User Manual

APPENDIX II – Emissivity table
Material Specification Temp. °C
Spectrum
Emissivity Ref.
Stainless steel
18-8
25
0.16
Stainless steel
304(8Cr, 18Ni)
215
～
490
0.44
～
0.36
Stainless steel
310(25Cr, 20Ni)
215
～
520
0.90
～
0.97
Nickel alloys
Nickel-chromium alloy wire (shiny) (refractory)
50
～
1000
0.65
～
0.79
Nickel alloys
Nickel-chromium alloy
50
～
1040
0.64
～
0.76
Nickel alloys
Refractory nickel-chromium
50
～
500
0.95
～
0.98
Nickel alloys
Nickel-silver alloy
100
0.14
Aluminium
Polished aluminium
100
0.09
Aluminium
Commercial aluminium sheet
100
0.09
Aluminium
Oxidized anodized aluminium-chromium
25
～
600
0.55
Aluminium
Slightly oxidized aluminium
25
～
600
0.10
～
0.20
Aluminium
Highly oxidized aluminium
25
～
600
0.30
～
0.40
Aluminium
Anodized, light grey, matte
70
LW: 8 - 14 µm
0.97
9
Road asphalt
4
LLW: 6,5 - 20 µm
0.96
8
Concrete
20
T: total spectrum
0.92
2
Wood
planed oak
20
T: total spectrum
0.90
2
Brick
Red
20
T: total spectrum
0.93
2
Brick
Refractory brick
1100
0.75
Calcimine
20
0.9
Rubber
hard
20
T: total spectrum
0.95
1
Chromium
Polished chromium
40
～
1090
0.08
～
0.36
Copper
Shiny copper
100
0.05
Copper
Highly oxidized copper
25
0.78
Copper
Liquid copper
1080
～
1280
0.16
～
0.13
Copper
Oxidized
50
T: total spectrum
0.6 – 0.7
1
Water
0.96
Enamel (white)
18
0.9
Tin
Commercial tinplate
100
0.07
Tin
High oxidation
0
～
200
0.6
Iron and steel
highly oxidized
50
T: total spectrum
0.88
1
Graphite (carbon black)
96
～
225
0.95
Brass
Shiny brass (extreme polishing)
28
0.03
Brass
Brass oxide
200
～
600
0.61
～
0.59
Magnesium
Magnesia
275
～
825
0.55
～
0.20
Magnesium
Magnesia
900
～
1670
0.2
Magnesium
Mercury
0
～
100
0.09
～
0.12
Nickel
Polished by anodizing
25
0.05
Nickel
Electrolyzed
20
0.01
Nickel
Nickel wire
185
～
1,010
0.09
～
0.19
Nickel
Nickel foil (oxidized)
198
～
600
0.37
～
0.48
Nickel
Nickel oxide
650
～
1,255
0.59
～
0.86
Gold
Shiny gold
230
～
630
0.02
Paint
8 different colours and grades
70
LW: 8 - 14 µm
0.92 – 0.94
9
Plastic
PVC, plastic flooring, matte, structured
70
LW: 8 - 14 µm
0.93
9
Plaster
unfinished covering
20
T: total spectrum
0.91
2
Plaster
plaster tile
0.87
10
Lead
Pure lead (without oxidation)
125
～
225
0.06
～
0.08
Lead
Slightly oxidized
25
～
300
0.20
～
0.45
Terra cotta tile
0.88
10
Glass (surface)
23
0.94
Refractory glass
200
～
540
0.85
～
0.95
Zinc
Oxidation at 400°C
400
0.01
Zinc
Shiny plate of galvanized iron
28
0.23
Zinc
Oxidized zinc powder
25
0.28