The x‐ray absorption coefficients of the metals Al, Ti, Fe, Ni, Cu, and Zn have been measured for radiations in the 1.5–3‐keV range. Monochromatic x rays were obtained by diffracting characteristic x‐ray lines with a crystal. Freedom from fluorescent radiation was ensured by using crystals of low‐Zmaterial. The absorber thicknesses as well as the time distributions between measuringIandI0were optimized. The average of nine transmission measurements taken with the absorber in nine different positions was used in computing the absorption coefficients for each element. Comparison of absorption coefficients obtained with different absorbers of the same element indicates an experimental uncertainty of 1–4%.