Cold-rolled plates and strips are widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc.
Cold-rolled thin steel plate is the abbreviation of ordinary carbon structural steel cold-rolled plate. It is also called cold-rolled plate, commonly known as cold plate, and is sometimes mistakenly written as cold-rolled plate.
Cold plate is made of ordinary carbon structural steel hot-rolled steel strip, which is further cold-rolled into a steel plate with a thickness of less than 4mm. Since rolling at room temperature does not produce iron oxide scale, the cold plate has good surface quality and high dimensional accuracy. Coupled with annealing treatment, its mechanical properties and process performance are better than hot-rolled thin steel plates. In many fields, especially In the field of home appliance manufacturing, it has gradually been used to replace hot-rolled thin steel plates.
Applicable grades: Q195, Q215, Q235, Q275; SPCC (Japanese grade); ST12 (Germany grade)
Symbol meaning:
1. Q is the code name for the yield point (limit) of ordinary carbon structural steel, which is the uppercase and lowercase letters of the first Chinese pinyin letter of Qu;
195, 215, 235, 255.275 respectively represent the values of their yield points (limits), unit: MPa (N/mm2); due to the comprehensive mechanical properties of Q235 steel such as strength, plasticity, toughness and weldability, it is more suitable for ordinary carbon structures. It is the best among steels and can better meet general usage requirements, so it has a wide range of applications.
2. S-steel, P-plate, C cold-rolled, and fourth C-common.
3. ST-steel, 12-ordinary grade cold-rolled steel plate,
4. Marking: Dimensional accuracy, dimensional steel plate variety standards
Cold rolled steel plate: steel grade technical conditions standard
Marking example: B-0.57501500-GB708-88; steel plate, standard number Q/BQB402, grade SPCC, heat treatment state annealed + flat (S), surface center processing state is pitted D, surface quality is FB level trimming (cut Edge EC, untrimmed edge EM) steel plate, thickness 0.5mm, B-level accuracy, width 1000mm, A-level accuracy, length 2000mm, A-level accuracy, unevenness accuracy PF.A, then marked: steel plate ECQ/BQB402- SPCC - SD - FB/ (0. 51000A2000A-PF.A);Cold rolled steel plate: Q225 -GB912- -89
Cold-rolled ordinary thin steel plate: made of cold-rolled ordinary carbon structural steel or low-alloy structural steel. The surface quality of cold rolled plates is better. Has good stamping performance. The requirements are to ensure that the cold bending and cup tests are qualified. It is often used in automobile and other industries and as raw materials for coated plates.
Cold-rolled high-quality steel sheets: mainly include various high-quality steel cold-rolled sheets. The most commonly used are carbon structural steel sheets, especially cold-rolled steel sheets for deep drawing. They are cold-rolled sheets of low-carbon high-quality steel 08A1. The steel plates are based on the surface The quality is divided into three groups; I and II, which respectively represent particularly high-grade, high-grade and higher finishing surfaces. According to the drawing level, they are divided into ZF, HF and F grades (representing the most complicated, very complicated, Complex parts), according to the allowable deviation of the thickness of the steel plate, it is divided into two levels of accuracy, A and B, and is widely used in the automobile and tractor industry.
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