Emissivity of Metals for Radiation Thermometry

It is necessary to find the emissivity of a specimen in order to measure the actual temperature of the object (specimen) through radiation thermometry. Radiation thermometers have been increasingly used in the manufacturing and working processes of metals, including steels, in recent years, with the prospect of wider application in the future. Since the emissivity of various metals in the heated stage is not yet clearly known, the emissivity of steel, Ti alloys, etc. for a Si radiation thermometer, most widely used at the present time, was experimentally measured.--AA