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R31537 Cobalt vs. 7049A Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 7049A aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 R31537 cobalt and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 14 to 23
5.0 to 5.7
Fatigue Strength, MPa 310 to 480
180
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 87
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
580 to 590
Tensile Strength: Yield (Proof), MPa 590 to 940
500 to 530

Thermal Properties

Latent Heat of Fusion, J/g 320
370
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1290
430
Specific Heat Capacity, J/kg-K 450
850
Thermal Conductivity, W/m-K 13
130
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
120

Otherwise Unclassified Properties

Density, g/cm3 8.4
3.1
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
28 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
1800 to 1990
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
44
Strength to Weight: Axial, points 33 to 44
52 to 53
Strength to Weight: Bending, points 26 to 32
50 to 51
Thermal Diffusivity, mm2/s 3.4
50
Thermal Shock Resistance, points 24 to 32
25

Alloy Composition

Aluminum (Al), % 0
84.6 to 89.5
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0.050 to 0.25
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
1.2 to 1.9
Iron (Fe), % 0 to 0.75
0 to 0.5
Magnesium (Mg), % 0
2.1 to 3.1
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
7.2 to 8.4
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15