THERMAL FINISHES (2)

PCAnalyze TAK 2000 Thermal Connection

 
       MATERIAL                         Emissivity
------------------------------------------------------                                                                                            
Aluminum
   Highly polished                      0.039-0.057
   Commercial sheet                     0.09
   Heavily oxidized                     0.20-0.31
   surface roofing                      0.216

Brass
   Highly polished                      0.028-0.037
   Dull plate                           0.22

Copper
   Polished                             0.023
   Thick oxide layer                    0.78

Gold
   Pure, highly polished                0.018-0.035

Iron and Steel (not stainless)
   Steel, polished                      0.066
   Iron, polished                       0.14-0.38
   Cast Iron                            0.60-0.70
   Mild steel                           0.20-0.32
   Iron plate, rusted red               0.61
   sheet sheet, rough oxide layer       0.81

Lead
   unoxidized                           0.057-0.075
   gray oxidize                         0.28

Molybdenum
   filament                             0.096-0.202
   Massive, polished                    0.071

Nickel
   polished                             0.072
   nickel oxide                         0.59-0.86

Silver
   pure, polished                       0.0.020-0.032

 ------------------------------------------------------

Asbesto, board                          0.96

Brick
   red, rough, no gross irregularities  0.93
   fireclay                             0.75

Carbon
   filament                             0.53
   Rough plate                          0.77
   Lampblack                            0.84

Concrete tiles                          0.63

Glass
   smooth                               0.94
   pyrex, lead, and soda                0.95

Porcelain, glazed                       0.92

Quartz, rough, fused                    0.93

Roofing Paper                           0.91

Water                                   0.95


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