Hot Vs Cold Rolled Sheet Metal

Both cold rolled and hot rolled steel start out as large steel slabs or billets cast from hot liquid metal.

Hot vs cold rolled sheet metal.

For sheet metal manufacturers spin the rolled steel into coils and leave it to cool. However this cannot be said about cold rolled sheet and hot rolled sheet. To know various materials used to manufacture sheet metal parts. Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering.

The various types mean that steel can by widely used in infrastructure appliances vehicles wind turbines and many more applications. This keeps the market price of hot rolled steel lower. Steel shrinks slightly as it. For other forms such as bars and plates materials are sectioned and packaged.

All cold products provide a superior surface finish and are superior in tolerance concentricity and straightness when compared to hot rolled. Continuous rolling gives the desired final shape a metal sheet 3 mm and upwards or profile. But then once it has cooled it undergoes further processing. Cold rolled steel is stored and sold in coiled form after rolling.

The major d ifference between hot rolled and cold rolled steel is the way they are processed. 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. The billets are then heated eventually reaching over 1700 f. 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 properties. It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created. Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening.

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 is malleable and perfect for industrial applications such as structural beams rail tracks and sheet metal. Hot rolled steel involves rolling the steel sheets above re crystallization temperatures. The steel cools.

The difference between hot rolled and cold rolled steel is this recrystallization point. 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 roll is initially hot roll material.