4189532816
Product Number: 4189532816
HITS: 423 DATE: 2025/4/18
SPECS: complete in specifications
PRICE: Bargaining
UNIT: TON/MT
PLACE: China
Description
Rolled plates are one of steel sheets, and are actually thin steel sheets that are long and narrow and supplied in rolls. The coil and flat plate are almost like a cut-and-pack cold hard coil plate. The hot-rolled coil plate is obtained by pickling and cold rolling. It can be said to be a type of cold rolled coil. Cold-rolled coil (annealed state): The hot-rolled coil is obtained by pickling, cold rolling, cover annealing, flattening, (finishing). There are three main differences between the two: 1. In terms of appearance, the cold and hard curly plate is a bit slight black. 2. Cold-rolled plates such as surface quality, structure, and dimensional accuracy are better than cold hard coil plates. 3. In terms of performance, the cold hard coil plate directly obtained by the hot-rolled coil plate through the cold rolling process will be hardened during cold rolling, resulting in an increase in yield strength and a part of the internal stress remaining, which is more "hard", so it is called a cold hard coil plate. Cold-rolled coil (annealed state): It is obtained by the cold-hard coil after cover annealing before rolling. After annealing, the work hardening phenomenon and internal stress are eliminated (significantly reduced), that is, the yield strength is reduced close to before cold rolling. Therefore, the yield strength: the cold-hard rolled coil is greater than the cold-rolled rolled coil (annealed state), making the cold-rolled rolled coil (annealed state) more conducive to stamping and forming. Generally, the default delivery state of cold-rolled coils is annealed. Most of the steel is sold as coils. After purchasing coil materials, enterprises have to go through the unwinding process before processing, which is generally used more in the automotive industry. Of course, many automobile industries outsource the unrolling process, and factories directly use the unrolled plates
