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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