Appendix
Emissivity table (continue)
Material
Temperature
(
°C
)
Emissivity
approximation
Stainless steel
18-8
25
0.16
304(8Cr,18Ni)
215
~
490
0.44
~
0.36
310(25Cr,20Ni)
215
~
520
0.90
~
0.97
Tin
Commercial tin plate
100
0.07
Strong oxidization
0
~
200
0.60
Zinc
Oxidizing at 400°C
400
0.01
galvanized shining
iron plate
28
0.23
Ash zinc oxide
25
0.28
Non-metal materials
Brick
1100
0.75
Fire brick
1100
0.75
Graphite (lamp black)
96
~
225
0.95
Porcelain enamel
(white)
18
0.90
Asphaltum
0
~
200
0.85
Glass (surface)
23
0.94
Heat-resistance glass
200
~
540
0.85
~
0.95
Calcimine
20
0.90
Oak
20
0.90