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R30016 Cobalt vs. Z21721 Zinc

R30016 cobalt belongs to the cobalt alloys classification, while Z21721 zinc belongs to the zinc alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 8.4
40
Poisson's Ratio 0.28
0.25
Shear Modulus, GPa 85
35
Tensile Strength: Ultimate (UTS), MPa 1010
150
Tensile Strength: Yield (Proof), MPa 580
120

Thermal Properties

Latent Heat of Fusion, J/g 320
110
Melting Completion (Liquidus), °C 1360
410
Melting Onset (Solidus), °C 1270
390
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 14
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
37

Otherwise Unclassified Properties

Density, g/cm3 8.5
6.6
Embodied Carbon, kg CO2/kg material 7.7
2.8
Embodied Energy, MJ/kg 110
53
Embodied Water, L/kg 500
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
57
Resilience: Unit (Modulus of Resilience), kJ/m3 770
88
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 33
6.4
Strength to Weight: Bending, points 26
9.6
Thermal Diffusivity, mm2/s 3.9
44
Thermal Shock Resistance, points 24
4.8

Alloy Composition

Aluminum (Al), % 0
0 to 0.0020
Cadmium (Cd), % 0
0 to 0.070
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 28 to 32
0
Cobalt (Co), % 49.6 to 66.9
0
Copper (Cu), % 0
0 to 0.0050
Iron (Fe), % 0 to 3.0
0 to 0.010
Lead (Pb), % 0
0 to 1.0
Manganese (Mn), % 0.5 to 2.0
0
Molybdenum (Mo), % 0 to 1.5
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0.2 to 2.0
0
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 3.5 to 5.5
0
Zinc (Zn), % 0
98.9 to 100