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R30075 Cobalt vs. 384.0 Aluminum

R30075 cobalt belongs to the cobalt alloys classification, while 384.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 R30075 cobalt and the bottom bar is 384.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
74
Elongation at Break, % 12
2.5
Fatigue Strength, MPa 250 to 840
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 82 to 98
28
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
330
Tensile Strength: Yield (Proof), MPa 480 to 840
170

Thermal Properties

Latent Heat of Fusion, J/g 320
550
Melting Completion (Liquidus), °C 1360
580
Melting Onset (Solidus), °C 1290
530
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
96
Thermal Expansion, µm/m-K 12
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
22
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
69

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.9
Embodied Carbon, kg CO2/kg material 8.1
7.4
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 530
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
6.9
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
190
Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
49
Strength to Weight: Axial, points 26 to 42
32
Strength to Weight: Bending, points 22 to 31
37
Thermal Diffusivity, mm2/s 3.5
39
Thermal Shock Resistance, points 21 to 29
15

Alloy Composition

Aluminum (Al), % 0 to 0.1
77.3 to 86.5
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
3.0 to 4.5
Iron (Fe), % 0 to 0.75
0 to 1.3
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0 to 0.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
10.5 to 12
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.35
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
0 to 3.0
Residuals, % 0
0 to 0.5