
1460
Specific Heat Capacity, J/kg-K 880
420
Thermal Conductivity, W/m-K 150
13
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Density, g/cm3 3.0
9.1
Embodied Carbon, kg CO2/kg material 8.2
20
Embodied Energy, MJ/kg 150
320
Embodied Water, L/kg 1140
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.7 to 53
190
Resilience: Unit (Modulus of Resilience), kJ/m3 90 to 570
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
22
Strength to Weight: Axial, points 19 to 42
31
Strength to Weight: Bending, points 26 to 44
25
Thermal Diffusivity, mm2/s 56
3.3
Thermal Shock Resistance, points 8.9 to 20
28

Alloy Composition

Aluminum (Al), % 91.3 to 95.5
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0 to 0.1
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 0.7
0 to 5.0
Magnesium (Mg), % 0.4 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0