Introduction of cold rolled coil

And cold-rolled coil (annealed state): it is obtained by bell-type annealing before the chilled coil is rolled. After annealing, its work hardening phenomenon, that is, the decrease in yield strength is close to that before cold rolling.

Definition of cold rolled coil

Cold-rolled coils are made of hot-rolled coils, which are rolled at room temperature below the recrystallization temperature, including plates and coils. Among them, those delivered in sheets are called steel plates, also called box plates or flat plates; those delivered in coils are called steel strips, also called coil plates.

Definition of cold rolling

It is rolling under recrystallization, but it is generally understood as rolling using normal temperature rolling materials. Aluminum cold rolling is divided into plate rolling and foil rolling. Those with a thickness of 0.15~ or more are called plates, and those with a thickness of 0.15~ or less are called foils. Europe and the United States mostly use 3~6 continuous rolling mills as cold rolling equipment.

Since there is no heating during the production process, there are no defects such as pits and scales that often occur in hot rolling, and the surface quality is good and the finish is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and structure of the products can meet some special requirements for use, such as electromagnetic properties and deep drawing properties.

Specifications: The thickness is 0.2-4mm, the width is 600-2000mm, and the length of the steel plate is 1200-6000mm.

Grade: Q195A-Q235A, Q195AF-Q235AF, Q295A(B)-Q345 A(B); SPCC, SPCD, SPCE, ST12-15; DC01-06

Performance: Low carbon steel grades are mainly used, which require good cold bending and welding performance, as well as certain stamping performance.

Application field

Cold rolled steel strip

It has a wide range of uses, 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, also known as cold-rolled plate, commonly known as cold-rolled plate, sometimes mistakenly written as cold-rolled plate. The cold plate is a hot-rolled strip of ordinary carbon structural steel, which is further cold-rolled into a steel plate with a thickness of less than 4mm. Due to rolling at room temperature, no iron oxide scale is produced. Therefore, the cold plate has good surface quality and high dimensional accuracy. Coupled with annealing treatment, its mechanical properties and process properties are superior to hot-rolled thin steel plates. In many fields, especially In the field of home appliance manufacturing, it has gradually replaced hot-rolled steel sheets.

Applicable grades: Q195, Q215, Q235, Q275; SPCC (Japanese grade); ST12 (German grade)

symbol:

1. Q- the code name of the yield point (limit) of ordinary carbon structural steel, which is the upper and lower case of the first Chinese pinyin letter of "Qu"; 195, 215, 235, 255, 275- respectively represent their yield point (limit ) value, unit: MPa (N/mm2); because the comprehensive mechanical properties of Q235 steel, such as strength, plasticity, toughness and weldability, are the best among ordinary carbon structural steels, it can better meet the general use requirements. requirements, so the scope of application is very wide.

2. S-Steel, P-Plate, C-Cold, and the fourth place C-Common.

3. ST-steel (Steel), 12-common grade cold-rolled thin steel plate, mark: dimension accuracy-size-steel plate variety standard cold-rolled steel plate: steel number-technical condition standard mark example: B-0.57501500-GB708-88; steel plate , Standard number Q/BQB402, brand SPCC, heat treatment state annealed + smooth (S), surface center processing state is pitted surface D, surface quality is FB grade trimmed (cut edge EC, uncut edge EM) steel plate, thickness 0.5 mm, grade B precision, width 1000mm, grade A precision, length 2000mm, grade A precision, roughness precision PF.A, then marked as: steel plate ECQ/BQB 402-SPCC-SD-FB/(0.51000A2000A-PF. A);'