Emissivity Values for Common Materials
[Emissivity Values Page 1] [Emissivity Values Page 2]
[Measured Normal Emissivities]
Material
Wavelength
Emit.
Aluminum: anodized  
0.770
Aluminum: anodized sheet, chromic acid process  
0.55
Aluminum: disk, roughened
3m
0.275
Aluminum: disk, roughened
10m
0.180
Aluminum: foil
3m
0.09
Aluminum: foil
10m
0.04
Aluminum: foil, dull side, crinkled and smoothed  
0.030
Aluminum: foil, shiny side  
0.036
Aluminum: heavily weathered
2-5.6m
.83-.94
Aluminum: highly polished plate, 98.3% pure  
0.039
Aluminum: highly polished plate, 98.3% pure  
0.057
Aluminum: oxide, flame sprayed .001" thick  
0.765
Aluminum: oxidized at 600°C  
0.11
Aluminum: oxidized at 600°C   
0.19
Aluminum: polished 
8-14m
0.05
Aluminum: polished plate   
0.04
Aluminum: polished sheet  
0.05
Aluminum: polished and degreased   
0.027
Aluminum: rough plate   
0.055
Aluminum: rough surface
8-14m
0.07
Aluminum: sandblasted  
0.210
Aluminum: sheet as received  
0.09
Aluminum: strongly oxidized
8-14m
0.25
Aluminum: vacuum deposited  
0.04
Brass: highly polished  
0.03
Brass: dull, tarnished
8-14m
0.22
Brass: rubbed with 80-grit emery   
0.20
Brass: oxidized  
0.61
Brass: polished
8-14m
0.10
Bronze: polished  
0.10
Bronze: porous, rough
8-14m
0.55
Chromium: polished
8-14m
0.10
Copper: commercial., burnished
8-14m
0.07
Copper: elecrolytic, polished
8-14m
0.02
Copper: polished  
0.05
Copper: polished
3m
0.031
Copper: polished
10m
0.016
Copper: polished, annealed
10m
0.008
Copper: oxidized
8-14m
0.65
Copper: oxidized, heavily  
0.78
Copper: oxidized to black
8-14m
0.88
Gold: polished
8-14m
0.02
Gold: highly polished  
0.02
Gold: plated on stainless steel and polished  
0.028
Iron, cast, casing
8-14m
0.81
Iron: cast, polished
8-14m
0.21
Iron: cast, oxidized  
0.64
Iron: hot rolled
8-14m
0.77
Iron: oxidized
8-14m
0.74
Iron: sheet, galvanized, burnished
8-14m
0.23
Iron: sheet, galvanized, oxidized
8-14m
0.28
Iron: sheet, heavily rusted  
0.69
Iron: shiny, etched
8-14m
0.16
Iron: wrought, polished
8-14m
0.28
Lead: gray
8-14m
0.28
Lead: oxidized
8-14m
0.63
Lead: red, powder
8-14m
0.93
Lead: shiny
8-14m
0.08
Magnesium: polished  
0.07
Mercury: pure
8-14m
0.10
Nickel: electroplated, polished  
0.05
Nickel: electroplated, no polish  
0.11
Nickel: on cast-iron
8-14m
0.05
Nickel: oxidized  
0.37
Nickel: pure, polished
8-14m
0.05
Platinum: pure, polished
8-14m
0.08
Silver: polished  
0.03
Stainless steel: type 18-8,buffed  
0.16
Stainless steel: type 18-8, oxidized at 800°C  
0.85
Stainless steel: type 18-8, sandblasted  
0.440
Steel: galvanized
8-14m
0.28
Steel: polished  
0.07
Steel: oxidized  
0.79
Steel: oxidized strongly
8-14m
0.88
Steel: rolled freshly
8-14m
0.24
Steel: rough surface
8-14m
0.96
Steel: rusty, red
8-14m
0.69
Steel: sheet, nickel plated
8-14m
0.11
Steel: sheet, rolled
8-14m
0.56
Tin: burnished
8-14m
0.05
Tim: commercial tin-plated sheet iron  
0.07
Tungsten
8-14m
0.05