Fluke Ti20 User Manual download pdf (Page 63)

Appendices

Typical Emissivity Values C

C-3

Table C-1. Emissivity Values for Metals (cont)

Emissivity

Material

1.0 µm 1.6 µm 8 to14 µm

Iron, Cast

Oxidized 0.7-0.9 0.7-0.9 0.6-0.95

Unoxidized 0.35 0.3 0.2

Molten 0.35 0.3-0.4 0.2-0.3

Iron, Wrought

Dull 0.9 0.9 0.9

Lead

Polished 0.35 0.05-0.2 n.r.

Rough 0.65 0.6 0.4

Oxidized n.r. 0.3-0.7 0.2-0.6

Magnesium 0.3-0.8 0.05-0.3 n.r.

Mercury n.r. 0.05-0.15 n.r.

Molybdenum

Oxidized 0.5-0.9 0.4-0.9 0.2-0.6

Unoxidized 0.25-0.35 0.1-0.35 0.1

Monel (Ni-Cu) 0.3 0.2-0.6 0.1-0.14

Nickel

Oxidized 0.8-0.9 0.4-0.7 0.2-0.5

Electrolytic 0.2-0.4 0.1-0.3 n.r.

Platinum

Black n.r. 0.95 0.9

Silver n.r. 0.02 n.r.

Steel

Cold-Rolled 0.8-0.9 0.8-0.9 0.7-0.9

Ground Sheet n.r. n.r. 0.4-0.6

Polished Sheet 0.35 0.25 0.1

Molten 0.35 0.25-0.4 n.r.

Oxidized 0.8-0.9 0.8-0.9 0.7-0.9

Stainless 0.35 0.2-0.9 0.1-0.8

1 2 ... 58 59 60 61 62 63 64 65 66 67 68

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