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EN AC-71100 Aluminum vs. R30816 Cobalt

EN AC-71100 aluminum belongs to the aluminum alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 24 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 EN AC-71100 aluminum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
280
Elastic (Young's, Tensile) Modulus, GPa 72
210
Elongation at Break, % 1.1
23
Fatigue Strength, MPa 150
250
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 260
1020
Tensile Strength: Yield (Proof), MPa 230
460

Thermal Properties

Latent Heat of Fusion, J/g 490
300
Melting Completion (Liquidus), °C 580
1540
Melting Onset (Solidus), °C 520
1460
Specific Heat Capacity, J/kg-K 860
420
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Density, g/cm3 2.9
9.1
Embodied Carbon, kg CO2/kg material 7.4
20
Embodied Energy, MJ/kg 140
320
Embodied Water, L/kg 1010
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
190
Resilience: Unit (Modulus of Resilience), kJ/m3 360
510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 47
22
Strength to Weight: Axial, points 25
31
Strength to Weight: Bending, points 31
25
Thermal Shock Resistance, points 12
28

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.3
0 to 5.0
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.15
0
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0