PHYSICAL AND MECHANICAL PROPERTIES OF REACTOR MATERIALS.

High temperature (to 3000 deg C) physical and mechanical properties for commercially available and newly developed materials being considered for use in high temperature reactors were measured. Creep, stress rupture, ductility, microstructure, and failure mechanism for tungsten were determined. Values were found for creep of as cast Mo; creep rupture of Re, Mo - Re - W, Mo - W, and Re - W; thermal conductivity and electrical resistivity of Re - W; and enthalpies, heat content and heat capacity of W. (F.S.)