|
|
MATERIAL |
°C |
EMISSIVITY |
|
Alloys: Nicket-Chromium |
|
20Ni-25Cr-55Fe, Oxidized |
200 |
0.90 |
|
60Ni-12Cr-28Fe, Oxidized |
270 |
0.89 |
|
80Ni-20Cr |
100 |
0.87 |
|
Aluminum: |
|
Polished |
50-500 |
0.04-0.06 |
|
Rough Surfaces |
20-50 |
0.06-0.07 |
|
Strongly Oxidized |
55-500 |
0.2-0.3 |
|
Oxidized |
200 |
0.11 |
|
Asbestos Boards |
20 |
0.96 |
|
Bismuth, Oxidized |
25 |
0.048 |
|
Brass: |
|
Dull, Tarnished |
200 |
0.61 |
|
Oxidized @ 600˚C |
200 |
0.61 |
|
Unoxidized |
25 |
0.035 |
|
Polished |
200 |
0.03 |
|
Rolled Sheet |
20 |
0.06 |
|
Carbon: |
|
Filament |
1000-1400 |
0.53 |
|
Graphite |
0-3600 |
0.7-0.8 |
|
Lamp Black |
20-400 |
0.96 |
|
Soot Applied to Solid |
50-1000 |
0.96 |
|
Soot with Water Glass |
20-200 |
0.96 |
|
Unoxidized |
100 |
0.81 |
|
Chromium, Polished |
50 |
0.1 |
|
Cobalt, Unoxidized |
500 |
0.13 |
|
Columbium, Unoxidized |
1500 |
0.19 |
|
Copper: |
|
Calorized |
100 |
0.26 |
|
Calorized, Oxidized |
200 |
0.18 |
|
Commercial, Scoured to a Shine |
20 |
0.07 |
|
Oxidized |
50 |
0.6-0.7 |
|
Polished |
50-100 |
0.02 |
|
Unoxidized |
100 |
0.02 |
|
Unoxidized liquid |
--- |
0.15 |
|
Fire Brick |
1000 |
0.75 |
|
G-10 Epoxy Resin |
--- |
0.95 |
|
Glass |
20-100 |
0.94-0.91 |
|
Gold: |
|
Carefully Polished |
200-600 |
0.02-0.03 |
|
Unoxidized |
100 |
0.02 |
|
Enamel |
100 |
0.37 |
|
Graphite |
0-3600 |
0.7-0.8 |
|
Gypsum |
20 |
0.93 |
|
Iron, Cast: |
|
Oxidized |
200 |
0.64 |
|
Strongly Oxidized |
40 |
0.95 |
|
Unoxidized |
100 |
0.21 |
|
Unoxidized, Liquid |
--- |
0.29 |
|
Rusted |
25 |
0.65 |
|
Wrought, Dull |
100 |
0.05 |
|
Lamp Black |
25 |
0.94 |
|
Lead: |
|
Oxidized |
200 |
0.96 |
|
Unoxidized |
200 |
0.63 |
|
Mercury, Unoxidized |
25 |
0.10 |
|
Molybdenum |
600-1000 |
0.08-0.13 |
|
Monel, Metal Oxidized |
200 |
0.43 |
|
Nichrom Wire: |
|
Clean |
50 |
0.65 |
|
Oxidized |
50-500 |
0.95-0.98 |
|
Nickel: |
|
Industrial, Polished |
200-400 |
0.07-0.09 |
|
Oxidized |
200 |
0.37 |
|
Oxidized @ 600˚C |
200-600 |
0.37-0.48 |
|
Unoxidized |
25 |
0.045 |
|
Platinum: |
|
Clean, Polished |
200-600 |
0.05-0.1 |
|
Unoxidized |
25 |
0.037 |
|
Unoxidized, Wire |
50-200 |
0.06-0.07 |
|
Porcelain, Glazed |
20 |
0.92 |
|
Quartz |
--- |
0.92 |
|
Rubber: |
|
Hard |
20 |
0.95 |
|
Soft, Grey, Rough |
20 |
0.86 |
|
Silica Brick |
1000 |
0.80 |
|
Silicon |
--- |
0.92 |
|
Silver: |
|
Clean Polished |
200-600 |
0.02-0.03 |
|
Unoxidized |
100 |
0.02 |
|
Soot Applied to Solid Surface |
50-1000 |
0.94-0.91 |
|
Soot with Water Glass |
20-200 |
0.96 |
|
Steel: |
|
Alloyed (8% Ni, 18% Cr) |
500 |
0.35 |
|
Aluminized |
50-500 |
0.79 |
|
Dull Nickel Plated |
20 |
0.11 |
|
Flat, Rough Surface |
50 |
0.95-0.98 |
|
Cast, Polished |
750-1050 |
0.52-0.56 |
|
Sheet, Ground |
50 |
0.56 |
|
Oxidized |
200-600 |
0.8 |
|
Calorized, Oxidized |
200 |
0.52 |
|
Sheet with Shiny Layer Oxidized |
20 |
0.82 |
|
Strongly Oxidized |
50 |
0.88 |
|
Unoxidized |
100 |
0.08 |
|
Unoxidized, Liquid |
--- |
0.28 |
|
Tantalum, Oxidized |
1500 |
0.21 |
|
Tungsten, Unoxidized |
25 |
0.024 |
|
Varnish: |
|
Varnish |
40-100 |
0.8-0.95 |
|
Dull Black |
40-100 |
0.96-0.98 |
|
Glossy Black Sprayed on Iron |
20 |
0.87 |
|
Zinc: |
|
Polished |
200-300 |
0.04-0.05 |
|
