Coiled galvanized steel with a polymer coating: characteristics, purpose

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

Construction and industrial enterprises often use rolled metal in various forms in their work. In the list of the most demanded products, rolled steel occupies not the last place. Manufacturers offer a wide range of this type of rolled metal.

How do they differ, and how to choose the right steel for a certain type of work?

What is this

First of all, you should define the term, and only then go on to consider the main characteristics and advantages of the product.

Coiled steel is thin metal sheets supplied in rolls. The sheet width varies from 200 to 6000 mm. There are certain requirements for the maximum weight of one roll. The mass of a cold-rolled steel coil can reach 15 tons, for hot-rolled steel this figure is much less - only 10 tons.

Rolled metal products are produced in a wide range, however, for convenience, all positions presented on the goods market are classified according to 3 main characteristics.

• Surface condition divides the entire range into black (non-pickled) coiled steel and pickled.
• Accuracyrolling can be normal and high precision.
• Edge type characterizes steel as uncut and cut.

Hot-rolled and cold-rolled

These two types of steel differ in the type of production.

Hot-rolled is subjected to rolling while still hot. Its distinguishing features are a sheet thickness of 10-15 mm, an average surface smoothness and a relatively low wear resistance threshold. However, this does not mean that such material will not find application. It is widely used in the manufacture of various types of profile pipes.

Cold-rolled steel coils have some differences from the previous version. It is the same hot-rolled metal, but with additional processing. This is what allows it to contain a reduced amount of carbon. Features in manufacturing technology give cold-rolled steel and some operational features:

• minimum thickness reaches 0.45mm;
• sheet surface becomes perfectly smooth;
• great for welding.

Advantages of coiled steel

In addition to rolled metal, manufacturers offer sheet metal. Considering the similarities and differences of these positions, one can notice the undeniable advantages of the material in a roll.

• Ease of storage. Roll media is compactly packaged and requires minimal storage space.
• Easy to load, unload and transport.
• Seamless execution of parts of different widths.

Galvanized steel

Galvanized coiled steel is the type of rolled metal that is coated on both sides with a layer of zinc during the production process. This feature reduces the risk of corrosion and makes the service life of the steel long. Zinc coating is carried out using 2 different technologies:

• galvanic method;
• hot method - this option is more economical, so the finished product will also be more attractive in price.

The quality of the finished galvanized rolled metal must fully comply with the norms and standards. They are spelled out in GOST 14918-80.

Polymer coating

Pre-painted rolled steel has become an alternative to galvanized products. The basis of this type of rolled metal is galvanized steel in a coil, however, this option is considered to be improved due to an additional layer of polymer. The coating varies significantly in composition, so you need to choose it taking into account the requirements for the finished product.

Polyester. This option guarantees resistance to rust and sudden changes in temperature, but it turns out to be powerless under mechanical stress and collapses.

Polyvinyl chloride (PVC). Products made from such steel are distinguished by anti-corrosion properties, resistance to mechanical stress, however, UV rays and temperature changes are detrimental to them.

Paint and epoxy. Depending on the grade of galvanized coils, such a coating can be applied to oneside or both. The main advantage of a paint or epoxy coating is high corrosion resistance and a fairly low price. Polyurethane. By purchasing rolled metal with such a coating, you can achieve a long service life and reliability, because the polyurethane layer protects the steel from corrosion, ultraviolet radiation, high and low temperatures and mechanical stress. The cost of such a purchase will be an order of magnitude higher than the price of coiled steel with other types of protective layer.

Application areas

Zinc-coated rolled steel is widely used in industries. This was made possible due to high wear resistance, aesthetic appearance (especially for polymer-coated steel), ease of installation and affordable prices.

• Roofing material. For roofing, rolled steel is considered one of the best materials. It is not afraid of contact with moisture, can serve for decades and is relatively inexpensive. In addition, the smooth surface prevents snow from accumulating on the roof surface. It is from this type of rolled metal that metal tiles are produced.



• Facing. Strength, ease of processing and installation, affordability, attractive appearance - all these are just a few of the advantages of rolled steel for building cladding. It is present in the production of sandwich panels, metal siding.
• Production of finished metal products. Galvanized coils are considered to be a suitable raw material for the production ofmany other products, including household and industrial appliances.



• Design of engineering networks. Air ducts, ventilation and drainage systems are often prepared from thin metal sheets.
• In other words, many industrial enterprises use coiled steel, while choosing a product with suitable characteristics.

In other words, rolled steel is a type of rolled metal product that has many outstanding characteristics. Thanks to this, he found application in construction, industrial and many other fields.