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5040 Aluminum vs. R30155 Cobalt

5040 aluminum belongs to the aluminum alloys classification, while R30155 cobalt belongs to the iron alloys. There are 29 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 5040 aluminum and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 66 to 74
220
Elastic (Young's, Tensile) Modulus, GPa 70
210
Elongation at Break, % 5.7 to 6.8
34
Fatigue Strength, MPa 100 to 130
310
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
81
Shear Strength, MPa 140 to 150
570
Tensile Strength: Ultimate (UTS), MPa 240 to 260
850
Tensile Strength: Yield (Proof), MPa 190 to 230
390

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 650
1470
Melting Onset (Solidus), °C 600
1420
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 160
12
Thermal Expansion, µm/m-K 23
14

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.8
8.5
Embodied Carbon, kg CO2/kg material 8.3
9.7
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 15
230
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 380
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 24 to 26
28
Strength to Weight: Bending, points 31 to 32
24
Thermal Diffusivity, mm2/s 64
3.2
Thermal Shock Resistance, points 10 to 11
21

Alloy Composition

Aluminum (Al), % 95.2 to 98
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0.1 to 0.3
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.7
24.3 to 36.2
Magnesium (Mg), % 1.0 to 1.5
0
Manganese (Mn), % 0.9 to 1.4
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0