When to use hot rolled steel.
Difference between hot rolled and cold rolled sheet metal.
To know various materials used to manufacture sheet metal parts.
In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa.
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 sheets above re crystallization temperatures.
The various types mean that steel can by widely used in infrastructure appliances vehicles wind turbines and many more applications.
Hot rolled steel has rounded edges a rough surface texture and no grease on its finish.
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.
Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering.
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.
In hot rolled steel final rolling is done when the steel is hot.
Cold rolled steel is stored and sold in coiled form after rolling.
The billets are then heated eventually reaching over 1700 f.
Both cold rolled and hot rolled steel start out as large steel slabs or billets cast from hot liquid metal.
Thus the yield strength of cold rolled steel is higher than that of hot rolled steel.
As an example a hot rolled steel product may have a yield strength of 235 mpa.
In cold rolled steel final rolling is done when the steel is cooled to the room temperature.
The major d ifference between hot rolled and cold rolled steel is the way they are processed.
There are three main visual differences between the two processes.
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.
Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening.
The rolls induce plastic deformation.
Cold rolled is a normal temperature hot rolled is a high temperature.
It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created.
From the point of view of metal the boundary between cold rolling and hot rolling should be distinguished by recrystallization temperature.
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.
What is the difference between hot rolled and cold rolled steel.
