Provided is a small-sized cylindrical battery in which improvement in battery characteristics and improvement in long-term reliability and safety are both realized. The cylindrical battery includes: a bottomed cylindrical battery case 1, an electrode group...

A super clean steel for use in objects subjected to heavy loads in all directions, such as in fuel injection pumps or bearings, comprising, in weight, O max. 7 ppm, Ti max. 15 ppm, and S between about 8 ppm and about 12 ppm, and having a K1(total) value ac...