What Is The Difference Between Cold Rolled Steel Coil And Galvanized Steel Coil?

All steel plate and steel pipe products contain 2 basic elements - carbon and iron - and there may be some compositional differences and various manufacturing processes. In the case of hot-dip galvanized steel coils and cold-rolled steel coils, they are similar steel products with unique properties and applications.

Galvanized steel is often referred to as hot-dip galvanized steel, and as the name suggests, galvanized steel is produced by dipping a steel product in molten zinc, with the zinc layer then oxidizing rapidly in the open air. Compared to iron, zinc is less reactive in redox processes, which is why it is so popular because the zinc layer protects the steel in our lives.

Cold rolling and hot rolling processes are two methods of making steel. Cold-rolled products have high product dimensional accuracy and are suitable for applications with high dimensional requirements. Cold rolling occurs below the crystallization temperature and is controlled by different types of rolls. The basic products are cold-rolled sheets and coils, which can also be formed into other shapes such as cylinders, I-beams and tubes.

Can cold rolled steel products be galvanized? The answer is yes, they are two different processes used for different purposes, one for forming and the other for corrosion protection. The only limitation of galvanized steel is that it cannot be used in high temperature conditions, and if the surface is scratched, the zinc layer will lose its protection when scratched.

Galvanized steel products can be made from cold rolled and hot rolled steel. Generally speaking, hot-rolled steel has better yield strength than cold-rolled steel because the cold-rolling process destroys the grain structure of the steel, while hot-rolling improves it. Cold rolled steel has better surface conditions than hot rolled steel. Customers should choose the appropriate steel for your different applications.

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