RayTek MARATHON MM SERIES - Page 86

Appendix
86 Rev. D7 Jul 2017 Marathon MM
METALS
Emissivity
Material
1 µm
1.6 µm
2.3 µm
3.9 µm
5 µm
7.9 µm
8 – 14 µm
Monel (Ni-Cu)
0.3
0.2-0.6
0.2-0.6
0.1-0.5
0.1-0.5
0.10-0.25
0.1-0.14
Oxidized
0.60-0.85
0.7-0.9
Nickel
Oxidized
0.8-0.9
0.4-0.7
0.4-0.7
0.3-0.6
0.3-0.6
0.80-0.95
0.2-0.5
Electrolytic
0.2-0.4
0.1-0.3
0.1-0.2
0.1-0.15
0.1-0.15
0.05-0.15
Platinum
Black
0.95
0.95
0.9
0.9
0.9
Silver
0.02
0.02
0.02
0.02
0.03-0.15
0.02
Steel
Cold-Rolled
0.8-0.9
0.8-0.9
0.8-0.9
0.8-0.9
0.7-0.9
Ground Sheet
0.6-0.7
0.5-0.7
0.5-0.7
0.4-0.6
Polished Sheet
0.35
0.25
0.2
0.1
0.1
0.10-0.25
0.1
Molten
0.35
0.25-0.4
0.25-0.4
0.1-0.2
0.1-0.2
Oxidized
0.8-0.9
0.8-0.9
0.8-0.9
0.7-0.9
0.7-0.9
0.80-0.95
0.7-0.9
Stainless
0.35
0.2-0.9
0.2-0.9
0.15-0.8
0.15-0.8
0.10-0.25
0.1-0.8
Tin (Unoxidized)
0.25
0.1-0.3
0.1-0.3
0.05
0.05
0.05
Titanium
Polished
0.5-0.75
0.3-0.5
0.2-0.5
0.1-0.3
0.1-0.3
0.05-0.2
Oxidized
0.6-0.8
0.6-0.8
0.5-0.7
0.5-0.7
0.5-0.6
Tungsten
0.1-0.6
0.05-0.5
0.05-0.5
0.03
Polished
0.35-0.4
0.1-0.3
0.1-0.3
0.05-0.25
0.05-0.25
0.05-0.20
0.03-0.1
Zinc
Oxidized
0.6
0.15
0.15
0.1
0.1
0.1
Polished
0.5
0.05
0.05
0.03
0.03
0.15-0.25
0.02
Tab. 13: Typical Emissivity Values