Introduction
Cold Rolled Steel is widely used in industrial chains, and many countries have made various regulations and standards for the production of cold rolled steel. The purpose of this paper is to analyze and discuss the properties, production process and application of Cold Rolled Steel under the standard of GB/T13700-1992.
Cold Rolled Steel GB/T 13700-1992
1. Definition of Cold Rolled Steel
GB/T 13700-1992 defines Cold Rolled Steel as the steel with a thickness of 0.25mm to 3mm and a width of less than 600mm that has been cold-rolled, pickled and annealed.
2. Chemical Composition of Cold Rolled Steel
The chemical composition of cold rolled steel must meet the requirements of GB/T 13700-1992. The main components are: C: 0.06-0.20, Si: 0.17-0.37, Mn: 0.35-0.80, P: 0.035 max, S: 0.035 max, Cr: 0.30 max.
3. Production Process of Cold Rolled Steel
The cold rolling process consists of several steps, including pickling, cold rolling, annealing and coiling.
Firstly, the hot-rolled strip is pickled in an acid bath to remove surface contaminants. The strip is then passed through sets of rolls to reduce its thickness, producing cold-rolled strip. This cold-rolled strip is then fed through annealing ovens to soften the material, before being coiled for storage.
4. Properties of Cold Rolled Steel
Cold-rolled steel has many advantages due to its improved mechanical properties. The tensile strength and yield strength of cold-rolled steel are higher than that of hot-rolled steel, and its yield strength increases with further cold rolling. Cold-rolled steel also has improved surface quality, a better tolerance for concentric and eccentricity, higher ductility and increased strength-to-weight ratio.
5. Application of Cold Rolled Steel
Cold-rolled steel has many applications in industrial chains. It is widely used in the automotive, oil and gas, mining, construction, and agricultural industries. It is also used in the aerospace industry for hull and vehicle components, as well as in the power generation industry for turbines and generators. Cold-rolled steel is also used in the steel processing industry for sheet metal, sheet forming and other operations.
Conclusion
GB/T 13700-1992 defines Cold Rolled Steel as the steel with a thickness of 0.25mm to 3mm and a width of less than 600mm that has been cold-rolled, pickled and annealed. The chemical composition of cold rolled steel should meet the requirements of GB/T 13700-1992. The production process of cold rolled steel consists of the steps of pickling, cold rolling, annealing and coiling. Cold-rolled steel has many advantages due to its improved mechanical properties. It is widely used in many industrial chains due to its properties. This paper analyze and discuss the properties, production process and application of Cold Rolled Steel under the standard of GB/T13700-1992.
