Wire rod is hot rolled plain bar/rods (i.e. without indentation) in Coil Form. It is manufactured by hot rolling billets on continuous rolling mills normally used to produce Steel Wires and at times Steel Bright Bars.
Wire rod is mainly produced at continuous wire rod hot-rolling mills. Squares with a cross section from 100×100 mm to 200×200 mm and a length of 6-12 m (concast squares produced at continuous casting machines, as well as hot-rolled squares produced at blooming mills or heavy section mills) are used as feedstock.
Prior to rolling, steel billets are subject to heating in reheating furnaces with walking hearth, walking beams or the combined reheating systems under conditions that help to achieve minimum scaling and decarburisation of metal. At the exit of the reheating furnace, billets are subject to hydraulic descaling to remove scale from their surface.
A wire rod mill is usually a single-strand or two-strand facility consisting of a roughing train, intermediate continuous train, finishing train and cooling lines, as well as bundling, handling and finishing end. The number of mill stands in operation depends on the cross section of the billet and the final size.
The finished product section is achieved by subsequent reduction of the billet as it passes the stands complete with rolls of different gauges. The wire rod structure and properties after hot working are achieved in line at the two-stage controlled cooling units. Steel wire rod is water cooled in the first stage and air cooled in the second stage. The wire rod cooling parameters can change within a wide range depending on application, steel grades, dimensions, etc.
The rolled and cooled wire rod is then fed to a laying head (pipe) for coiling or bundling. Wire rod coils are grabbed by the chain conveyor hook and conveyed to the inspection area, where they are inspected, defected ends are removed and test samples are taken. The finished wire rod coil is repressed and bound by wire rod or strapping bands.
- SAE 1006
- SAE 1008
- SAE 1010
- SAE 1012
- SAE 1013
- SAE 1015
- SAE 1018
- SAE 1019
- SAE 1020
- SAE 1023