Table of Emissivity Values

Table of Total Emissivity

These tables are presented for use as a guide when making infrared temperature measurements with the OMEGASCOPE or other infrared pyrometers. The total emissivity (e) for Metals, Non-metals and Common Building Materials are given. Since the emissivity of a material will vary as a function of temperature and surface finish, the values in these tables should be used only as a guide for relative or delta measurements. The exact emissivity of a material should be determined when absolute measurements are required.

Material Temp F (C) Emissivity Metals Alloys 20-Ni, 24-CR, 55-FE, Oxid. 392 (200) .90 20-Ni, 24-CR, 55-FE, Oxid. 932 (500) .97 60-Ni , 12-CR, 28-FE, Oxid. 518 (270) .89 60-Ni , 12-CR, 28-FE, Oxid. 1040 (560) .82 80-Ni, 20-CR, Oxidised 212 (100) .87 80-Ni, 20-CR, Oxidised 1112 (600) .87 80-Ni, 20-CR, Oxidised 2372 (1300) .89 Aluminium Unoxidised 77 (25) .02 Unoxidised 212 (100) .03 Unoxidised 932 (500) .06 Oxidised 390 (199) .11 Oxidised 1110 (599) .19 Oxidised at 599íC (1110íF) 390 (199) .11 Oxidised at 599íC (1110íF) 1110 (599) .19 Heavily Oxidised 200 (93) .20 Heavily Oxidised 940 (504) .31 Highly Polished 212 (100) .09 Roughly Polished 212 (100) .18 Commercial Sheet 212 (100) .09 Highly Polished Plate 440 (227) .04 Highly Polished Plate 1070 (577) .06 Bright Rolled Plate 338 (170) .04 Bright Rolled Plate 932 (500) .05 Alloy A3003, Oxidised 600 (316) .40 Alloy A3003, Oxidised 900 (482) .40 Alloy 1100-0 200-800 (93-427) .05 Alloy 24ST 75 (24) .09 Alloy 24ST, Polished 75 (24) .09 Alloy 75ST 75 (24) .11 Alloy 75ST, Polished 75 (24) .08 Bismuth, Bright 176 (80) .34 Bismuth, Unoxidised 77 (25) .05 Bismuth, Unoxidised 212 (100) .06 Brass 73% Cu, 27% Zn, Polished 476 (247) .03 73% Cu, 27% Zn, Polished 674 (357) .03 62% Cu, 37% Zn, Polished 494 (257) .03 62% Cu, 37% Zn, Polished 710 (377) .04 83% Cu, 17% Zn, Polished 530 (277) .03 Matte 68 (20) .07 Burnished to Brown Colour 68 (20) .40 Cu-Zn, Brass Oxidised 392 (200) .61 Cu-Zn, Brass Oxidised 752 (400) .60 Cu-Zn, Brass Oxidised 1112 (600) .61 Unoxidised 77 (25) .04 Unoxidised 212 (100) .04 Cadmium 77 (25) .02 Carbon Lampblack 77 (25) .95 Unoxidised 77 (25) .81 Unoxidised 212 (100) .81 Unoxidised 932 (500) .79 Candle Soot 250 (121) .95 Filament 500 (260) .95 Graphitized 212 (100) .76 Graphitized 572 (300) .75 Graphitized 932 (500) .71 Chromium 100 (38) .08 Chromium 1000 (538) .26 Chromium, Polished 302 (150) .06 Cobalt, Unoxidised 932 (500) .13 Cobalt, Unoxidised 1832 (1000) .23 Columbium, Unoxidised 1500 (816) .19 Columbium, Unoxidised 2000 (1093) .24 Copper Cuprous Oxide 100 (38) .87 Cuprous Oxide 500 (260) .83 Cuprous Oxide 1000 (538) .77 Black, Oxidised 100 (38) .78 Etched 100 (38) .09 Matte 100 (38) .22 Roughly Polished 100 (38) .07 Polished 100 (38) .03 Highly Polished 100 (38) .02 Rolled 100 (38) .64 Rough 100 (38) .74 Molten 1000 (538) .15 Molten 1970 (1077) .16 Molten 2230 (1221) .13 Nickel Plated 100-500 (38-260) .37 Dow Metal 0.4-600 (╨18-316) .15 Gold Enamel 212 (100) .37 Plate (.0001) Plate on .0005 Silver 200-750 (93-399) .11-.14 Plate on .0005 Nickel 200-750 (93-399) .07-.09 Polished 100-500 (38-260) .02 Polished 1000-2000 (538-1093) .03 Haynes Alloy C, Oxidised 600-2000 (316-1093) .90-.96 Haynes Alloy 25, Oxidised 600-2000 (316-1093) .86-.89 Haynes Alloy X, Oxidised 600-2000 (316-1093) .85-.88 Inconel Sheet 1000 (538) .28 Inconel Sheet 1200 (649) .42 Inconel Sheet 1400 (760) .58 Inconel X, Polished 75 (24) .19 Inconel B, Polished 75 (24) .21 Iron Oxidised 212 (100) .74 Oxidised 930 (499) .84 Oxidised 2190 (1199) .89 Unoxidised 212 (100) .05 Red Rust 77 (25) .70 Rusted 77 (25) .65 Liquid 2760-3220 (1516-1771) .42-.45 Cast Iron Oxidised 390 (199) .64 Oxidised 1110 (599) .78 Unoxidised 212 (100) .21 Strong Oxidation 40 (104) .95 Strong Oxidation 482 (250) .95 Liquid 2795 (1535) .29 Wrought Iron Dull 77 (25) .94 Dull 660 (349) .94 Smooth 100 (38) .35 Polished 100 (38) .28 Lead Polished 100-500 (38-260) .06-.08 Rough 100 (38) .43 Oxidised 100 (38) .43 Oxidised at 1100íF 100 (38) .63 Gray Oxidised 100 (38) .28 Magnesium 100-500 (38-260) .07-.13 Magnesium Oxide 1880-3140 (1027-1727) .16-.20 Mercury 32 (0) .09 " 77 (25) .10 " 100 (38) .10 " 212 (100) .12 Molybdenum 100 (38) .06 " 500 (260) .08 " 1000 (538) .11 " 2000 (1093) .18 " Oxidised at 1000íF 600 (316) .80 " Oxidised at 1000íF 700 (371) .84 " Oxidised at 1000íF 800 (427) .84 " Oxidised at 1000íF 900 (482) .83 " Oxidised at 1000íF 1000 (538) .82 Monel, Ni-Cu 392 (200) .41 Monel, Ni-Cu 752 (400) .44 Monel, Ni-Cu 1112 (600) .46 Monel, Ni-Cu Oxidised 68 (20) .43 Monel, Ni-Cu Oxid. at 1110íF 1110 (599) .46 Nickel Polished 100 (38) .05 Oxidised 100-500 (38-260) .31-.46 Unoxidised 77 (25) .05 Unoxidised 212 (100) .06 Unoxidised 932 (500) .12 Unoxidised 1832 (1000) .19 Electrolytic 100 (38) .04 Electrolytic 500 (260) .06 Electrolytic 1000 (538) .10 Electrolytic 2000 (1093) .16 Nickel Oxide 1000-2000 (538-1093) .59-.86 Palladium Plate (.00005 on .0005 silver) 200-750 (93-399) .16-.17 Platinum 100 (38) .05 " 500 (260) .05 " 1000 (538) .10 Platinum, Black 100 (38) .93 " 500 (260) .96 " 2000 (1093) .97 " Oxidised at 1100íF 500 (260) .07 " 1000 (538) .11 Rhodium Flash (0.0002 on 0.0005 Ni) 200-700 (93-371) .10-.18 Silver Plate (0.0005 on Ni) 200-700 (93-371) .06-.07 Polished 100 (38) .01 " 500 (260) .02 " 1000 (538) .03 " 2000 (1093) .03 Steel Cold Rolled 200 (93) .75-.85 Ground Sheet 1720-2010 (938-1099) .55-.61 Polished Sheet 100 (38) .07 " 500 (260) .10 " 1000 (538) .14 Mild Steel, Polished 75 (24) .10 Mild Steel, Smooth 75 (24) .12 Mild Steel, ╩Liquid 2910-3270 (1599-1793) .28 Steel, Unoxidised 212 (100) .08 Steel, Oxidised 77 (25) .80 Steel Alloys Type 301, Polished 75 (24) .27 Type 301, Polished 450 (232) .57 Type 301, Polished 1740 (949) .55 Type 303, Oxidised 600-2000 (316-1093) .74-.87 Type 310, Rolled 1500-2100 (816-1149) .56-.81 Type 316, Polished 75 (24) .28 Type 316, Polished 450 (232) .57 Type 316, Polished 1740 (949) .66 Type 321 200-800 (93-427) .27-.32 Type 321 Polished 300-1500 (149-815) .18-.49 Type 321 w/BK Oxide 200-800 (93-427) .66-.76 Type 347, Oxidised 600-2000 (316-1093) .87-.91 Type 350 200-800 (93-427) .18-.27 Type 350 Polished 300-1800 (149-982) .11-.35 Type 446, Polished 300-1500 (149-815) .15-.37 Type 17-7 PH 200-600 (93-316) .44-.51 Type 17-7 PH ╩Polished 300-1500 (149-815) .09-.16 Type C1020, ╩Oxidised 600-2000 (316-1093) .87-.91 Type PH-15-7 MO 300-1200 (149-649) .07-.19 Stellite, Polished 68 (20) .18 Tantalum, Unoxidised 1340 (727) .14 " 2000 (1093) .19 " 3600 (1982) .26 " 5306 (2930) .30 Tin, Unoxidised 77 (25) .04 " 212 (100) .05 Tinned Iron, Bright 76 (24) .05 " 212 (100) .08 Titanium Alloy C110M, Polished 300-1200 (149-649) .08-.19 " Oxidised at 538C (1000F) 200-800 (93-427) .51-.61 Alloy Ti-95A, Oxid. at 538C (1000F) 200-800 (93-427) .35-.48 Anodized onto SS 200-600 (93-316) .96-.82 Tungsten Unoxidised 77 (25) .02 Unoxidised 212 (100) .03 Unoxidised 932 (500) .07 Unoxidised 1832 (1000) .15 Unoxidised 2732 (1500) .23 Unoxidised 3632 (2000) .28 Filament (Aged) 100 (38) .03 Filament (Aged) 1000 (538) .11 Filament (Aged) 5000 (2760) .35 Uranium Oxide 1880 (1027) .79 Zinc Bright, Galvanised 100 (38) .23 Commercial 99.1% 500 (260) .05 Galvanised 100 (38) .28 Oxidised 500-1000 (260-538) .11 Polished 100 (38) .02 Polished 500 (260) .03 Polished 1000 (538) .04 Polished 2000 (1093) .06 Non-Metals Adobe 68 (20) .90 Asbestos Board 100 (38) .96 Cement 32-392 (0-200) .96 Cement, Red 2500 (1371) .67 Cement, White 2500 (1371) .65 Cloth 199 (93) .90 Paper 100-700 (38-371) .93 Slate 68 (20) .97 Asphalt, pavement 100 (38) .93 Asphalt, tar paper 68 (20) .93 Basalt 68 (20) .72 Brick Red, rough 70 (21) .93 Gault Cream 2500-5000 (1371-2760) .26-.30 Fire Clay 2500 (1371) .75 Light Buff 1000 (538) .80 Lime Clay 2500 (1371) .43 Fire Brick 1832 (1000) .75-.80 Magnesite, Refractory 1832 (1000) .38 Grey Brick 2012 (1100) .75 Silica, Glazed 2000 (1093) .88 Silica, Unglazed 2000 (1093) .80 Sandlime 2500-5000 (1371-2760) .59-.63 Carborundum 1850 (1010) .92 Ceramic Alumina on Inconel 800-2000 (427-1093) .69-.45 Earthenware, Glazed 70 (21) .90 Earthenware, Matte 70 (21) .93 Greens No. 5210-2C 200-750 (93-399) .89-.82 Coating No. C20A 200-750 (93-399) .73-.67 Porcelain 72 (22) .92 White Al2O3 200 (93) .90 Zirconia on Inconel 800-2000 (427-1093) .62-.45 Clay 68 (20) .39 " Fired 158 (70) .91 " Shale 68 (20) .69 " Tiles, Light Red 2500-5000 (1371-2760) .32-.34 " Tiles, Red 2500-5000 (1371-2760) .40-.51 " Tiles, Dark Purple 2500-5000 (1371-2760) .78 Concrete Rough 32-2000 (0-1093) .94 Tiles, Natural 2500-5000 (1371-2760) .63-.62 " Brown 2500-5000 (1371-2760) .87-.83 " Black 2500-5000 (1371-2760) .94-.91 Cotton Cloth 68 (20) .77 Dolomite Lime 68 (20) .41 Emery Corundum 176 (80) .86 Glass Convex D 212 (100) .80 Convex D 600 (316) .80 Convex D 932 (500) .76 Nonex 212 (100) .82 Nonex 600 (316) .82 Nonex 932 (500) .78 Smooth 32-200 (0-93) .92-.94 Granite 70 (21) .45 Gravel 100 (38) .28 Gypsum 68 (20) .80-.90 Ice, Smooth 32 (0) .97 Ice, Rough 32 (0) .98 Lacquer Black 200 (93) .96 Blue, on Al Foil 100 (38) .78 Clear, on Al Foil (2 coats) 200 (93) .08 (.09) Clear, on Bright Cu 200 (93) .66 Clear, on Tarnished Cu 200 (93) .64 Red, on Al Foil (2 coats) 100 (38) .61 (.74) White 200 (93) .95 White, on Al Foil (2 coats) 100 (38) .69 (.88) Yellow, on Al Foil (2 coats) 100 (38) .57 (.79) Lime Mortar 100-500 (38-260) .90-.92 Limestone 100 (38) .95 Marble, White 100 (38) .95 " Smooth, White 100 (38) .56 " Polished Grey 100 (38) .75 Mica 100 (38) .75 Oil on Nickel 0.001 Film 72 (22) .27 0.002 " 72 (22) .46 0.005 " 72 (22) .72 Thick " 72 (22) .82 Oil, Linseed On Al Foil, uncoated 250 (121) .09 On Al Foil, 1 coat 250 (121) .56 On Al Foil, 2 coats 250 (121) .51 On Polished Iron, .001 Film 100 (38) .22 On Polished Iron, .002 Film 100 (38) .45 On Polished Iron, .004 Film 100 (38) .65 On Polished Iron, Thick Film 100 (38) .83 Paints Blue, Cu2O3 75 (24) .94 Black, CuO 75 (24) .96 Green, Cu2O3 75 (24) .92 Red, Fe2O3 75 (24) .91 White, Al2O3 75 (24) .94 White, Y2O3 75 (24) .90 White, ZnO 75 (24) .95 White, MgCO3 75 (24) .91 White, ZrO2 75 (24) .95 White, ThO2 75 (24) .90 White, MgO 75 (24) .91 White, PbCO3 75 (24) .93 Yellow, PbO 75 (24) .90 Yellow, PbCrO4 75 (24) .93 Paints, Aluminium 100 (38) .27-.67 10% Al 100 (38) .52 26% Al 100 (38) .30 Dow XP-310 200 (93) .22 Paints, Bronze Low .34-.80 Gum Varnish (2 coats) 70 (21) .53 Gum Varnish (3 coats) 70 (21) .50 Cellulose Binder (2 coats) 70 (21) .34 Paints, Oil All colours 200 (93) .92-.96 Black 200 (93) .92 Black Gloss 70 (21) .90 Camouflage Green 125 (52) .85 Flat Black 80 (27) .88 Flat White 80 (27) .91 Grey-Green 70 (21) .95 Green 200 (93) .95 Lamp Black 209 (98) .96 Red 200 (93) .95 White 200 (93) .94 Quartz, Rough, Fused 70 (21) .93 Glass, 1.98 mm 540 (282) .90 Glass, 1.98 mm 1540 (838) .41 Glass, 6.88 mm 540 (282) .93 Glass, 6.88 mm 1540 (838) .47 Opaque 570 (299) .92 Opaque 1540 (838) .68 Red Lead 212 (100) .93 Rubber, Hard 74 (23) .94 Rubber, Soft, Grey 76 (24) .86 Sand 68 (20) .76 Sandstone 100 (38) .67 Sandstone, Red 100 (38) .60-.83 Sawdust 68 (20) .75 Shale 68 (20) .69 Silica,Glazed 1832 (1000) .85 Silica, Unglazed 2012 (1100) .75 Silicon Carbide 300-1200 (149-649) .83-.96 Silk Cloth 68 (20) .78 Slate 100 (38) .67-.80 Snow, Fine Particles 20 (╨7) .82 Snow, Granular 18 (╨8) .89 Soil Surface 100 (38) .38 Black Loam 68 (20) .66 Plowed Field 68 (20) .38 Soot Acetylene 75 (24) .97 Camphor 75 (24) .94 Candle 250 (121) .95 Coal 68 (20) .95 Stonework 100 (38) .93 Water 100 (38) .67 Waterglass 68 (20) .96 Wood Low .80-.90 Beech P!aned 158 (70) .94 Oak, Planed 100 (38) .91 Spruce, Sanded 100 (38) .89

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