Abstract
As one method of expressing rupture characteristics of steels, states of rupture can be used.
In this report, the author compared and studied the states of nominal stress-convertional strain-curve and elongation percentage etc. described in No. 2 report, thus obtaining characteristics of high-temperature high-speed deformation of various steels.
The γ-α-embrittlement, the 900°C-embrittlement recognized in the course of these experiments were also made clear.
By performing high-speed tension test at the super-high temp. of 1250°C up to the melting point, the author further discovered that deforming resistance uniformly continued to decrease until it reached the melting point.
