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.
Wire rod is a rolled steel product (alloy or non-alloy), manufactured from semi-finished steel with a rectangular, rounded, hexagonal or squared shape. Especially, fine cross-sections are reached by sequent cold drawing. Wire rod is wrapped around into the coils and also carried in this form.
Steel Wire Rod Hs Code: 7213 (Steel Wire Rod, Steel Wire Rod Coil)
Steel wire rods can be used for a wide range of products depending on how it is shaped and treated. The main usage is in the manufacturing of:
The steel wire rod is a finished product and is cold-formed for farther processing. Although it has a variety of shapes, it is mostly rolled round. Diameters often range from 5 to 15 millimeters, with most comply with the ISO standards, makes it easy for the sizes to advance in increments of 1 mm to 20 mm.
All steel wire rods are formed into the coils without any break. This is to ensure that steel wire rods are well-prepared for farther processing (usually by heat treating, coating, and cleaning). The coils’ internal diameter often varies from 810 to 910 millimeters, and the external, from 1100 to 1300 millimeters (depends on the capability of mill’s equipment). Subsequently, the weight of the coils differs from approximately 600 kg and larger above 2 tons.
According to the type of material, Steel wire rods are manufactured in different grades.
Carbon steel wire rod is the most common with no minimum content specified or required of molybdenum (Mo), aluminum (Al), chromium (Cr), niobium (Nb), cobalt (Co), nickel (Ni), tungsten (W), titanium (Ti), zirconium (Zr), vanadium (V), or any other element required for a particular effect of alloying. Carbon steel wire rods contain copper content, generally up to 0.40%. Moreover, the manganese content will not exceed the level of 1.65% and 0.60% will be the maximum level of silicon.
These steel wire rods are supplied in the following grades:
Besides the grades, there are other features to be guaranteed for carbon steel wire rods while going through the various processes to be with no defects as well as have the right performance according to the destined application.
The most common features are:
Other qualities are:
Source: http://www.tis-gdv.de & www.ispatguru.com
Order Related Products: