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Appendix
MarathonSeriesFA/FR 55
EMISSIVITY AT 1 µM FOR METALS
Aluminum Iron, cast
unoxidized 0.1-0.2 oxidized 0.9
oxidized 0.4 unoxidized 0.35
roughened 0.2-0.8 molten 0.35
polished 0.1-0.2 Magnesium 0.3-0.8
Brass Molybdenum
polished 0.35 oxidized 0.5-0.9
Burnished 0.65 unoxidized 0.25-0.35
Chromium 0.4 Monel (Ni-Cu) 0.3
Copper Nickel
polished 0.05 oxidized 0.8-0.9
roughened 0.05-0.2 electrolytic 0.2-0.4
oxidized 0.2-0.8 Silver 0.04
Gold 0.3 Steel
Haynes cold rolled 0.8-0.9
Alloy 0.5-0.9 polished sheet 0.35
Inconel molten 0.35
oxidized 0.4-0.9 oxidized 0.8-0.9
sandblasted 0.3-0.4 stainless 0.35
electropolished 0.2-0.5 Tin (unoxidized) 0.25
Iron Titan
oxidized 0.7-0.9 polished 0.5-0.75
unoxidized 0.35 Zinc
rusted 0.35 oxidized 0.6
polished 0.5
Table12:TypicalEmissivityValues(Metals)
EMISSIVITY AT 1 µM FOR NON-METALS
Asbestos 0.9
Ceramic 0.4
Concrete 0.65
Carbon
unoxidized 0.8-0.95
Graphite 0.8-0.9
Table13:TypicalEmissivityValues(Non‐Metals)