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EN AC-48000 Aluminum vs. R30155 Cobalt

EN AC-48000 aluminum belongs to the aluminum alloys classification, while R30155 cobalt belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 EN AC-48000 aluminum and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
220
Elastic (Young's, Tensile) Modulus, GPa 73
210
Elongation at Break, % 1.0
34
Fatigue Strength, MPa 85 to 86
310
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 220 to 310
850
Tensile Strength: Yield (Proof), MPa 210 to 270
390

Thermal Properties

Latent Heat of Fusion, J/g 570
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 600
1470
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 890
450
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 21
14

Otherwise Unclassified Properties

Base Metal Price, % relative 10
80
Density, g/cm3 2.7
8.5
Embodied Carbon, kg CO2/kg material 7.9
9.7
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1030
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.2 to 3.0
230
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 510
370
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
23
Strength to Weight: Axial, points 23 to 33
28
Strength to Weight: Bending, points 31 to 39
24
Thermal Diffusivity, mm2/s 54
3.2
Thermal Shock Resistance, points 10 to 15
21

Alloy Composition

Aluminum (Al), % 80.4 to 87.2
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0.8 to 1.5
0
Iron (Fe), % 0 to 0.7
24.3 to 36.2
Magnesium (Mg), % 0.8 to 1.5
0
Manganese (Mn), % 0 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0.7 to 1.3
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), % 10.5 to 13.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0