Steel is a common material used in various kinds of industries all over the world. Aside from its structural durability and lifespan, steel is also flexible. Because it is a widely used product, steel comes in different form, shapes, sizes, and strength. The grades of steel differ depending on its composition.
However, it is important to note that there are two methods on how manufacturers form rolled steel. Steel rolls that for sale come in hot and cold variants. Knowing the difference is important to determine proper usage.
Hot rolled steel
As the name suggests, they make and form hot rolled steel using very high temperature. This makes it easier to form and mold steel to its desired shape. The process starts by using a rectangular metal called billet. They then flatten the billet into a large roll and is kept at a high temperature.
It is run through a series of rollers to achieve the end product. Different finishes follow different procedures. They coil sheet metals and allow them to naturally cool. White-hot strands of steel are passed through high-speed rollers to obtain the product.
Because hot-rolled steel naturally cools down, there is a tendency for the steel to shrink. Thus, people use hot rolled steel in projects that do not require precision and consistency in shape and size.
Cold rolled steel
Cold rolled steel initially undergo the same processes as of hot-rolled ones. The only difference is that after it cools down at room temperature, they take it in for further processing such as turning, grinding, and polishing. This gives cold rolled steel sheets a more precise and refined finishing.
Cold rolled steel is more expensive than hot-rolled ones because of the additional processes it undergoes. However, it is a popular choice for technically precise applications or in instances where aesthetics are of prime importance.
Cold rolled steel is also stronger than hot rolled ones because of the hardening process that it undergoes.
Now that you know the basic differences between the two, choosing which type of steel to use for your next project will definitely be easier.