The manufacturing of Cold Rolled (CR) coils is carried out by the rolling metalworking process. For CR coils, the temperature of the steel is maintained below its re-crystallization temperature (usually room temperature). After the steel is melted below its re-crystallization temperature, it is passed through pairs of rolls to reduce its thickness and achieve uniformity. This process of manufacturing CR coils is termed ‘cold rolling’.
The cold rolling process helps to obtain the CR coils from the cooling of hot rolled pickled products (made from finest steel), that are reduced to much finer thickness with increased strength via strain hardening (up to almost 20%). The resulting CR coils are smaller as compared to the coils formed by the hot rolling process, and they are less ductile. They possess improved surface finish and tighter tolerances.
Hot Rolled Coils are made by continuously rolling steel at high temperatures, generally over 1,000 degrees Fahrenheit. It involves passing metal sheets, made from billets, through rollers above the metal’s (steel’s) recrystallization temperature. Metal sheets can be passed through the roller many times to achieve the desired size. During the cooling process, the hot rolled steel may reconfigure itself resulting in an end product that is more flexible and looser as compared to the original product. The hot-rolled coils are manufactured without much delay in order to avoid the need for reheating the steel during manufacturing. The entire process of manufacturing HR coils is known as hot rolling. As the steel cools off it automatically shrinks; usually, it is not easy to predict the size and shape of the end product of hot rolling.
Most of the time, the hot-rolled coils also undergo a treatment called pickling, which basically helps in removing impurities and inorganic contaminants. The process involves passing the hot rolled steel through an acidic solution which helps in removing the surface oxides and subsequently oiling the metal surface to make it corrosion-resistant.
It is a cold-rolled Coil that is coated with zinc metal which is known as Galvanising. GC Steel Coils are made from good quality steel that is resistant to rust. They are durable and have a smooth surface finish. The GC Coil is a type of plain corrugated galvanized sheet generally used in roofing. The GC Coils are always in rolls made With the latest technology and machine, We supply the highest quality GC Steel Coils. We offer these Coils at market-leading prices.
It is a cold-rolled Coils that is coated with zinc metal which is known as Galvanising. These coils are used in roofing and panelling, automobile bodies, trunks/boxes, ducting, cooler body and many other products. GP Steel Coils are made from good quality steel that is resistant to rust. They are durable and have a smooth surface finish. With the latest technology and machine, we supply the highest quality GP Steel Coils. We offer these sheets at market-leading prices.