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Pyrometric Cones (Orton Standard)


  • Temperature Equivalent Chart
    (when heated at 150oC/hr*)


    Warning! Do not view cones above earthenware temperature with the naked eye as this may cause cataracts. View through welders goggles – sunglasses are not suitable as they filter out UV, but not the infra-red, which is the damaging wavelength in this case!

    Cone No. Centigrade Fahrenheit Visual Color
    022 600 1112 Dull Red
    021 614 1137
    020 635 1175
    019 683 1261
    018 717 1322
    017 747 1376
    016 792 1457
    015 804 1479
    014 838 1540
    013 852 1565
    012 884 1623 Cherry Red
    011 894 1641
    010 900 1652
    09 923 1693
    08 955 1751 Orange
    07 984 1803
    06 999 1830
    05 1046 1914
    04 1060 1940
    031/2 1080 1976
    03 1101 2014
    02 1120 2048
    01 1137 2079
    1 1154 2109 Yellow
    2 1162 2124
    3 1168 2134
    4 1186 2167
    5 1196 2185
    6 1222 2232
    7 1240 2264
    8 1263 2305
    9 1280 2336
    10 1305 2381 White
    11 1315 2399
    12 1326 2419
    13 1346 2455

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