Characteristics of cold rolled steel plate

Brief introduction of ordinary cold rolled plate
It is a product obtained by cold pressing of hot-rolled sheets. Due to the multi-pass cold rolling, its surface quality is better than that of hot-rolled sheet, and after heat treatment, good mechanical properties can be obtained.
1. Classification of the use of ordinary cold-rolled plates
According to the different needs of production enterprises, cold-rolled sheets are usually divided into:
Generally used cold-rolled sheet, stamping-grade cold-rolled sheet, deep-drawing, extra-deep-drawing and ultra-deep-drawing-grade cold-rolled sheet,
Generally delivered in coils and flat sheets, the thickness is expressed in millimeters,
The width is generally: 1000mm and 1250mm, and the length is generally 2000mm and 2500mm.
2. The grade of ordinary cold-rolled plate
Common grades are:
Q195, Q215, Q235, 08AL, SPCC, SPCD, SPCE, SPCEN, ST12, ST13, ST14, ST15, ST16, DC01, DC03, DC04, DC05, DC06, etc.;
ST12:
Expressed as the most common steel grade, the material is basically the same as that of Q195, SPCC, and DC01 grades;
ST13/14:
The steel grade expressed as stamping grade is basically the same as the material of 08AL, SPCD, DC03/04 grades;
ST15/16:
The steel grade expressed as stamping grade is basically the same as the material of 08AL, SPCE, SPCEN, DC05/06 grades.
3. The method of expressing the grade and size of ordinary cold-rolled plates
For example, ST12 produced by Anshan Iron and Steel Co., Ltd., 1*1250*2500/C, expressed as: grade ST12 ordinary cold plate, thickness is 1mm, width is 1250mm, length is 2500mm or C coil.
The appearance is packaged with white iron skin, and the mechanical properties are the most common and basic steel grades, which can only be used for bending and forming, not for stamping. Used for mechanical bite,
For example, the shell of the refrigerator, the fuel tank of the vehicle, etc.
Products above ST13 are used in industries that require deep drawing, such as automobile manufacturing, fuel tanks for diesel engines, etc., which one to use depends on the deep drawing requirements.
The difference between ST12 and SPCC: The mechanical properties of the two products are almost the same, but the annealing method is different. The tensile properties of the ST12 material are relatively stronger than that of SPCC.
Japanese JIS standard material meaning
SPCC---S means steel (Steel), P means plate (Plate), C means cold (Cold), C means commercial (Commercial), which is the Japanese JIS standard.
If you need to ensure the tensile strength, add T at the end of the grade, which is: SPCCT.
SPCD---indicates cold-rolled Carbon Steel sheet and strip for stamping, which is equivalent to China's 08AL (13237) high-quality Carbon Structural Steel.
SPCE---Indicates cold-rolled carbon Steel Sheet and strip for deep drawing, which is equivalent to China's 08AL (5213) deep drawing steel.
If non-timeliness is required, add N at the end of the grade to be SPCEN.
Cold-rolled carbon steel sheet and strip quenching and tempering code: annealed state is A, standard quenching and tempering is S, 1/8 hardness is 8, 1/4 hardness is 4, 1/2 hardness is 2, full hardness is 1. Surface processing code: D for dull finish rolling, B for bright finish rolling.
For example, SPCC-SD represents a standard quenched and tempered, matte finish rolled general-purpose cold-rolled carbon sheet.
Another example is SPCCT-SB, which means standard quenching and tempering, bright processing, and cold-rolled carbon sheets that require guaranteed mechanical properties.
Another example is SPCC-1D, which means a hard matt finish cold-rolled carbon steel sheet.
The expression method of steel grades for mechanical structures is: S + carbon content + letter code (C, CK), where the carbon content is represented by the median value * 100, the letter C represents carbon, and the letter K represents carburizing steel. For example, carbon knot coil S20C has a carbon content of 0.18-0.23%.