Kobe Steel, Ltd.

Ken Ishida

Takuya Kochi

Shogo Murakami

Masao Toyama

Shoji Miyazaki

Fujio Koizumi

A hot-rolled wire rod excelling in wire drawability is provided, in which breakage can be suppressed even in heavy work from a large diameter. A hot-rolled wire rod contains C: 0.35 to 0.65% (percent by mass, hereinafter expressed as well), Si: 1.4 to 3.0%, Mn: 0.10 to 1.0%, Cr: 0.1 to 2.0%, P: 0.025% or less (exclusive of 0%), S: 0.025% or less (exclusive of 0%), N: 0.006% or less (exclusive of 0%), Al: 0.1% or less (exclusive of 0%), and O: 0.0030% or less (exclusive of 0%), with the remnant consisting of Fe and inevitable impurities; wherein the content of hydrogen in steel is 2.50 ppm (ppm by mass, hereinafter expressed as well) or less, and hardness (HV) is 460&#xd7;Cor less (Cindicates the content of C (percent by mass) in a position of depth of D/4 (D: diameter of the wire rod)).

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Kobe, Japan

Ken Ishida