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 |
|
|
|