Measured Surfaces
Emissivity
Metal
Aluminum
Oxidization
0.2-0.4
A3003 Alloy
Oxidization
Rough
0.3
0.1-0.3
Brass
Burnishing
Oxidization
0.3
0.5
Copper
Oxidization
Electric Terminal
Board
0.4-0.8
0.6
Hastelloy
Alloy
0.3-0.8
Inconel
Oxidization
Sand-Blasting
Electro Burnishing
0.7-0.95
0.3-0.6
0.15
Iron
Oxidization
0.5-0.9