Differences Of Hot Rolled Steel And Cold Rold Steel

1. Carbon Content

The carbon content of hot-rolled steel can be slightly higher than that of cold-rolled steel. The density is the same when there are little differences in the components.

2.Density

The density and composition of hot rolled steel can be checked through looking for various steel to find the specific one. Cold rolled steel has high hardness and relatively has difficult for processing, but it is not easy to deform and has high strength.

3. Production Process

The production process of hot-rolled steel and cold-rolled steel is different. Hot rolling steel is rolled at high temperature and cold rolling steel is processed from hot rolled steel at normal temperature. Generally speaking, cold rolled steel has better strength and hot rolled steel has better ductility.

What Are The Differences Between Hot Rolled Steel And Cold Rolled Steel

1.The Surface

The cold steel plate is cold rolled and the surface has no oxide scale with good quality. The hot steel plate uses hot rolled processing technique with oxide scale on the surface.

2. Toughness & Stretchability

Hot rolled steel has poor toughness and the price is low, while cold rolled steel has good stretchability and toughness, but the price is more expensive

3.Mechanical Properties

The cold rolled steel has much better mechanical properties than hot rolled steel.

4. Formability

Since the surface of cold rolled steel is better than hot rolled one, the forming effect also better than that of hot rolled steel.

5. Torsion resistance

Hot rolled steel has higher free torsional stiffness than cold-rolled steel, so the torsional properties of hot-rolled steel are better.

6. Smoothness

The smoothness of cold rolled steel sheet is better than that of hot rolled sheet.

Overall, cold rolled steel has better performance than hot rolled steel, but cold rolling process will cost more and the cold rolled steel has higher price than that of hot rolled one. People should choose the suitable one according to their needs. No matter what types of the rolling is, the mill rolling process plays an important role in steel making and mill roll is essential for the perfect dimensions.

Maybe different people have different views on hot rolled steel and cold rolled steel. Hope the simplified explanation will help people learn more about the two types of steel or steel plate.