Abstract: A high-strength flat steel wire contains, by mass %: C: 0.25 to 0.60%; Si: greater than 0.50% and less than 2.0%; Mn: 0.20 to 1.50%; S: 0.015% or less; P: 0.015% or less; Cr: 0.005 to 1.50%; Al: 0.005 to 0.080%; N: 0.0020 to 0.0080%; and one or two of Ca: 0 to 0.0050% and Mg: 0 to 0.0050% to satisfy [Ca]+[Mg]>0.20×[S], with the balance composed of Fe and impurities, the high-strength flat steel wire has tensile strength of 1000 MPa or more, an average value of Hv hardness measured in a cross section perpendicular to a longitudinal direction of 320 or more and less than 450, a standard deviation ?Hv of the measured value of 15 or less, and a width/thickness ratio of not less than 1.5 nor more than 10. [Ca], [Mg], and [S] represent contents of respective elements by mass %.

Abstract: A steel cord is obtained by bundling five steel core wires, which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive having a thickness Ad of less than 15 ?m. Each of the core wires-constituting the steel cord has a diameter d of less than 0.45 mm, and spacing Gd between the core wires is less than 20 ?m. The core wires used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.

Abstract: A steel cord is obtained by bundling five steel core wires, which are arrayed in parallel with one another in a plane, into a unitary body by means of an adhesive having a thickness Ad of less than 15 ?m. Each of the core wires-constituting the steel cord has a diameter d of less than 0.45 mm, and spacing Gd between the core wires is less than 20 ?m. The core wires used have a free coil diameter D that is greater than wire diameter d thereof by 750 times or more.

Abstract: This invention provides a plated metal wire excellent in corrosion resistance and resistance to the cracking and peeling of a plated layer and/or a plated alloy layer during working, subjected to hot dip zinc alloy plating and used for outdoor and exposed structures such as wire mesh for construction, net cages for revetments, fishing nets, outdoor fences, etc., a method for producing the plated metal wire, and an apparatus for carrying out the method. The present invention relates to a plated metal wire characterized in that; the region where at least 3 projections, each 3 &mgr;m or more in height, per 1 mm along its circumference exist occupies 10% or more of the circumference, and the circumference having the projections thus distributed occupies 10% or more of any given portion along the length of the metal wire; and a method and an apparatus for producing the plated metal wire.

Abstract: The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, etc.

Abstract: This invention provides a plated steel wire with high corrosion resistance and excellent workability, wherein the average composition of the plating alloy in the plated steel wire comprises, in terms of weight percentage, Al: 4-20%, Mg: 0.8-5%, and if necessary one or more from among Si: ≦2%, Na: 0.001-0.1% and Ti: 0.01-0.1%, with the remainder Zn, and an Fe—Zn alloy layer of no greater than 20 &mgr;m thickness is present at the plating-base metal interface; it is produced by coating a steel wire with a molten zinc plating composed mainly of zinc as the first stage and then.coating it with a molten zinc alloy plating with the aforementioned average composition as the second stage. The maximum plating bath immersion time is 20 seconds, and the part of the plated steel wire drawn out from the plating bath is purged with nitrogen gas.

Abstract: This invention provides a plated metal wire excellent in corrosion resistance and resistance to the cracking and peeling of a plated layer and/or a plated alloy layer during working, subjected to hot dip zinc alloy plating and used for outdoor and exposed structures such as wire mesh for construction, net cages for revetments, fishing nets, outdoor fences, etc., a method for producing the plated metal wire, and an apparatus for carrying out the method.

Abstract: The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, etc.

Abstract: The present invention provides a high carbon steel wire remarkably excellent in wire-drawability and fatigue resistance after wire drawing with a low cost due to reduced use of costly alloys. A high carbon steel wire according to the present invention is one excellent in wire-drawability and fatigue resistance after wire drawing, characterized in that; the total oxygen content is 15 to 50 ppm; among non-metallic inclusions included therein, the number of inviscid inclusions is 1.