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1235 Aluminum vs. R30008 Cobalt

1235 aluminum belongs to the aluminum alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 23 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 1235 aluminum and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 28 to 34
1.1 to 73
Fatigue Strength, MPa 23 to 58
320 to 530
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
83
Tensile Strength: Ultimate (UTS), MPa 80 to 84
950 to 1700
Tensile Strength: Yield (Proof), MPa 23 to 57
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 640
1330
Specific Heat Capacity, J/kg-K 900
450
Thermal Expansion, µm/m-K 23
13

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
95
Density, g/cm3 2.7
8.4
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 1190
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 3.8 to 24
590 to 2720
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 8.2 to 8.6
31 to 56
Strength to Weight: Bending, points 15 to 16
25 to 37
Thermal Shock Resistance, points 3.6 to 3.7
25 to 44

Alloy Composition

Aluminum (Al), % 99.35 to 100
0
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.65
7.6 to 20
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.050
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.65
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.060
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.1
0