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Infrared Transmitting Glass vs. Zamak 3

Infrared transmitting glass and Zamak 3 belong to fundamentally different material chemistries. Infrared transmitting glass is a ceramic material, while Zamak 3 is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 9 material properties with values for both materials. Properties with values for just one material (29, in this case) are not shown.

For each property being compared, the top bar is infrared transmitting glass and the bottom bar is Zamak 3.

Infrared Transmitting GlassZamak 3 (ASTM AG40A, Z33520, Mazak 3) Zinc Alloy
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 4.4 to 4.8
6.4
Elastic (Young's, Tensile) Modulus, GPa 18 to 63
86
Poisson's Ratio 0.28 to 0.3
0.25
Specific Heat Capacity, J/kg-K 360 to 430
410
Stiffness to Weight: Axial, points 2.3 to 7.3
7.5
Stiffness to Weight: Bending, points 20 to 28
23
Thermal Conductivity, W/m-K 0.0060 to 0.23
110
Thermal Diffusivity, mm2/s 0.0029 to 0.14
43
Thermal Expansion, µm/m-K 9.0 to 17
27