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42 C.A1886
–C.A1888
Nickel
Polished by anodising
25 0.05
Electrolysed 20
0.01
Unpolished
Nickel wire
185
～
1010 0.09
～
0.19
Nickel sheet (oxidized)
198
～
600 0.37
～
0.48
Nickel oxide
650
～
1255 0.59
～
0.86
Nickel alloy
Nickel-chromium alloy
wire (shiny) (refractory)
50
～
1000 0.65
～
0.79
Nickel-chromium alloy
50
～
1040 0.64
～
0.76
Refractory nickel-
chromium
50
～
500 0.95
～
0.98
Nickel-silver alloy
100
0.14
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 tinplate
100
0.07
Highly oxidized
0
～
200
0.60
Zinc
Oxidation at 400°C
400
0.01
Shiny galvanized iron
plate
28 0.23
Oxidized zinc powder
25
0.28
Non-metallic materials
Brick 1100
0.75
Refractory brick
1100
0.75
Graphite (carbon black)
96
～
225
0.95
Enamel (white)
18
0.90
Asphalt
0
～
200
0.85
Glass (surface)
23
0.94
Refractory glass
200
～
540 0.85
～
0.95
Calcimine 20 0.90
Oak 20
0.90
