RayTek ThermoView Ti30 - Manual (Page 68)

Table 1. Emissivity Values for Metals
Material Emissivity
1.0µm 1.6µm 8-14µm
Aluminum
Unoxidized 0.1-0.2 0.02-0.2 n.r.
Oxidized 0.4 0.4 0.2-0.4
Alloy A3003,
Oxidized n.r. 0.4 0.3
Roughened 0.2-0.8 0.2-0.6 0.1-0.3
Polished 0.1-0.2 0.02-0.1 n.r.
Brass
Polished 0.8-0.95 0.01-0.05 n.r.
Burnished n.r. n.r. 0.3
Oxidized 0.6 0.6 0.5
Chromium 0.4 0.4 n.r.
Copper
Polished n.r. 0.03 n.r.
Roughened n.r. 0.05-0.2 n.r
Oxidized 0.2-0.8 .2-0.9 0.4-0.8
Electrical Terminal Blocks n.r. n.r. 0.6
Gold 0.3 0.01-0.1 n.r.
Haynes Alloy 0.5-0.9 0.6-0.9 0.3-0.8
Inconel
Oxidized 0.4-0.9 0.6-0.9 0.7-0.95
Sandblasted 0.3-0.4 0.3-0.6 0.3-0.6
Electropolished 0.2-0.5 0.25 0.15
Iron
Oxidized 0.4-0.8 0.5-0.9 0.5-0.9
Unoxidized 0.35 0.1-0.3 n.r.
Rusted n.r. 0.6-0.9 0.5-0.7
Molten 0.35 0.4-0.6 n.r.
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
July 1, 2003 - 68 - Version 1.0
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