It can be distinguished by its carbon content, which is slightly higher in hot rolled steel plate than in cold-rolled steel. The density is the same if the components are not very consistent. But if the composition is very different, such as stainless steel, whether cold rolled, hot rolled steel plate density is about 7.9g/cm³. Specific depends on the composition, hot rolled steel plate is just better ductility, steel is also subjected to pressure.
Can also be distinguished by density, hot rolled steel is divided into structural steel, low carbon steel, welded bottle steel, and then according to a variety of steel to find the required steel, in check the density and composition of specific steel.
Hot rolled steel plate surface quality almost (low oxidation finish), but good plasticity, generally for medium thick plate, cold rolled plate, high strength, high hardness, high surface finish, generally for sheet, can be used as a stamping plate.
Cold-rolled steel plate hardness is high, processing is relatively difficult, but not easy to deformation, high strength.
It can also be distinguished by the production process, which is different between hot and cold rolled steel plates. Hot rolled steel plate is rolled at high temperature, cold rolled is blasted at room temperature. In general, cold-rolled steel plates have better strength and hot-rolled steel plates have better ductility. The general thickness of cold rolling is relatively small, and the thickness of hot rolling can be larger. The surface quality, appearance and dimensional accuracy of cold-rolled steel plate are better than that of hot-rolled steel plate, and its product thickness is right-rolled to about 0.18mm, so it is more popular. For product acceptance, you can ask professionals to carry out.
Hot rolled steel plate, mechanical properties are far less than cold processing, is inferior to forging processing, but has better toughness and ductility.
Cold-rolled steel plate due to a certain degree of work hardening, low toughness, but can reach a good strength ratio, used for cold bending spring and other parts, at the same time because the yield point is close to the tensile strength, so there is no predictability of danger in the use process, when the load exceeds the allowable load prone to accidents.
Post time: Jan-18-2023