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851.0 Aluminum vs. R30035 Cobalt

851.0 aluminum belongs to the aluminum alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 24 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 851.0 aluminum and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
220 to 230
Elongation at Break, % 3.9 to 9.1
9.0 to 46
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
84 to 89
Tensile Strength: Ultimate (UTS), MPa 130 to 140
900 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 630
1440
Melting Onset (Solidus), °C 360
1320
Specific Heat Capacity, J/kg-K 850
440
Thermal Conductivity, W/m-K 180
11
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 14
100
Density, g/cm3 3.1
8.7
Embodied Carbon, kg CO2/kg material 8.4
10
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 1140
410

Common Calculations

Stiffness to Weight: Axial, points 13
14 to 15
Stiffness to Weight: Bending, points 45
23 to 24
Strength to Weight: Axial, points 12 to 13
29 to 61
Strength to Weight: Bending, points 19 to 20
24 to 39
Thermal Diffusivity, mm2/s 69
3.0
Thermal Shock Resistance, points 6.1 to 6.3
23 to 46

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
0
Boron (B), % 0
0 to 0.015
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.7
0 to 1.0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0.3 to 0.7
33 to 37
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 2.0 to 3.0
0 to 0.15
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0 to 1.0
Residuals, % 0 to 0.3
0