Kobe Steel, Ltd.

Masayuki Endo

Mikako Takeda

Shohei Nakakubo

Kazuhiko Kirihara

A method of manufacturing a steel wire material that contains 0.05%-1.2% C ('%' means '% by mass,' same hereinafter for chemical components.), 0.01%-0.7% Si, 0.1%-1.5% Mn, 0.02% max. P (not including 0%), 0.02% max. S (not including 0%), and 0.005% max. N (not including 0%), with the remainder being iron and unavoidable impurities. The steel wire material has a scale 6.0-20 &#x3bc;m thick and holes of an equivalent circle diameter of 1 &#x3bc;m max. in said scale that occupy 10% by area max. Said scale does not detach in the cooling process after hot rolling or during storage or transportation but can readily detach during mechanical descaling.

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Kakogawa, Japan

Masayuki Endo