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R30003 Cobalt vs. 4115 Aluminum

R30003 cobalt belongs to the cobalt alloys classification, while 4115 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 R30003 cobalt and the bottom bar is 4115 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 10 to 73
1.1 to 11
Fatigue Strength, MPa 320 to 560
39 to 76
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
26
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
120 to 220
Tensile Strength: Yield (Proof), MPa 510 to 1090
39 to 190

Thermal Properties

Latent Heat of Fusion, J/g 310
420
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1440
590
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
41
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
140

Otherwise Unclassified Properties

Base Metal Price, % relative 95
9.5
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.0
8.1
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 400
1160

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
11 to 270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 32 to 57
12 to 23
Strength to Weight: Bending, points 26 to 38
20 to 30
Thermal Diffusivity, mm2/s 3.3
66
Thermal Shock Resistance, points 26 to 45
5.2 to 9.9

Alloy Composition

Aluminum (Al), % 0
94.6 to 97.4
Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 39 to 41
0
Copper (Cu), % 0
0.1 to 0.5
Iron (Fe), % 10 to 20.5
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 1.5 to 2.5
0.6 to 1.2
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
1.8 to 2.2
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15

Comparable Variants