Shinko Kosen Kogyo Kabushiki Kaisha

Toshiki Suwa

Nobuhiko Ibaraki

Yukio Yamaoka

Masato Kaiso

Masaru Kodama

Masao Yamada

A high strength steel strand for PC of a wire material having a pearlite structure and containing 0.80 to 1.30% of C, 0.60 to 2.50% of Si and 0.30 to 1.50% of Mn, remainder being Fe and unavoidable impurities, wherein a cementite portion of the wire material comprises a mixed structure of fibrous cementite and granular cementite, the volumetric proportion of the granular cementite to the total cementite is 10 to 40%, the particle diameter of the granular cementite is 40 to 300.ANG., and the strand has a tensile strength of 235 kgf/mm.sup.2 or higher and an elongation of 3.5% or greater.

Growing community of inventors

Amagasaki, Japan

Toshiki Suwa