RayTek Thermalert GP series - Typical Emissivity Values for Metals

66 Thermalert GP Series Operator’s Manual
C.2 TYPICAL EMISSIVITY VALUES FOR METALS
Material Emissivity
Aluminum
Unoxidized 0.02-0.1
Oxidized 0.2-0.4
Alloy A3003,
Oxidized 0.3
Roughened 0.1-0.3
Brass
Burnished 0.3
Oxidized 0.5
Copper
Polished 0.03
Roughened 0.05-0.1
Oxidized 0.4-0.8
Haynes
Alloy 0.3-0.8
Inconel
Oxidized 0.7-0.95
Sandblasted 0.3-0.6
Iron
Oxidized 0.5-0.9
Unoxidized 0.05-0.2
Rusted 0.5-0.7
Iron, Cast
Oxidized 0.6-0.95
Unoxidized 0.2
Iron, Wrought
Dull 0.9
Lead
Rough 0.4
Molybdenum
Oxidized 0.2-0.6
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