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R30008 Cobalt vs. EN AC-48100 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while EN AC-48100 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 EN AC-48100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
76
Elongation at Break, % 1.1 to 73
1.1
Fatigue Strength, MPa 320 to 530
120 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
29
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
240 to 330
Tensile Strength: Yield (Proof), MPa 500 to 1080
190 to 300

Thermal Properties

Latent Heat of Fusion, J/g 320
640
Melting Completion (Liquidus), °C 1400
580
Melting Onset (Solidus), °C 1330
470
Specific Heat Capacity, J/kg-K 450
880
Thermal Expansion, µm/m-K 13
20

Otherwise Unclassified Properties

Base Metal Price, % relative 95
11
Density, g/cm3 8.4
2.8
Embodied Carbon, kg CO2/kg material 8.1
7.3
Embodied Energy, MJ/kg 110
130
Embodied Water, L/kg 400
940

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
250 to 580
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 31 to 56
24 to 33
Strength to Weight: Bending, points 25 to 37
31 to 38
Thermal Shock Resistance, points 25 to 44
11 to 16

Alloy Composition

Aluminum (Al), % 0
72.1 to 79.8
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
4.0 to 5.0
Iron (Fe), % 7.6 to 20
0 to 1.3
Magnesium (Mg), % 0
0.25 to 0.65
Manganese (Mn), % 1.0 to 2.0
0 to 0.5
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
0 to 0.3
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
16 to 18
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 1.5
Residuals, % 0
0 to 0.25