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R30003 Cobalt vs. EN AC-45000 Aluminum

R30003 cobalt belongs to the cobalt alloys classification, while EN AC-45000 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, 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 EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
73
Elongation at Break, % 10 to 73
1.1
Fatigue Strength, MPa 320 to 560
75
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
27
Tensile Strength: Ultimate (UTS), MPa 970 to 1720
180
Tensile Strength: Yield (Proof), MPa 510 to 1090
110

Thermal Properties

Latent Heat of Fusion, J/g 310
470
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1440
520
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
81

Otherwise Unclassified Properties

Base Metal Price, % relative 95
11
Density, g/cm3 8.4
3.0
Embodied Carbon, kg CO2/kg material 8.0
7.7
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 400
1070

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 600 to 2790
80
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 32 to 57
17
Strength to Weight: Bending, points 26 to 38
24
Thermal Diffusivity, mm2/s 3.3
47
Thermal Shock Resistance, points 26 to 45
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Boron (B), % 0 to 0.1
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 19 to 21
0 to 0.15
Cobalt (Co), % 39 to 41
0
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 10 to 20.5
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 1.5 to 2.5
0.2 to 0.65
Molybdenum (Mo), % 6.0 to 8.0
0
Nickel (Ni), % 14 to 16
0 to 0.45
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
5.0 to 7.0
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35