MakeItFrom.com
Menu (ESC)

R31539 Cobalt vs. 2017 Aluminum

R31539 cobalt belongs to the cobalt alloys classification, while 2017 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 R31539 cobalt and the bottom bar is 2017 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 13 to 22
12 to 18
Fatigue Strength, MPa 310 to 480
90 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
190 to 430
Tensile Strength: Yield (Proof), MPa 590 to 940
76 to 260

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1290
510
Specific Heat Capacity, J/kg-K 450
880
Thermal Conductivity, W/m-K 13
150
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
38
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
110

Otherwise Unclassified Properties

Density, g/cm3 8.4
3.0
Embodied Carbon, kg CO2/kg material 8.2
8.0
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
24 to 66
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
41 to 470
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 33 to 44
17 to 40
Strength to Weight: Bending, points 27 to 32
24 to 42
Thermal Diffusivity, mm2/s 3.5
56
Thermal Shock Resistance, points 24 to 32
7.9 to 18

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
91.6 to 95.5
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0 to 0.1
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
3.5 to 4.5
Iron (Fe), % 0 to 0.75
0 to 0.7
Lanthanum (La), % 0.030 to 0.2
0
Magnesium (Mg), % 0
0.4 to 0.8
Manganese (Mn), % 0 to 1.0
0.4 to 1.0
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
0.2 to 0.8
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants