Cold Rolled Sheet

Cold rolled sheet refers to a type of sheet metal produced by the cold rolling process. It is a work hardening process used to change the structure of metals, where the metal is compressed and squeezed, increasing the metal’s yield strength and hardness. Cold rolled steel, sometimes abbreviated to CRS, is a well-known, extremely ductile material that is well-suited for applications that require precision. Wanzhi Steel has several precision rolling machines and advanced technology. We can produce all sizes of cold rolled plates with thicknesses of 0.12-6.0mm and widths of 600-1500mm and have the processing services described in the table below, which can be shipped directly to your destination.

Cold Rolled Sheet Specification

Item	Cold roll sheet
Thickness	0.11-6.0mm
Surface Treatment	Chromated and oiled, and ant-finger
Hardness	Softy, half hard, hard quality
Technology	Cold Rolled
Grade	Q195,Q215,Q235,08AL,SPCC,SPCD,SPCE,SPCEN,ST12,ST13,ST14,ST15,ST16,DC01, DC03,DC04,DC05,DC06
Width	600-1500mm
Length	As your requirements
Processing Service	Welding, Punching, Cutting, Bending, Decoiling
Delivery time	15-35 days after the confirmed order

What is cold roll sheet?

Cold rolled steel is a steel plate made by further processing metal plates or hot rolled steel at room temperature. Its surface is smoother and its dimensional accuracy is higher than that of hot rolled steel. Cold rolling is rolling at recrystallization temperature, but it is generally understood as rolling using room temperature rolled materials.

Cold Rolled Sheet Production Steps

Its process mainly includes hot rolling stage, cold rolling stage, and surface treatment stage. The simple process is as follows:

Steel plate cutting → heating (usually close to or above the Ar3 phase transition point of steel) → hot rolling → steel plate rapidly cooled to below 650℃ → pickling → cold rolling → annealing (temperature is usually above 600℃ and below the Ac1 phase transition point) → surface treatment → coating (applying anti-rust oil, paint, or other coatings)

Rolling Mills

Why is it called cold rolled steel?

Mainly because the production of cold-rolled steel sheets is carried out at room temperature or below the recrystallization temperature. In layman’s terms, cold rolling is a process that strengthens steel by changing its shape without using heat. The cooled hot-rolled steel passes through a series of rollers to gradually thin the sheet, using mechanical stress instead of heat to change the structure of the metal. Strain hardening can increase the strength of the metal by up to 20% and improve the surface finish of the metal.

Compared with hot-rolled steel made at high temperatures, it is carried out at room temperature, so it is called cold-rolled steel.

Why is cold rolled steel more expensive?

Cold rolled steel is made by first going through a hot rolling stage, then rapidly cooling it to below 650°C, then passing through a set of precision rolling mills, passing the rollers back and forth several times, and sometimes annealing during the cold rolling process to reduce its internal stress and increase its ductility. Hot rolled steel does not require these steps, so cold rolled steel is more expensive due to these steps.

Benifits

1. Good surface quality

Since it is rolled at room temperature and no iron oxide scale is produced, the surface quality of cold-rolled sheet is good and smooth. It has a mirror or matte effect according to requirements. The smooth surface is conducive to applications such as electrical appliance production,

2. High dimensional accuracy

The steel plate after cold rolling has high dimensional accuracy and good thickness consistency. It is much more accurate than hot-rolled plates, and the thickness tolerance can be as low as ±0.01mm, and even more accurate in some advanced applications. This accuracy makes them suitable for applications that require strict tolerances, such as manufacturing precision mechanical parts and automotive parts.

3. Superior mechanical properties

Cold rolling increases the strength and hardness of steel plates. Because the metal grains are refined and elongated during processing, the mechanical properties are improved. Both the yield strength and tensile strength and process performance are better than hot-rolled thin steel plates, with higher strength and hardness and reduced ductility.

Applications

Automotive Industry

Used in body panels, fuel tanks, wheels, chassis components and interior trim. The smooth surface and enhanced mechanical properties contribute to the structural integrity and aesthetics of the vehicle.

Electrical Appliances

Cold-rolled steel sheets used in appliances such as refrigerators, washing machines, electric motors, microwave ovens and air conditioners. The smooth surface provides an excellent basis for painting and labeling, and the precise dimensions facilitate accurate fit of parts.

Architecture and Decoration

In architecture, cold-rolled sheets can be used for roofing, cladding and interior decoration. They can be made into a variety of shapes and profiles to meet different architectural and design requirements. For example, cold-rolled stainless steel sheets are often used for decorative purposes in high-end buildings due to their beauty and corrosion resistance.

Precision Instruments

Precision parts such as gears, bearings and shafts are essential for electronic products.

Transformers, Generators and Power Equipment

In particular, cold-rolled silicon steel sheets are used in the core part of transformers, and are suitable for high-power power transformers and motors due to their good magnetic properties and low iron loss.

Cold rolled plate VS hot rolled plate

Since cold-rolled sheet is processed on the basis of hot-rolled sheet, its various performances are better than those of hot-rolled sheet, as listed below:

1. Surface quality: The surface of a hot-rolled sheet is relatively rough, while the surface of cold-rolled sheet is smoother and cleaner, without scale and surface defects.

2. Dimensional accuracy: As mentioned above, the thickness tolerance of a cold-rolled sheet can be as low as ±0.01mm, so the dimensional accuracy of cold-rolled sheet is higher and the thickness consistency is better, which is an upgraded version of a hot-rolled sheet.

3. Mechanical properties: The strength and hardness of cold-rolled sheets are higher, which is suitable for products with precision and high strength requirements.

4. However, hot-rolled sheets also have unique application scenarios, such as construction steel, bridges, shipbuilding, etc., which require large-size and high-strength structural parts.

5. Price: The price of the cold-rolled sheet is higher than that of the hot-rolled sheet.

Cold rolled steel Factory Price- Wanzhi Steel

As you can see, cold rolled steel can be used for many purposes and in a variety of industries. Forced cooling is usually used to keep the metal temperature below the recrystallization temperature, which improves the physical and surface properties. Wanzhi Steel Free Factory, with a monthly output of 1,500 tons, specializes in the production of cold rolled and hot rolled steel, as well as in processing steel such as galvalume steel, galvanized steel sheet, ppgi steel, we provide all processing services and surface treatment, over the years, the products have been sold all over the world, used in various projects such as hospitals, power plants, nuclear power plants, landfills, schools, etc. If you are interested in cold rolled steel, or have other questions, do not hesitate to contact us, we are always ready to answer you.