Appendix
Marathon
Series
FA/FR
55
E
MISSIVITY AT
1 µ
M FOR
M
ETALS
Aluminum
Iron,
cast
unoxidized 0.1-0.2
oxidized 0.9
oxidized 0.4
unoxidized
0.35
roughened 0.2-0.8
molten 0.35
polished 0.1-0.2
Magnesium
0.3-0.8
Brass
Molybdenum
polished 0.35
oxidized
0.5-0.9
Burnished 0.65
unoxidized
0.25-0.35
Chromium 0.4
Monel
(Ni-Cu)
0.3
Copper
Nickel
polished 0.05
oxidized
0.8-0.9
roughened 0.05-0.2
electrolytic
0.2-0.4
oxidized 0.2-0.8
Silver 0.04
Gold 0.3
Steel
Haynes
cold
rolled
0.8-0.9
Alloy 0.5-0.9
polished
sheet
0.35
Inconel
molten
0.35
oxidized 0.4-0.9
oxidized
0.8-0.9
sandblasted 0.3-0.4
stainless 0.35
electropolished 0.2-0.5
Tin
(unoxidized) 0.25
Iron
Titan
oxidized 0.7-0.9
polished
0.5-0.75
unoxidized 0.35
Zinc
rusted 0.35
oxidized
0.6
polished
0.5
Table
12:
Typical
Emissivity
Values
(Metals)
E
MISSIVITY AT
1 µ
M
FOR
N
ON
-M
ETALS
Asbestos 0.9
Ceramic 0.4
Concrete 0.65
Carbon
unoxidized 0.8-0.95
Graphite 0.8-0.9
Table
13:
Typical
Emissivity
Values
(Non
‐
Metals)