Characteristics of Steel Wire Rods...

Characteristics of Steel Wire Rods Wire rod is a hot rolled intermediate steel product produced from a semi normally a billet and having a circular, rectangular or other cross-section that is typically produced in nominal diameters of 5 mm to 20 mm in irregularly wound coils, primarily for subsequent drawing and finishing by wire drawing units. The range of materials in which wire rods are produced, comprises low to high carbon steels, cold heading steels, wire drawing steels, alloy steels, spring steels, ball bearing steels, electrode quality steels, reinforcement bars, tool steels and stainless steels. Wire rods are categorized by the ‘quality’ according to end use. Industrial quality wire rods which are made from low carbon or mild steels, account for majority of wire rods production and consumption. These wire rods are primarily intended for drawing into industrial quality wire which, in turn, used for the manufacture of such products as garment hangers, wire mesh, barbed wire, nails, and fencing etc. Wire rods are produced in wire rod mills to meet needs for specific applications and quality requirements of the customers. The desired metallurgical properties are imparted by adjusting the chemistry during steelmaking as well as by rolling and cooling practices. The wire rod rolling process determines the rod’s size (diameter) and dimensional precision, depth of decarburization, surface defects and seams, amount of mill scale, structural grain size, and within limits set by the chemistry, tensile strength and other physical properties. Standards of product quality (e.g. tighter dimensional tolerances, control over residuals, and coil weight) have become tighter in recent times along the entire range of wire rods, largely in response to customer demands for improved performance on the customer’s equipment. The quality, end-uses and important characteristics of wire rods are given in Tab...