Difference Between Hot Rolled And Cold Rolled Sheet Metal

Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering.

Difference between hot rolled and cold rolled sheet metal.

Cold rolled steel is stored and sold in coiled form after rolling. Cold rolled is a normal temperature hot rolled is a high temperature. From the point of view of metal the boundary between cold rolling and hot rolling should be distinguished by recrystallization temperature. Hot rolled steel involves rolling the steel sheets above re crystallization temperatures.

It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created. Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. 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. Simply put rolling is a metal fabrication process that involves the formation of molten metals or other kinds of materials into products such as sheets wires bars and the like.

The various types mean that steel can by widely used in infrastructure appliances vehicles wind turbines and many more applications. Both cold rolled and hot rolled steel start out as large steel slabs or billets cast from hot liquid metal. Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening. When to use hot rolled steel.

The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill and not the product specification or grade. To know various materials used to manufacture sheet metal parts. The debate between hot rolled vs cold rolled steel persists to determine which process is the more desirable. The difference between cold rolling and hot rolling are mainly the temperature of the rolling process.

At this high temperature they are easily flattened into a long sheet using a set of rollers and then wound up into large coils. Hot rolled steel involves rolling the steel at high temperatures where cold rolled steel is processed further in cold reduction mills where the material is cooled followed by. There are three main visual differences between the two processes. The rolls induce plastic deformation.

In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa. Hot rolled steel has rounded edges a rough surface texture and no grease on its finish. In cold rolled steel final rolling is done when the steel is cooled to the room temperature. Alternatively cold rolled steel has sharp edges a very smooth surface texture and an oily or greasy feel to it.

What is the difference between hot rolled and cold rolled steel. In hot rolled steel final rolling is done when the steel is hot. The billets are then heated eventually reaching over 1700 f.