RayTek operating instructions Marathon Series FA/FR55, Typical Emissivity Values Metals

Appendix

EMISSIVITY AT 1 µM FOR METALS

Aluminum
unoxidized	0.1-0.2
oxidized	0.4
roughened	0.2-0.8
polished	0.1-0.2
Brass
polished	0.35
Burnished	0.65
Chromium	0.4
Copper
polished	0.05
roughened	0.05-0.2
oxidized	0.2-0.8
Gold	0.3
Haynes
Alloy	0.5-0.9
Inconel
oxidized	0.4-0.9
sandblasted	0.3-0.4
electropolished	0.2-0.5
Iron
oxidized	0.7-0.9
unoxidized	0.35
rusted	0.35

Iron, cast oxidized unoxidized molten

Magnesium

Molybdenum oxidized unoxidized

Monel (Ni-Cu) Nickel

oxidized electrolytic

Silver

Steel

cold rolled polished sheet molten oxidized stainless

Tin (unoxidized) Titan

polished Zinc

oxidized polished

0.9

0.35

0.35

0.3-0.8

0.5-0.9

0.25-0.35

0.3

0.8-0.9

0.2-0.4

0.04

0.8-0.9

0.35

0.35

0.8-0.9

0.35

0.25

0.5-0.75

0.6

0.5

Table 12: Typical Emissivity Values (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

Table 13: Typical Emissivity Values (Non‐Metals)

Marathon Series FA/FR55