Marketing in Middle East Steel and Metals Market
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Galvanized wire (white), which is produced in thicknesses of 1.2 to 4 mm, in the production of fences, gabion net, chicken net, linear and annular barbed wire for fencing gardens and agriculture, as well as in the construction industry, formatting and packaging and hundreds of other items are used.
Rabitz wire is a 1.2 mm thick white wire, which is also called Rabitz wire because of its use for rabbits. This product is also divided in terms of material and production method:
- Type: Based on gender, they are divided into two categories, soft and hard. The amount of carbon in the wire determines the hardness and softness of the wire. The higher the carbon content, the harder the wire and the lower the carbon, the softer the wire.
- Production method: As mentioned before, it is produced in two forms of hot galvanizing and cold galvanizing, which is available in hot type in western Asia and Iran.
The wire scoop is a white wire 1.5 mm thick that is used to scoop the back of Granite rocks and is therefore known as wire scoop.
To buy this product, we must pay attention to the thickness of the wire and determine it according to our needs.
Cold rolled sheet
Cold rolling is the stage of operation after hot rolling of Steel sheet. However, before entering the cold rolling process, an acid washing step is performed and an oxide layer is removed from the surface of the sheet and then it is rolled and the thickness of the sheet is reduced.
Cold rolling of the sheet increases its strength and increases its resistance to weight ratio and enables the sheet to have a lower error rate and greater tolerance during the manufacturing and machining stages. In general, cold rolling is used for sanding, smoothing and processing the surface of hot rolled steel and polishing.
Processes used to optimize surface processing and sizing of cold rolled product sheets include, in particular, chemical or mechanical scaling, cold rolling or sanding, and polishing. This method also increases the hardness and strength of the sheet because it is applied at room temperature and below the temperature of recrystallization.
Hot rolled sheet
Hot rolled sheets are produced by rolling line rollers at high temperatures (usually above 926 ° C, which is higher than the recrystallization temperature of steel). Steels are produced in this method that are resistant to deformation by cold rolling and under tension and pressure, and only during the hot rolling process, they must be melted and deformed again.
By bringing the temperature of steel above the crystallization temperature, it can be easily shaped and transformed into different sizes. The important point at the temperature required for hot rolling is that the temperature should be spread evenly on the steel surface so that the roller and its thickness change can be done evenly.
Otherwise, the parts that have received more heat than other parts will be rolled sooner and the shape will not be uniform. Mostly hot rolling stops when the temperature reaches 50 to 100 ° C above the crystallization temperature.
During the hot rolling process, by moving the rollers on the molten metal, it increases its length and decreases its thickness. If it is to be given a very small thickness to the metal, the movement of the rollers does not push the metal forward, but moves back and forth on the metal to reduce its thickness, but the associated costs increase sharply.
Slowly Rolled steels in hot rolling conditions require more leveling, such as plating, or increasing the leveling process to the end of the rolling line to increase layering (volume) in coils with limited capacity. In general, hot rolling may leave imperfections on the surface, such as scales or dents that require sanding and finishing to become a smooth surface.
Hence the quality of hot rolled steel is lower than cold rolled steel. Hot rolled sheets have a non-shiny surface due to their surface contact with the air atmosphere, which is why they are also known as black sheets in the market. Saba Steel Complex, a producer of hot rolled sheets, is a subsidiary of Mobarakeh Steel Factory, which produces and supplies hot rolled sheets with a thickness of 1.5 to 12.5 mm and a width of 800 to 1560 mm.
Factory sheet or factory fabric sheet, has modified and tidy edges and has standard sizes that if the same sizes are done by the cutting machine in the iron market, the factory is not accurate enough and their size is slightly different.