User's Manual

23
Appendix A
Emissivity of common materials (for reference
only)
Material name
Surface condition
Temperature（℃）
Emissivity（ε）
aluminum
non-oxidizing
100
0.20
oxidation
100
0.55
brass
polished brown
20
0.40
matt
38
0.22
oxidation
100
0.61
copper
severely oxidized
20
0.78
iron
oxidation
100
0.74
rust
25
0.65
cast iron
oxidized
200
0.64
not oxidized
100
0.21
wrought iron
hairy
25
0.94
polished
38
0.28
nickel
oxidized
200
0.37
stainless steel
oxidation
60
0.85
steel
oxidation at 800°C
200
0.79
general brick
surface
20
0.93
concrete
surface
20
0.92
glass
polished flat
20
0.94
paint
white
100
0.92
natural black
100
0.97
carbon
smoke black
25
0.95
candle smoke
20
0.95
graphite rough
surface
20
0.98
paint
16 colors average
100
0.94
paper
white
20
0.93
sandy soil
surface
20
0.90
wood
planed
20
0.90
water
distilled water
20
0.96
skin
humanity
32
0.98
ceramics
thin
21
0.90
thick
21
0.93