Page 207 - Intro Predictive Maintenance

198 An Introduction to Predictive Maintenance

Material °F °C Emissivity
Tungsten Unoxidized 77 25 0.02
Unoxidized 212 100 0.03
Unoxidized 932 500 0.07
Unoxidized 1832 1000 0.15
Unoxidized 2732 1500 0.23
Unoxidized 3632 2000 0.28
Filament (Aged) 100 38 0.03
Filament (Aged) 1000 538 0.11
Filament (Aged) 5000 2760 0.35
Uranium Oxide 1880 1027 0.79
Zinc Bright, Galvanized 100 38 0.23
Commercial 99.1% 500 260 0.05
Galvanized 100 38 0.28
Oxidized 500–1000 260–538 0.11
Polished 100 38 0.02
Polished 500 260 0.03
Polished 1000 538 0.04
Polished 2000 1093 0.06

Nonmetals
Adobe 68 (20) 0.9
Asbestos Board 100 38 0.96
Cement 32–392 0–200 0.96
Cement, Red 2500 1371 0.67
Cement, White 2500 1371 0.65
Cloth 199 93 0.9
Paper 100–700 38–371 0.93
Slate 68 20 0.97
Asphalt, pavement 100 38 0.93
Asphalt, tar paper 68 20 0.93
Basalt 68 20 0.72
Brick Red, rough 70 21 0.93
Gault Cream 2500–5000 1371–2760 .26–.30
Fire Clay 2500 1371 0.75
Light Buff 1000 538 0.8
Lime Clay 2500 1371 0.43
Fire Brick 1832 1000 .75–.80
Magnesite, Refractory 1832 1000 0.38
Grey Brick 2012 1100 0.75
Silica, Glazed 2000 1093 0.88
Silica, Unglazed 2000 1093 0.8
Sandlime 2500–5000 1371–2760 .59–.63
Carborundum 1850 1010 0.92
Ceramic Alumina on Inconel 800–2000 427–1093 .69–.45
Earthenware, Glazed 70 21 0.9
Earthenware, Matte 70 21 0.93