... EmissivityMetalsAlloys 20 -Ni, 24 -CR, 55-FE, 3 92 200 0.9Oxidized 20 -Ni, 24 -CR, 55-FE, 9 32 500 0.97Oxidized60-Ni, 1 2- CR, 28 -FE, 518 27 0 0.89Oxidized60-Ni, 1 2- CR, 28 -FE, 1040 560 0. 82 Oxidized80-Ni, 20 -CR, ... Film 72 22 0 .27 0.0 02 Film 72 22 0.460.005 Film 72 22 0. 72 Thick Film 72 22 0. 82 Oil, Linseed On Al Foil, uncoated 25 0 121 0.09On Al Foil, 1 coat 25 0 121 0.56On Al Foil, 2 coats 25 0 121 0.51On ... Introduction to Predictive Maintenance Nonmetals °F °C EmissivityGreens No. 521 0 -2 C 20 0–750 93–399 .89–. 82 Coating No. C20A 20 0–750 93–399 .73–.67Porcelain 72 22 0. 92 White Al2O3 20 0 93 0.9Zirconia...