Definition of products
In the analysis of varieties, the first thing to be clear is the definition of these products. These common names usually refer to low-carbon steel coil
Pickling: usually refers to the hot-rolled steel coil after pickling line to remove the surface
Hard rolling: usually refers to the hot-rolled coil after pickling, by cold rolling mill thin, but without annealing products.
Cold rolling: usually refers to the product of hard rolled coil after complete or incomplete annealing.
Cold forming: usually refers to hot-rolled pickling strip produced by ESP continuous casting and rolling process.
Differences in production process
The traditional pickling process before cold rolling and annealing is different from pickling
However, cold forming is a new product, which is produced by the ESP production line (combining the continuous casting and hot rolling processes into one unit). This process has the characteristics of low cost and thin hot rolling thickness,
which is the main direction of many domestic steel mills in recent years.
Differences in comprehensive performance and Application
Compared with hot rolling, pickling coil has no change in the base material, which is often used in the occasions
with higher surface quality requirements for hot rolling. Common brand SPHC, commonly known as "pickling C material" in the industry.
The price of hard rolled coil is not cheap, and the formability and surface quality are not good, so it is usually
used only in some specific industries with thin specifications and low performance requirements, such as umbrella ribs or factory changing boxes. Common brand cdcm-spcc, commonly known as "cold hard C material" in the industry
performance of cold rolled coil is very good, but the disadvantage is that the price is the most expensive. Common brand SPCC, commonly known as "cold rolled C material" in the industry.
The formability of cold-formed coil is much better than that
of hard rolled coil, but not as good as that of cold-rolled coil (mainly due to the influence of heat treatment capacity and large flat work hardening after pickling). The outstanding advantage is that the cost is very low, especially in the thickness
range of 1.0 ~ 2.0, which is used to replace the cold rolled products with low forming requirements (such as rolling, bending, etc.).
Common cold forming brands of ESP include RECC and recd of Rizhao, MCFC of Masteel, etc.