Patent ID: 8668783

Claim:
A steel wire rod comprising: 0.4 to 1.3% of C (mass percent, hereinafter same for steel composition), 0.1 to 2.5% of Si, 0.2 to 1.0% of Mn, and 0.003% or less of Al (exceeding 0%); wherein oxide base inclusions in any section comprising an axis line of the steel wire rod have a width of 2 μm or more perpendicular to a direction of the axis line, and satisfy following composition X, wherein composition X has, when a composition of inclusions is converted to Al 2 O 3 +MgO+CaO+SiO 2 +MnO=100% (mass percent, hereinafter same for inclusions), Al 2 O 3 +CaO+SiO 2 ≧70%; and a number of the oxide base inclusions satisfying following composition A is in a range of from 2.9 to 20 per 100 mm 2 section, and the number of the oxide base inclusions satisfying following composition B is less than 1 per 100 mm 2 section, wherein composition A has, when the composition of inclusions is converted to Al 2 O 3 +CaO+SiO 2 =100%, 20% CaO≦50% and Al 2 O 3 ≦30%; and composition B has, when the composition of inclusions is converted to Al 2 O 3 +CaO+SiO 2 =100%, CaO>50%, wherein a drawability of the steel wire rod is in a range of from 2.0 to 6.0 where the drawability is defined by a number of disconnections per 10 tons when the wire rod is subjected to drawing from 5.5 mm in diameter to 0.2 mm in diameter.