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R30008 Cobalt vs. 358.0 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while 358.0 aluminum belongs to the aluminum 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 R30008 cobalt and the bottom bar is 358.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 1.1 to 73
3.5 to 6.0
Fatigue Strength, MPa 320 to 530
100 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
27
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
350 to 370
Tensile Strength: Yield (Proof), MPa 500 to 1080
290 to 320

Thermal Properties

Latent Heat of Fusion, J/g 320
520
Melting Completion (Liquidus), °C 1400
600
Melting Onset (Solidus), °C 1330
560
Specific Heat Capacity, J/kg-K 450
900
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Base Metal Price, % relative 95
19
Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 8.1
8.7
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 400
1090

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
590 to 710
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
53
Strength to Weight: Axial, points 31 to 56
37 to 39
Strength to Weight: Bending, points 25 to 37
42 to 44
Thermal Shock Resistance, points 25 to 44
16 to 17

Alloy Composition

Aluminum (Al), % 0
89.1 to 91.8
Beryllium (Be), % 0
0.1 to 0.3
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0 to 0.2
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 7.6 to 20
0 to 0.3
Magnesium (Mg), % 0
0.4 to 0.6
Manganese (Mn), % 1.0 to 2.0
0 to 0.2
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
7.6 to 8.6
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.1 to 0.2
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15