Standard substance for calibrating magnification of industrial computed tomography (CT) system

The invention relates to the technical field of the transmission of metering and testing standard quantity values, and particularly relates to a standard substance for calibrating magnification of an industrial CT system. The standard substance for calibrating magnification of an industrial CT system is characterized in that: a substrate of the standard substance is provided with a counter bore and a pilot hole; inside the counter bore is provided a sheet with a through hole, wherein the thickness of the sheet is 0.1 to 0.3 mm, the sheet is made of metal platinum alloy, and the aperture of the through hole is 0.2 to 0.5 mm. According to the invention, a scanning electron microscope with a certified standard substance is employed for measuring, so a certified standard substance for calibrating magnification of an industrial CT system is obtained, thereby solving the problem of lack of calibration in metering and testing magnification of the industrial CT system, providing a trace valueto the source for an imag