General Info About Galvanized Steel

Galvanized steels undergo the process of galvanization. This consists of exposing cold rolled steel to a zinc bath. As a result, galvanized steel’s zinc-coating protects against corrosion. Applications with galvanized steel span many industries from architectural to the solar industry.

Species of Galvanized Steel Coil

· CS-A

Drawing Steel showcases advanced ability to be drawn. DS is characterized by less than .05% carbon. This results in a very soft metal that can be easily bent and shaped in the manufacturing process. It is suitable for applications requiring superior drawing capabilities.

· DDS

Deep Drawing Steel is best for severe drawing applications.

· EDDS

Extra Deep Drawing Steel offers the highest formability and the lowest strength reserved for deep drawing applications.

· 33-55

Kloeckner Metals supplies 33-55 in galvanized and galvannealed formats.

· FS-A

Kloeckner Metals stocks hot dipped galvanized Forming Steel.

· G90, G115, G65, G235

These hot dip galvanized steel grades are intended for applications requiring corrosion resistance and moderate bending and forming capabilities. G90 is growing in popularity in the solar industry.

· Prepainted

Prepainted steel is popular across industries for widespread applications including roofs, doorways, and interior, insulation, automotive, and solar reflective paneling. With nearly an unlimited number of color and texture options prepainted steel provides superior adhesion and more reliable surface consistency that can be cut, bent, and generally worked without damaging the finished coating. Kloeckner Metals supplies prepainted steel in hot rolled dry, HRPO, cold rolled, galvanized, galvannealed, and galvalume formats.

Application of galvanized steel coil

Galvanized steel coil, a thin steel plate is dipped into a melted zinc tank so that the surface is adhered to a zinc sheet. At present, continuous galvanizing process is mainly used to produce, that is, continuous immersion of rolled steel plate in the melting of zinc in the plating tank to make galvanized steel plate; Alloyed galvanized steel plate. This steel plate is also made by hot dipping, but immediately after it is out of the groove, it is heated to about 500℃ to create an alloy coating of zinc and iron. This galvanized steel coil has good coating tightness and weldability.

Galvanized steel coil products are mainly used in construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries. The construction industry is mainly used for the manufacture of anti-corrosion industrial and civil building roof panels, roof grids, etc. The light industry uses it to manufacture household appliance shell, civil chimney, kitchen utensils, etc., and the automobile industry is mainly used to manufacture corrosion resistant parts of cars. Agriculture, animal husbandry and fishery are mainly used as food storage and transportation, meat and aquatic products frozen processing equipment; Commercial mainly used as material storage and transportation, packaging tools, etc.

What is cold rolled?

Cold rolled steel involves passing room temperature steel through high pressure rollers. This allows for greater control and consistency to achieve smooth surface quality and even thickness throughout. However, the processing for cold rolled steel tends to be more extensive when compared to hot rolling steel. The main benefits for cold rolling steel are more refined surface character and improved durability.

What is the difference between galvanized and galvannealed?

These two product treatments are similar.

· Galvannealing goes a step further than galvanizing steel. In fact, in order to galvanneal steel, it must first be galvanized. After the steel has been placed in a zinc bath, it gets annealed. Annealing is a heat treatment process. In this case, it adds a zinc-iron alloy protective coating to the steel.

· One of the main differences between theses two treatments is the surface finishing character. Galvannealed steel has the addition of iron which hardens the surface, gives it a matte aesthetic, and makes it more scratch resistant than galvanized steel. Another main difference is that galvannealed steel can be easily painted after the fabrication process, whereas galvanized steel cannot.