Metals Emissivity Table

Metal Emissivity
Aluminum  
Unoxidized 0.02 to 0.20
Oxidized 0.2 to 0.4
Brass  
Polished 0.01
Burnished 0.30
Oxidized 0.50
Chromium 0.40
Copper  
Polished 0.03
Roughened 0.10
Oxidized 0.4 to 0.8
Electrical Terminal Blocks 0.60
Gold 0.10
Haynes  
Alloy 0.3 to 0.8
Inconel  
Oxidized 0.70 to 0.95
Sandblasted 0.3 to 0.6
Electropolished 0.15
Iron  
Oxidized 0.5 to 0.9
Unoxidized 0.10
Rusted 0.5 to 0.7
Molten 0.40
Iron, Wrought  
Dull 0.90
Metal Emissivity
Lead  
Polished 0.05
Rough 0.40
Oxidized 0.2 to 0.6
Magnesium 0.05 to 0.80
Mercury 0.05 to 0.15
Molybdenum  
Oxidized 0.2 to 0.6
Nickel 0.2 to 0.7
Black Platinum 0.90
Silver 0.02
Steel  
Cold-Rolled 0.7 to 0.9
Ground Sheet 0.4 to 0.6
Polished Sheet 0.10
Molten 0.25
Oxidized 0.7 to 0.9
Stainless 0.1 to 0.8
Tin (Unoxidized) 0.1 to 0.3
Titanium  
Polished 0.30
Oxidized 0.5 to 0.6
Tungsten 0.1 to 0.6
Zinc  
Oxidized 0.10
Polished 0.05
   

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