RayTek MI3 - Typical Emissivity Values for Metals

Appendix
MI3 Rev. G Nov/2015 129
METALS
Material
Emissivity
3.9 µm
5 µm
8 – 14 µm
Aluminum
Unoxidized
0.02-0.2
0.02-0.2
0.02-0.1
Oxidized
0.2-0.4
0.2-0.4
0.2-0.4
Alloy A3003, Oxidized
0.4
0.4
0.3
Roughened
0.1-0.4
0.1-0.4
0.1-0.3
Polished
0.02-0.1
0.02-0.1
0.02-0.1
Brass
Polished
0.01-0.05
0.01-0.05
0.01-0.05
Burnished
0.3
0.3
0.3
Oxidized
0.5
0.5
0.5
Chromium
0.03-0.3
0.03-0.3
0.02-0.2
Copper
Polished
0.03
0.03
0.03
Roughened
0.05-0.15
0.05-0.15
0.05-0.1
Oxidized
0.5-0.8
0.5-0.8
0.4-0.8
Gold
0.01-0.1
0.01-0.1
0.01-0.1
Haynes
Alloy
0.3-0.8
0.3-0.8
0.3-0.8
Inconel
Oxidized
0.6-0.9
0.6-0.9
0.7-0.95
Sandblasted
0.3-0.6
0.3-0.6
0.3-0.6
Electropolished
0.15
0.15
0.15
Iron
Oxidized
0.6-0.9
0.6-0.9
0.5-0.9
Unoxidized
0.05-0.25
0.05-0.25
0.05-0.2
Rusted
0.5-0.8
0.5-0.8
0.5-0.7
Molten
—
—
—
Iron, Cast
Oxidized
0.65-0.95
0.65-0.95
0.6-0.95
Unoxidized
0.25
0.25
0.2
Molten
0.2-0.3
0.2-0.3
0.2-0.3
Iron, Wrought
Dull
0.9
0.9
0.9
Lead
Polished
0.05-0.2
0.05-0.2
0.05-0.1
Rough
0.4
0.4
0.4
Oxidized
0.2-0.7
0.2-0.7
0.2-0.6
Magnesium
0.03-0.15
0.03-0.15
0.02-0.1
Mercury
0.05-0.15
0.05-0.15
0.05-0.15
Molybdenum
Oxidized
0.3-0.7
0.3-0.7
0.2-0.6
Unoxidized
0.1-0.15
0.1-0.15
0.1
Monel (Ni-Cu)
0.1-0.5
0.1-0.5
0.1-0.14
Nickel
Oxidized
0.3-0.6
0.3-0.6
0.2-0.5
Electrolytic
0.1-0.15
0.1-0.15
0.05-0.15
Platinum
Black
0.9
0.9
0.9
Silver
0.02
0.02
0.02
Steel
Cold-Rolled
0.8-0.9
0.8-0.9
0.7-0.9
Ground Sheet
0.5-0.7
0.5-0.7
0.4-0.6