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G-CoCr28 Cobalt vs. 705.0 Aluminum

G-CoCr28 cobalt belongs to the cobalt alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 G-CoCr28 cobalt and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
69
Elongation at Break, % 6.7
8.4 to 10
Fatigue Strength, MPa 130
63 to 98
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 83
26
Tensile Strength: Ultimate (UTS), MPa 560
240 to 260
Tensile Strength: Yield (Proof), MPa 260
130

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Maximum Temperature: Mechanical, °C 1200
180
Melting Completion (Liquidus), °C 1330
640
Melting Onset (Solidus), °C 1270
610
Specific Heat Capacity, J/kg-K 470
890
Thermal Conductivity, W/m-K 8.5
140
Thermal Expansion, µm/m-K 14
24

Otherwise Unclassified Properties

Base Metal Price, % relative 100
9.5
Density, g/cm3 8.1
2.8
Embodied Carbon, kg CO2/kg material 6.2
8.4
Embodied Energy, MJ/kg 84
150
Embodied Water, L/kg 440
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 160
120 to 130
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 19
24 to 26
Strength to Weight: Bending, points 19
31 to 32
Thermal Diffusivity, mm2/s 2.2
55
Thermal Shock Resistance, points 14
11

Alloy Composition

Aluminum (Al), % 0
92.3 to 98.6
Carbon (C), % 0.050 to 0.25
0
Chromium (Cr), % 27 to 30
0 to 0.4
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 9.7 to 24.5
0 to 0.8
Magnesium (Mg), % 0
1.4 to 1.8
Manganese (Mn), % 0 to 1.5
0 to 0.6
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.5 to 1.5
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 3.3
Residuals, % 0
0 to 0.15