What is the difference between DC01 DC02 DC03 DC04?
DC stands for DIN 1623-1 Flat products of steel; Cold rolled strip and sheet of mild unalloyed steels.
01, 02, 03, and 04 represent different levels of deep-drawing performance, with higher numbers indicating better performance.
DC01 Cold Rolled Steel Sheet Details
| standard | AISI, ASTM, BS, DIN, GB, JIS |
| material | DC01 Cold Rolled Steel Sheet |
| surface | mild steel plain finish, hot dip galvanized, color coated, ect. |
| Size Tolerance | +/- 1%~3% |
| Other processing method | Cutting, bending, punching, or as customer's request |
| Size | Thickness from 0.15mm-300mm, width from 50mm-3500mm, length from 1m-12m or according to customer's special request |
| Process Method | Hot roll, cold roll, cold drawn, ect. |
Hot rolling and Cold Rolling
Hot rolling
Hot rolling uses slabs (primarily continuously cast slabs) as raw material. After heating, the steel strip is produced in roughing and finishing mills. The hot strip exiting the final stand of the finishing mill is cooled by laminar flow to the set temperature and then coiled into a coil by a coiler. The cooled coil is then processed according to customer needs.
Steel plate, flat coil, and slit strip products are then processed through various finishing lines (flattening, straightening, cross-cutting or slitting, inspection, weighing, packaging, and marking). Simply put, hot rolling involves heating a steel billet (the kind you see on TV, glowing red hot), passing it through several rolling passes, trimming it, and straightening it into steel plate.
Cold Rolling
Cold rolling uses hot-rolled coil as raw material, pickling it to remove the scale, and then continuously cold rolling it. The finished product is hardened coil. The cold work hardening caused by continuous cold deformation increases the strength and hardness of hardened coil, while decreasing its toughness and ductility. This deteriorates its stamping performance and makes it suitable only for parts requiring simple deformation.
Hardened coil can be used as raw material in hot-dip galvanizing plants, as hot-dip galvanizing units are all equipped with annealing lines. Hardened coil generally weighs 6 to 13.5 tons and is continuously rolled from hot-rolled, pickled coil at room temperature. The inner diameter is 610mm.
Product Features: Because it is not annealed, its hardness is very high (HRB greater than 90), resulting in extremely poor machinability. It can only be bent in a simple, directional manner (perpendicular to the coiling direction) of less than 90 degrees. Simply put, cold rolling is a process that produces hot-rolled coil. The process generally involves hot rolling, pickling, and cold rolling.
Cold rolling is performed at room temperature using hot-rolled coil. Although the steel heats up during the rolling process, it is still called cold rolling. Because hot-rolled coil undergoes continuous cold deformation, cold rolling exhibits poor mechanical properties and is too hard.
Annealing is required to restore its mechanical properties. Unannealed coil is called hard rolled coil. Hard rolled coil is generally used for products that do not require bending or stretching.
GNEE STEEL mainly specialized in various kinds of steel products, such as galvanized steel sheet and plate, coil and strip,PPGI,PPGL,cold rolled galvanized steel,etc.GNEE STEEL can also customize products according to orders, fulfilling all customers' requests by providing convenient one-stop service. The company has been certified by SGS, and all production process is strictly conforms to the international standard to ensure the quality.
