Applications Guide
136
Modline 5
Emissivity Values of Metals and Alloys
(Flat, Unoxidized Surfaces)
Emissivity ranges shown represent differences in surface finish: mirror quality finish to dull,
mill finish.
Values for low-emissivity entries can be significantly greater than shown if surfaces are even
slightly contaminated.
Material
Emissivity Range by Sensor Series
52, 5R
(One Color Mode)
5G
56
Alumel
0.40-0.60
0.35-0.50
0.20-0.35
Aluminium
0.05-0.20
0.04-0.16
0.03-0.15
Brass
0.15-0.30
0.10-0.25
0.08-0.20
Bronze
0.20-0.40
0.15-0.30
0.10-0.25
Chromel
0.40-0.60
0.35-0.50
0.20-0.35
Chromium
0.40-0.60
0.35-0.50
0.30-0.45
Cobalt
0.25-0.40
0.20-0.35
0.15-0.25
Constantan
0.25-0.40
0.20-0.35
0.15-0.25
Copper
0.05-0.20
0.04-0.16
0.03-0.15
Gold
0.05-0.20
0.04-0.16
0.03-0.15
Inconel
0.40-0.60
0.35-0.50
0.20-0.35
Iron
0.35-0.50
0.25-0.40
0.20-0.35
Iron, Cast
0.35-0.50
0.25-0.40
0.20-0.35
Lead
0.25-0.40
0.15-0.25
0.10-0.20
Molybdenum
0.35-0.50
0.25-0.40
0.20-0.35
Monel
0.40-0.60
0.35-0.50
0.20-0.35
Nichrome
0.40-0.60
0.35-0.50
0.20-0.35
Nickel
0.30-0.50
0.25-0.40
0.15-0.30
Platinum
0.25-0.35
0.20-0.30
0.15-0.25
Silver
0.05-0.20
0.04-0.16
0.03-0.15
Steel, Carbon
0.35-0.50
0.35-0.40
0.20-0.35
Steel, Stainless
0.40-0.60
0.35-0.50
0.20-0.35
Tantalum
0.20-0.60
0.15-0.30
0.10-0.30
Titanium
0.40-0.60
0.30-0.50
0.20-0.35
Tungsten
0.35-0.50
0.25-0.40
0.10-0.25
Vanadium
0.35-0.50
0.30-0.40
0.25-0.35
Zinc, molten
0.20-0.40
0.15-0.30
0.10-0.25
Code 1
Table 17: Emissivity Values of Metals and Alloys
