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R30006 Cobalt vs. Z21721 Zinc

R30006 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 (6, in this case) are not shown.

For each property being compared, the top bar is R30006 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, % 1.0
40
Poisson's Ratio 0.28
0.25
Shear Modulus, GPa 85
35
Tensile Strength: Ultimate (UTS), MPa 900
150
Tensile Strength: Yield (Proof), MPa 540
120

Thermal Properties

Latent Heat of Fusion, J/g 320
110
Melting Completion (Liquidus), °C 1400
410
Melting Onset (Solidus), °C 1290
390
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
27
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
37

Otherwise Unclassified Properties

Density, g/cm3 8.6
6.6
Embodied Carbon, kg CO2/kg material 7.8
2.8
Embodied Energy, MJ/kg 110
53
Embodied Water, L/kg 500
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
57
Resilience: Unit (Modulus of Resilience), kJ/m3 670
88
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 29
6.4
Strength to Weight: Bending, points 24
9.6
Thermal Diffusivity, mm2/s 3.9
44
Thermal Shock Resistance, points 26
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), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
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
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
98.9 to 100