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R30008 Cobalt vs. 4147 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while 4147 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 4147 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
72
Elongation at Break, % 1.1 to 73
3.3
Fatigue Strength, MPa 320 to 530
42
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
27
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
110
Tensile Strength: Yield (Proof), MPa 500 to 1080
59

Thermal Properties

Latent Heat of Fusion, J/g 320
570
Melting Completion (Liquidus), °C 1400
580
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
9.5
Density, g/cm3 8.4
2.5
Embodied Carbon, kg CO2/kg material 8.1
7.7
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 400
1050

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
24
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 24
55
Strength to Weight: Axial, points 31 to 56
12
Strength to Weight: Bending, points 25 to 37
20
Thermal Shock Resistance, points 25 to 44
5.2

Alloy Composition

Aluminum (Al), % 0
85 to 88.9
Beryllium (Be), % 0
0 to 0.00030
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 7.6 to 20
0 to 0.8
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 1.0 to 2.0
0 to 0.1
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
11 to 13
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15