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EMISSIVITY TABLE
Material
Emissivity (
e
)
Aluminum – pure highly polished plate . . . . . . . . . . . . . . . . 0.04 – 0.06
Aluminum – heavily oxidized . . . . . . . . . . . . . . . . . . . . . . . 0.20 – 0.31
Aluminum – commercial sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.09
Brass – dull plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.22
Brass – highly polished, 73.2% Cu, 26.7% Zn. . . . . . . . . . . . . . . . . 0.03
Chromium – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.08 – 0.36
Copper – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05
Copper – heated at 1110°F (600°C) . . . . . . . . . . . . . . . . . . . . . . . 0.57
Gold – pure, highly polished or liquid . . . . . . . . . . . . . . . . . 0.02 – 0.04
Iron and steel (excluding stainless) – polished iron . . . . . . . . 0.14 – 0.38
Iron and steel (excluding stainless) – polished cast iron . . . . . . . . . . 0.21
Iron and steel (excluding stainless) – polished wrought iron . . . . . . . 0.28
Iron and steel (excluding stainless) – oxidized dull wrought iron . . . . 0.94
Iron and steel (excluding stainless) – rusted iron plate . . . . . . . . . . . 0.69
Iron and steel (excluding stainless) – polished steel . . . . . . . . . . . . . 0.07
Iron and steel (excluding stainless) – polished steel oxidized at
1110°F (600°C) . . . . . . . . . . . 0.79
Iron and steel (excluding stainless) – rolled sheet steel . . . . . . . . . . . 0.66
Iron and steel (excluding stainless) – rough steel plate . . . . . . 0.94 – 0.97
Lead – gray and oxidized . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28
Mercury . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.09 – 0.12
Molybdenum filament. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 – 0.20
Nickel – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07
Nickel – oxidized at 1200°F – 2290°F . . . . . . . . . . . . . . . . 0.59 – 0.86
Platinum – pure polished plate . . . . . . . . . . . . . . . . . . . . . . 0.05 – 0.10
Platinum – wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07 – 0.18
Silver – pure and polished . . . . . . . . . . . . . . . . . . . . . . . . . 0.02 – 0.03
Stainless steel – polished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.07
Stainless steel – Type 301 at 450°F – 1725°F . . . . . . . . . . . 0.54 – 0.63
Tin – bright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06
Tungsten – filament . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.39
Zinc – polished commercial pure . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05
Zinc – galvanized sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.23
MET
ALS
Addendum: HHM29-IR
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