Cold Rolled Vs Hot Rolled Sheet Metal

Hot rolled steel has a blue gray appearance and a rough feel once it completes the rolling process and will remain malleable and soft.

Cold rolled vs hot rolled sheet metal.

As it is easy to form metal in high temperatures without any extra delays it is possible to produce it in larger quantities than cold rolled steel. While at room temperature cold rolled steel is either annealed or drawn through rollers depending on what the manufacturer needs the metal to do. Hot rolled steel properties. It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created.

The difference between hot rolled and cold rolled steel is this recrystallization point. Hot rolled steel is malleable and perfect for industrial applications such as structural beams rail tracks and sheet metal. For example railway track automotive frames structural frames low accuracy sheet metal parts etc. The following are some of the key differences in hot rolled vs cold rolled steel.

Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening. Steel comes in many grades specifications shapes and finishes the world steel association lists over 3 500 different grades of steel each with unique properties. This keeps the market price of hot rolled steel lower. The billets are then heated eventually reaching over 1700 f.

Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature. Cold rolled has sharper corners and more precise dimensions. Cold finished bars are typically harder to work with than hot rolled due to the increased carbon content. Cold rolling is done when the metal is able to form new grains as the old ones are deformed by rolling and bending the metal.

Hot rolled steel vs. Whereas cold rolled steel sheets are used for precision and quality fabrication work for example consumer electronics and telecom products metal furniture automobile industry etc. All cold products provide a superior surface finish and are superior in tolerance concentricity and straightness when compared to hot rolled. Both cold rolled and hot rolled steel start out as large steel slabs or billets cast from hot liquid metal.

But then once it has cooled it undergoes further processing. However this cannot be said about cold rolled sheet and hot rolled sheet. Cold rolled steel is stored and sold in coiled form after rolling. Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish.

At this high temperature they are easily flattened into a long sheet using a set of rollers and then wound up into large coils. The steel cools. The various types mean that steel can by widely used in infrastructure appliances vehicles wind turbines and many more applications.