Hot-rolled and cold-rolled steel are two of the most common types of steel that are used in construction and manufacturing, with the differences in the production process affecting their properties and applications. When it comes to the steel that you use in your building or construction project, the choice between hot-rolled and cold-rolled steel can have a significant outcome on potential applications and uses. In this post, we take a closer look at the key differences between hot-rolled and cold-rolled steel, as well as their properties, to help you make a more well-informed decision in your own building or construction project.
Understanding Hot Rolled Steel
The hot rolling process involves heating steel to a very high temperature before passing it through a roller to achieve the desired shape and dimensions. The high temperatures cause the steel to become malleable, enabling it to be formed into specific shapes, such as parallel flange channels (PFCs). After being shaped, the steel is left to cool naturally. While this can lead to slight variations in size and a rougher surface due to oxidation, steel that is produced in such a manner is still strong and highly suitable for heavy-duty applications.
Understanding Cold Rolled Steel
On the other hand, cold rolling involves further processing of the steel at room temperature after it has been hot rolled. This can involve further rolling, pressing or drawing the steel to further refine it and enhance its dimensional accuracy as well as its surface finish. Because these additional processes do not involve high heat, the steel becomes harder and more resistant to deformation. However, this can also lead to higher costs due to the additional processing involved.
Choosing Between Hot Rolled and Cold Rolled Steel
Ultimately, the choice between hot-rolled and cold-rolled steel often boils down to a few key factors, including:
Dimensional Accuracy
If you are planning to use steel for an application that requires high levels of precision in sizing and dimensions, cold-rolled steel might be the better option. Hot-rolled steel may not have the same degree of dimensional accuracy and may lead to potential issues for your project.
Surface Finish
If the surface finish is not important, such as in structural uses where the steel will eventually be hidden from plain view, then hot-rolled steel might be a better fit. This is because hot-rolled steel still provides significant strength and durability despite the typically rougher surface finish than cold-rolled steel.
Get Your Steel from RW Steel
RW Steel is the number one supplier of steel and steel products in Melbourne. We have an extensive catalogue of steel sections that you can choose from, including hot-rolled steel PFCs, galvanised steel posts and retaining wall steel. Get a free quote on our website or contact us today to find out more about how we can help with your next building or construction project.