It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created.
Hot rolled vs cold rolled sheet metal.
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.
Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening.
Hot rolled steel has a blue gray appearance and a rough feel once it completes the rolling process and will remain malleable and soft.
The following are some of the key differences in hot rolled vs cold rolled steel.
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.
The rolling of steel is mainly hot rolling and cold rolling is usually used only for the production of steel with precise sizes such as small sized section steel and thin plates.
The steel cools.
This keeps the market price of hot rolled steel lower.
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 and cold rolled are the process of steel plate or profile forming.
Hot rolled steel vs.
All cold products provide a superior surface finish and are superior in tolerance concentricity and straightness when compared to hot rolled.
Hot rolled steel is malleable and perfect for industrial applications such as structural beams rail tracks and sheet metal.
Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature.
Continuous rolling gives the desired final shape a metal sheet 3 mm and upwards or profile.
Both cold rolled and hot rolled steel start out as large steel slabs or billets cast from hot liquid metal.
The billets are then heated eventually reaching over 1700 f.
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.
They have a great influence on the structure and performance of steel.
Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish.
Hot rolled steel properties.
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.
Cold rolled steel is stored and sold in coiled form after rolling.
However this cannot be said about cold rolled sheet and hot rolled sheet.
For example railway track automotive frames structural frames low accuracy sheet metal parts etc.
Hot rolled steel sheets are used in fabrication work where aesthetics and quality are not very important.
Cold finished bars are typically harder to work with than hot rolled due to the increased carbon content.
