We supply our high-quality hot roll steel coils and cold roll steel coils and coated steel coils to exact customer specification, in a wide variety of grades and thicknesses. Our steel coil suppliers are foreign and domestic steel mills, many of whom are ISO certified.
Con-Tech is constantly searching the marketplace for new steel sources. Global steelmaking capacity has increased in recent years. Asia and the Middle East are leading the way but, Bolivia, Namibia and Mozambique are also expected to see the start-up of their first steel plants.
Galvanized steel in particular is among the most popular steel types because of its extended durability, strength, formability and corrosion resistance.
Hot-rolled steel is best used for structural components and other applications where precise shapes and tolerances are unnecessary.
Cold rolled steel, in turn, is significantly stronger than hot rolled steel with an improved surface finish, allows for tighter tolerances and different thickness reducing options.
Frequently Asked Questions About Steel Coils
What Is Cold Rolled Steel?
Cold rolled steel is thinner, smoother and stronger than hot rolled products. Cold rolled steel is distinctive due to its aesthetic appearance, having well defined corners, more uniformity, and a smooth surface. Since the process is performed at room temperature, the steel will not shrink as it cools, as it does in the hot rolled process. Given its many advantages, there are innumerable uses of cold rolled steel including industrial packaging, furniture, parts, and other containers to name a few.
What Are Coated Steel Coils?
Coated steel coils or pre-painted metal are finished steel products that are wound or coiled after rolling. Then the coating material is applied on rolled metal strips in a continuous process which includes cleaning, if necessary, and chemical pre-treatment of the surface on one or both sides, followed by application of coatings, curing and/or laminating.
What Is Galvalume?
Galvalume is a coating consisting of zinc, aluminum, and silicon that is used to protect metal from oxidation.
What Is Hot Dipped Galvanized Steel?
Hot dipped galvanized steel is made when cleaned and rinsed raw steel is placed into molten zinc at a high heat which bonds the zinc into a thick dull coating over the steel. Hot dipped galvanized steel is used when durability and longevity are sought while electrogalvanized steel for items not expected to withstand the tests of time. Rust prevention in galvanized steel will depend both upon the nature of the zinc coating and environmental humidity. Hot dipped galvanized steel can be two to three times the cost of electrogalvanized steel as it will be more long lasting.
What Is Galvennealed Steel?
Galvennealed steel is steel processed by galvanizing followed by annealing. This makes galvennealed steel easier to paint and harder and more brittle than galvanized steel.
What Are Spiral Ducts?
Spiral ducts are specialized metal housings employed for HVAC airflow. Galvanized steel is used for many applications in the HVAC manufacturing process for the fabrication of spiral ducts used for HVAC airflow housings.