Thermal expansion of some chromium-vanadium steels

Abstract

Data on the linear thermal expansion of several SAE chromium-vanadium steels have been published previously. The present paper gives the results of an investigation at this Bureau on the linear thermal expansion of two other SAE chromium-vanadium steels (SAE 1625 and 6150) in the annealed condition and in the quenched and tempered condition. These steels were investigated at various temperatures between 20° and 650°0. The coefficients of expansion of the hardened sample tempered at 400°F (204°0) or SOO°F (427°0) are less than the coefficients of expansion of the annealed sample. Tempering at 1,2000F (650 0 0) 'ncreased the expansion to that of the annealed sample. For the range from 20° to 650°0, the average coefficients of expansion of all of the samples investigated vary from 13.8XlO-a to 14.SXlO-a per degree centigrade. CONTENTS Page I. Introduction____ ______ __ __ _ __ _ __ __ _ _ __ _ _ _ _ __ _ ___ __ __ _ __ __ __ __ _ _ _ 25 II. Materials investigated_ _ _ __ _ _ _ _ __ __ __ ___ ____ _ _ _ __ __ __ _ __ _ _ __ _ ____ 25