Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Nobuyasu Hatsuoka

Yoshiro Yamada

Tatsu Fujita

Atsuo Mizuta

Tetsuo Yamada

Tsugio Kaneda

Shinichi Shimazu

Noboru Yamakoshi

Shinzo Ashida

A spring steel for vehicles having a composition substantially composed of 0.5-0.7 wt % of C, 1.0-1.8 wt & of Si, 0.1-1.0 wt % of Mn, below 0.7 wt % of Cr, 0.03-0.5 wt % of V and the balance of Fe and normally present impurities, and optionally at least one of Al, Zr, Nb and Ti each contained in an amount of 0.02-0.1 wt %.

Spring steel for vehicles

A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.

High strength steel rod of large gauge

Method of producing large diameter steel rods

Growing community of inventors

Itami, Japan

Nobuyasu Hatsuoka