Overview of Cold Rolled Steel Coil
The cold rolled coil is made of hot rolled coil. In cold rolled process, the hot rolled coil is rolled below the recrystallization temperature, and the generally rolled steel is rolled at room temperature. Steel sheet with high silicon content has low brittleness and low plasticity, and needs to be preheated to 200 °C before cold rolling. Since the cold rolled coil is not heated during the production process, there are no defects such as pitting and iron oxide which are often found in hot rolling, and the surface quality and the finish are good.
Chemical Composition of Cold Rolled Steel Coil
|
Steel Grade |
C |
Mn |
P |
S |
Al |
|
|
DC01 |
SPCC |
≤0.12 |
≤0.60 |
0.045 |
0.045 |
0.020 |
|
DC02 |
SPCD |
≤0.10 |
≤0.45 |
0.035 |
0.035 |
0.020 |
|
DC03 |
SPCE |
≤0.08 |
≤0.40 |
0.030 |
0.030 |
0.020 |
|
DC04 |
SPCF |
≤0.06 |
≤0.35 |
0.025 |
0.025 |
0.015 |
Mechanical Property of Cold Rolled Steel Coil
|
Brand |
Yield strength RcL Mpa |
Tensile strength Rm Mpa |
Elongation A80mm % |
Impact test (longitudinal) |
|
|
Temperature °C |
Impact work AKvJ |
|
|
|
|
|
SPCC |
≥195 |
315-430 |
≥33 |
|
|
|
Q195 |
≥195 |
315-430 |
≥33 |
|
|
|
Q235-B |
≥235 |
375-500 |
≥25 |
20 |
≥2 |
Cold rolled Coil Grade
1. The Chinese brand No. Q195, Q215, Q235, Q275——Q—the code of the yield point (limit) of ordinary carbon structural steel, which is the case of the first Chinese phonetic alphabet of "Qu"; 195, 215, 235, 255, 275 - respectively represent the value of their yield point (limit), the unit: MPa MPa (N / mm2); due to the comprehensive mechanical properties of Q235 steel strength, plasticity, toughness and weldability in ordinary carbon structural steel The most, it can better meet the general requirements of use, so the scope of application is very wide.
2. Japanese brand SPCC - Steel, P-Plate, C-cold, fourth C-common.
3. Germany grade ST12 - ST-steel (Steel), 12-class cold-rolled steel sheet.
Application of Cold Rolled Steel Coil
The cold-rolled coil has good performance, that is, through cold rolling, cold-rolled strip and steel sheet with thinner thickness and higher precision can be obtained, with high straightness, high surface smoothness, clean and bright surface of cold-rolled sheet, and easy coating. The plated processing, variety, wide use, and the characteristics of high stamping performance and non-aging, low yield point, so cold rolled sheet has a wide range of uses, mainly used in automobiles, printed iron drums, construction, building materials, bicycles, etc. The industry is also the best choice for the production of organic coated steel sheets.
Detail drawing
