RayTek Thermalert ET Series, Operator'S Manual, Page: 29 / 33

A-2 Thermalert ET Series Operator's Manual
Typical Emissivity Values
Metals
Material Emissivity
2.2µm 5.1µm 8-14µm
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 0.2-0.6 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 0.4 0.3 0.3
Oxidized 0.6 0.5 0.5
Chromium 0.05-0.3 0.03-0.3 0.02-0.2
Copper
Polished 0.03 0.03 0.03
Roughened 0.05-0.2 0.05-0.15 0.05-0.1
Oxidized 0.7-0.9 0.5-0.8 0.4-0.8
Gold 0.01-0.1 0.01-0.1 0.01-0.1
Haynes
Alloy 0.6-0.9 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 0.25 0.15 0.15
Iron
Oxidized 0.7-0.9 0.6-0.9 0.5-0.9
Unoxidized 0.1-0.3 0.05-0.25 0.05-0.2
Rusted 0.6-0.9 0.5-0.8 0.5-0.7
Molten 0.4-0.6 — —
Iron, Cast
Oxidized 0.7-0.95 0.65-0.95 0.6-0.95
Unoxidized 0.3 0.25 0.2
Molten 0.3-0.4 0.2-0.3 0.2-0.3
Iron, Wrought
Dull 0.95 0.9 0.9
Lead
Polished 0.05-0.2 0.05-0.2 0.05-0.1
Rough 0.5 0.4 0.4