Abstract
This investigation was conducted to evaluate “Vitallium” consisting of 26 Cr, 6 Mo, 66 Ni+Co (Co>20) and 1.0 C, or and 0.4 C, from the following aspects: variation in room temperature and high temperature-hardness and in short-time bending creep strength at 900° up to 7 hrs in cast alloys of varying analysis in as-cast or annealed state; interrelation of age-hardening properties, thermal expansivities, scaling and decarburization, and the chemical composition. The 31% Ni specimens provide the best as-cast creep strength, while the materials annealed at 1000° for 2 hrs exhibit the highest creep strength at 16% Ni.
