Classification Of Cold Rolled Steel Plates
Introduction of cold rolled steel
First, cold-rolled steel plate
Is a product obtained by hot-pressing a hot-rolled sheet by cold pressing. As a result of multi-pass cold rolling, the surface quality is better than hot-rolled sheet, after heat treatment, can get good mechanical properties.
1, the use of cold-rolled steel plate classification
According to the different needs of production enterprises, usually cold-rolled plate is divided into: the general use of cold-rolled plate, stamping grade cold-rolled plate, deep drawing, Cold-rolled Steel Plates deep drawing and ultra-deep drawing cold-rolled plate, generally coil and flat , The thickness in millimeters, the width is generally: 1000mm and 1250mm, the length is generally 2000mm and 2500mm.
2, cold-rolled steel plate grades
Commonly used grades: Q195, Q215, Q235, 08AL, SPCC, SPCD, SPCE, SPCEN, ST12, ST13, ST14, ST15, ST16, DC01, DC03, DC04, DC05, DC06,
ST12: expressed as the most common steel, and Q195, SPCC, DC01 grade material is basically the same;
ST13 / 14: expressed as the stamping grade steel, and 08AL, SPCD, DC03 / 04 grade material is basically the same;
ST15 / 16: expressed as the stamping grade steel, and 08AL, SPCE, SPCEN, DC05 / 06 grade material is basically the same.
3, cold-rolled steel plate size design method
For example, Anshan Iron and Steel production ST12,1 * 1250 * 2500 / C, expressed as: grade ST12 ordinary cold plate, the thickness of 1mm, width of 1250mm, length of 2500mm or C coil. The appearance of white tin fine packaging, mechanical properties for the most common, the most basic steel, Cold-rolled Steel Plates can only be used for bending, can not be used for stamping. Used in mechanical bite, such as the refrigerator shell, vehicle fuel tank and so on.
ST13 above products, used in the need for deep drawing of the industry, such as automobile manufacturing, diesel fuel tank, etc., the specific use of which, depending on the requirements of the deep drawing.
ST12 and SPCC difference: the mechanical properties of its two products are almost the same, Cold-rolled Steel Plates but different returns, ST12 material tensile properties of products compared to SPCC stronger.
Japan JIS standard material meaning
SPCC --- S is steel, P is plate, C is cold, C is commercial, and Japanese JIS standard.
To ensure the tensile strength, at the end of the grade plus T, for: SPCCT. SPCD --- said cold stamping carbon steel sheet and strip, equivalent to China 08AL (13237) high-quality carbon structural steel. SPCE --- that deep-rolled with cold-rolled carbon steel sheet and strip, the equivalent of China 08AL (5213) deep drawing steel. To ensure non-timeliness, add N to SPCEN at the end of the grade. Cold-rolled carbon steel sheet and strip conditioning code: annealing state A, the standard quenched and tempered S, 1/8 hardness of 8,1 / 4 hardness of 4,1 / 2 hardness of 2, the total hardness of 1. Surface processing code: matte finish for the D, bright finishing for the B For example, SPCC-SD is a standard cold-rolled carbon sheet with standard quenched and tempered finish. Another example is the SPCCT-SB standard quenched and tempered, bright processing, requiring the guarantee of mechanical properties of cold-rolled carbon sheet. Again, SPCC-1D represents a hard matte finish rolled cold rolled carbon steel sheet. (C, CK), where the carbon content is represented by the intermediate value * 100, the letter C is carbon, and the letter K is the carburized steel. Cold-rolled Steel Plates Such as carbon knot plate S20C its carbon content of 0.18-0.23%.
China GB standard material meaning
From the brand is basically divided into: Q195, Q215, Q235, Q255, Q275 and so on. Q25, Q235, Q255, Q275, the higher the grade, the higher the carbon content of the low-carbon steel grades Q195, Q215, Q235, Q255, Q275, the higher the carbon content of the steel grades. The higher the amount of manganese, the more stable the plasticity.