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ASTM B631 Class A vs. Z21210 Zinc

ASTM B631 class A belongs to the otherwise unclassified metals classification, while Z21210 zinc belongs to the zinc alloys. There are 9 material properties with values for both materials. Properties with values for just one material (12, 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 ASTM B631 class A and the bottom bar is Z21210 zinc.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 15
7.1
Electrical Conductivity: Equal Volume, % IACS 40 to 47
28
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
35
Melting Completion (Liquidus), °C 2680 to 2690
420
Rockwell B Hardness 63 to 98
45 to 58
Specific Heat Capacity, J/kg-K 160
400
Thermal Conductivity, W/m-K 420
110
Thermal Diffusivity, mm2/s 180
38
Thermal Expansion, µm/m-K 11
32