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R31538 Cobalt vs. Z21210 Zinc

R31538 cobalt belongs to the cobalt alloys classification, while Z21210 zinc belongs to the zinc alloys. There are 12 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is Z21210 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
150 to 170

Thermal Properties

Melting Completion (Liquidus), °C 1360
420
Melting Onset (Solidus), °C 1290
420
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 13
110
Thermal Expansion, µm/m-K 13
32

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
35

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.1

Common Calculations

Strength to Weight: Axial, points 34 to 45
5.7 to 6.4
Strength to Weight: Bending, points 27 to 32
8.6 to 9.4
Thermal Diffusivity, mm2/s 3.5
38

Comparable Variants