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Appendix | Emissivity Table Metals
thermoMETER CT
A 3 Emissivity Table Metals
i
Please note that these are only approximate values, which were taken from various sources.
Material Typical Emissivity
Spectral response 1.0 μm 1.6 μm 5.1 μm 8 - 14 μm
Aluminum Non oxidized 0.1 - 0.2 0.02 - 0.2 0.02 - 0.2 0.02 - 0.1
Polished 0.1 - 0.2 0.02 - 0.1 0.02 - 0.1 0.02 - 0.1
Roughened 0.2 - 0.8 0.2 - 0.6 0.1 - 0.4 0.1 - 0.3
Oxidized 0.4 0.4 0.2 - 0.4 0.2 - 0.4
Brass Polished 0.35 0.01 - 0.05 0.01 - 0.05 0.01 - 0.05
Roughened 0.65 0.4 0.3 0.3
Oxidized 0.6 0.6 0.5 0.5
Copper Polished 0.05 0.03 0.03 0.03
Roughened 0.05 - 0.2 0.05 - 0.2 0.05 - 0.15 0.05 - 0.1
Oxidized 0.2 - 0.8 0.2 - 0.9 0.5 - 0.8 0.4 - 0.8
Chrome 0.4 0.4 0.03 - 0.3 0.02 - 0.2
Gold 0.3 0.01 - 0.1 0.01 - 0.1 0.01 - 0.1
Haynes Alloy 0.5 - 0.9 0.6 - 0.9 0.3 - 0.8 0.3 - 0.8
Inconel Electro
polished
0.2 - 0.5 0.25 0.15 0.15
Sandblast 0.3 - 0.4 0.3 - 0.6 0.3 - 0.6 0.3 - 0.6
Oxidized 0.4 - 0.9 0.6 - 0.9 0.6 - 0.9 0.7 - 0.95
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