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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
