Galvanized Steel Sheet

ASTM A653 is easy to machine, form, and weld. This carbon flat roll grade is often fabricated into parts where high strength is not a requirement.  Kloeckner Metals supplies A653 hot dipped galvanized sheets among many other galvanized steel grades.

CS Type A is a commercial galvanized cold roll steel. It has a chemical composition including carbon, phosphorous, manganese, sulphur, and iron.

CS Type B is a commercial steel with a carbon, phosphorous, manganese, sulphur, and iron chemical makeup.

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.

Deep Drawing Steel is best for severe drawing applications.

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

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

Kloeckner Metals stocks hot dipped galvanized forming steel.

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

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.

Galvanized steel sheets are carbon steel sheets coated with a protective layer of zinc to improve corrosion resistance and extend service life. Most galvanized sheet metal is produced using the hot-dip galvanizing process, where the steel is immersed in molten zinc to create a durable, metallurgically bonded coating.

This zinc coating acts as both a physical barrier and a sacrificial layer, protecting the underlying steel from rust even when the surface is scratched or exposed to moisture. Because of this added protection, galvanized steel sheets are widely used in construction, HVAC systems, automotive components, agricultural equipment, and general fabrication.

Available in a variety of gauges, widths, and coating weights (such as G60 and G90), galvanized sheets offer a cost-effective solution for projects requiring strength, formability, and long-term corrosion resistance.

Galvanized steel sheets provide several advantages over untreated carbon steel and other coated materials.

Corrosion Resistance

The zinc coating protects steel from oxidation and environmental exposure, significantly reducing maintenance requirements in indoor and outdoor applications.

Long Service Life

Depending on the environment and coating weight, galvanized sheet metal can last decades before showing signs of corrosion. Heavier coatings such as G90 offer enhanced durability in more demanding conditions.

Cost-Effective Protection

Compared to alternative corrosion-resistant materials, galvanized steel sheets deliver reliable performance at a competitive price point. The protective coating reduces lifecycle costs by minimizing repairs and replacement.

Formability and Fabrication

Galvanized sheets maintain the strength and workability of carbon steel. They can be cut, bent, roll-formed, stamped, and welded, making them suitable for a wide range of industrial and structural applications.

Wide Availability

With multiple grades, coating weights, and surface finishes available, galvanized steel sheets can be specified to meet ASTM standards and project requirements across industries.

Galvanized steel sheets are commonly used in:

• Roofing and siding panels
• HVAC ductwork and ventilation systems
• Automotive body components
• Electrical enclosures and panels
• Agricultural buildings and equipment
• Structural framing and decking

Their combination of strength and corrosion protection makes them a preferred material in both commercial and industrial environments.

Heavier coating weights such as G115 and G235 provide increased zinc thickness for applications exposed to severe environmental conditions, including coastal, industrial, or high-moisture environments. Selecting the appropriate galvanized coating weight depends on expected service life, exposure conditions, and fabrication requirements.

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.

Galvanization refers to cold rolled steel that has been hot-dipped in a zinc bath. Galvanization is the process of exposing metal to a zinc bath.

Once removed from the bath, the steel, now coated with zinc, chemically reacts to oxygen in the air. This bonds the zinc to the steel and forms a protective, more corrosion-resistant product. Different thicknesses of this protective zinc coating can be achieved, and are included in the conventional naming system for galvanized metal products. The standard guideline equates a heavier coating with higher durability.

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.

Pre-painted or coil coated metal is produced by a highly automated process. The cold rolled and galvanized sheet metal is uncoiled at a prescribed rate to receive continuous application of: alkaline degreasing, cleaning, treatment, sealing, curing, and cooling. This process continues until a paper-thin coating of paint has adhered to the metal. Once the final layer has adhered and dried the metal can be further processed without risk of damaging the painted top coat. Prepainted metal is an alternative to post-painting metal. When compared to metal that has been painted on after, prepainting produces a higher integrity, more corrosion resistant top coat of nearly any color imaginable. Pre-painted steel or aluminum is very common for metal roofing, the automotive industry, and household appliances.

Yes, but it rusts much more slowly than uncoated steel. The zinc acts as a barrier to moisture and oxygen. If the coating wears down or is damaged, rust can develop over time.

Galvanized steel is regular steel coated with a thin layer of zinc to protect against rust. While zinc itself is not magnetic, the steel underneath is strongly magnetic, and the zinc coating is too thin to block this property. So overall, galvanized steel retains its magnetic properties and will attract magnets effectively.