Difference Between Hot Rolled And Cold Rolled Steel Coil

The steel plate is divided into wholesale hot rolled steel coil and high quality cold rolled steel coil china. The difference between the two is still very large. Let’s talk about this issue below.

Hot Rolled Steel Sheet

By definition, steel ingots or billets are difficult to deform at normal temperature and are difficult to process. Generally, they are heated to 1100 to 1250 ° C for rolling. This rolling process is called hot rolling. The wholesale hot rolled steel coil has a high temperature, so the deformation resistance is small, and a large amount of deformation can be achieved. Taking the rolling of the steel sheet as an example, the thickness of the continuous casting blank is about 230 mm, and after rough rolling and finish rolling, the final thickness is 1 to 20 mm. At the same time, due to the small width-to-thickness ratio of the steel plate, the dimensional accuracy requirement is relatively low, and the shape problem is not easy to occur, and the convexity is mainly controlled. For the requirements of the organization, it is generally achieved by controlled rolling and controlled cooling, that is, controlling the rolling temperature, finish rolling temperature and crimping temperature of the finishing rolling to control the microstructure and mechanical properties of the strip.

Production Process

Type use
1. Structural steel
Mainly used in the production of steel structural parts, bridges, ships and vehicles.
2. Weather resistant steel
Special elements (P, Cu, C, etc.) are added, which have good corrosion resistance and atmospheric corrosion resistance, are used in the production of containers and special vehicles, and are also used in building structures.
3. Steel for automobile structure
High-strength steel sheet with good stamping performance and welding performance for automotive FRAME, WHEEL and other production.
4. Wholesale hot rolled steel coil
Carbon steel, alloy steel and tool steel for general mechanical structures are used in the production of various mechanical parts after heat treatment.
5. Cold rolled original board
Used in the production of a variety of cold rolled products, including CR, GI, color coated panels.

6. Steel plate for steel pipe
It has good processing performance and compressive strength and is used to produce high pressure gas pressure vessels filled with LPG, acetylene gas and various gases below 500L.
7. Steel plate for high pressure vessels
It has good processing performance and compressive strength and is used to produce hih pressure gas pressure vessels filled with LPG, acetylene gas and various gases below 500L.
8. Stainless steel plate
Stainless steel has good corrosion resistance and is mainly used in the food industry, surgical equipment, aerospace, petroleum, chemical and other industries.

If you are interested in rolled hard roll steel coil factory price and high quality cold rolled steel coil china, China galvanized steel coil supplier welcome to inquiry for free.