Oxidized
200°C ... 600°C
0.80
strongly oxidized
50°C
500°C
0.88
0.98
Newly-rolled
20°C
0.24
Rough, flat surface
50°C
0.95 ... 0.98
rusty, redt
20°C
0.69
sheet
950°C ... 1100°C
0.55 ... 0.61
sheet, Nickel-
coated
20°C
0.11
sheet, polished
750°C ... 1050°C
0.52 ... 0.56
sheet, rolled
50°C
0.56
rustless, rolled
700°C
0.45
rustless, sand-
blasted
700°C
0.70
Cast Iron
poured
50°C
1000°C
0.81
0.95
liquid
1300°C
0.28
at 600°C oxidized
200°C ... 600°C
0.64 ... 0.78
polished
200°C
0.21
Tin
burnish
20°C ... 50°C
0.04 ... 0.06
Titanium
at 540°C oxidized
200°C
500°C
1000°C
0.40
0.50
0.60
polished
200°C
500°C
1000°C
0.15
0.20
0.36
Wolfram
-
200°C
600°C ... 1000°C
0.05
0.1 ... 0.16
Heating wire
3300°C
0.39
Zinc
at 400°C oxidized
400°C
0.11
oxidized surface
1000°C ... 1200°C
0.50 ... 0.60
Polished
200°C ... 300°C
0.04 ... 0.05
sheet
50°C
0.20
Zirconium
Zirconium oxide,
Powder
normal temperature
0.16 ... 0.20
Zirconium silicate,
Powder
normal temperature
0.36 ... 0.42
Asbestos
tablet
20°C
0.96
Paper
40°C ... 400°C
0.93 ... 0.95
Powder
normal temperature
0.40 ... 0.60
slate
20°C
0.96
-55-
