How to Choose Cold Rolled Flat Steel, Cold Drawn Flat Steel And Hot Rolled Flat Steel
Cold rolled flat steel, cold drawn flat steel and hot rolled flat steel are common metal flat steel materials, the difference between them is mainly reflected in the production process, performance characteristics and application areas.
Production process
Cold Rolled Flat Steel: Flat steel is produced by cold rolling hot rolled sheets at room temperature in a cold rolling mill, which reduces the thickness of the sheets and improves the surface quality.
Cold-drawn flat steel: is through the square or round steel at room temperature through the drawing process into a flat steel process, the process does not produce heat, so maintain a high degree of dimensional accuracy and surface finish.
Hot rolled flat steel: billets are heated at high temperatures, and then rolled into flat steel process, the process requires high temperatures, so the forming speed is fast, but the surface quality is worse than the cold process.
Performance Characteristics
Cold rolled flat steel: high surface finish and dimensional accuracy, dense internal organisation, excellent mechanical properties and processing performance.
Cold-drawn flat steel: also has high dimensional accuracy and surface finish, but its internal organisation may be more uniform and stable than that of cold-rolled flat steel.
Hot rolled flat steel: has high strength and plasticity, but the surface roughness is relatively high, usually need to be followed by surface treatment.
Comparison of surface finish: cold rolled flat steel>cold drawn flat steel>hot rolled flat steel
Comparison of mechanical properties from the hardness: cold rolled flat steel> cold drawn flat steel> hot rolled flat steel
Comparison of precision from the tolerance dimensions: cold drawn flat steel > cold rolled flat steel > hot rolled flat steel
Field of application
Cold rolled flat steel and cold drawn flat steel: suitable for applications requiring high precision and surface quality, such as precision machinery manufacturing, automotive parts, bearings, etc.
Hot rolled flat steel: suitable for building structures, bridges, steel structures and other fields, as well as for the higher requirements of strength and wear resistance.
In general, cold-rolled flat steel and cold-drawn flat steel in the precision and surface quality is better than hot-rolled flat steel, but the cost is also relatively high, so in the choice of materials need to consider the specific requirements of the use and economic factors.
The final choice of cold rolled flat steel, cold drawn flat steel or hot rolled flat steel is also based on the following factors.
Application Scenario: Choose the material according to the environment and scenario of its use. For example, for mechanical parts, precision equipment and other occasions that require high precision and surface quality, cold-rolled flat steel or cold-drawn flat steel is more suitable; for building structures, steel structures and other occasions that require high strength, you can consider choosing hot-rolled flat steel.
Economic considerations: Taking into account the differences in production processes, costs and prices of different materials, economic considerations need to be taken into account. In general, cold-rolled and cold-drawn flats are more costly but offer excellent precision and surface quality, while hot-rolled flats are relatively low cost but may require subsequent surface treatment.
Reliability of supply: Consider the reliability of supply and production lead time of the material. In some cases, the choice may be limited by supply channels or production lead times, depending on the actual situation.
Taking into account the above factors, you can choose the appropriate material according to the specific needs of use and economic conditions.