The DC in DC01 means DIN 1623-1 (German cold-rolled plate standard) flat steel products mild steel cold-rolled strip and sheet. DC is DIN 1623-1 Flat products of steel; Cold rolled strip and sheet of mild unalloyed DC abbreviation in steels.
The deep drawing performance levels represented by 01, 02, 03 and 04 are different. The larger the number, the better the tensile performance.
Therefore, DC01, DC02, DC03, and DC04 represent different grades of cold-rolled steel, and their deep drawing properties are different.
01 ordinary material, 02, 03 and 04 deep drawing materials have better deep drawing performance the further they go.
DC01 is generally not used for stretching, only for simple bending;
DC02 can be used for shallow drawing, but is generally only used for bending;
DC03 can be said to be a tensile board;
DC04, the last one has the best tensile properties and can be used for deep drawing.
standard relationship
German standard DIN 1623 ST12 (DC01)
The corresponding European standard is EN 10130 DC01
The corresponding Japanese standard is JIS G 3141 SPCC
The corresponding American standard is ASTM A1008M CS
The corresponding enterprise standard of Wuhan Iron and Steel Co., Ltd. is Q/WG(LZ)20-2008 DC01
The corresponding Baosteel enterprise standard is Q/BQB 403 DC01
Differences in mechanical properties of DC01-07 grades
The difference between hot rolling and cold rolling
1. Hot rolling
Hot rolling uses slabs (mainly continuous cast slabs) as raw materials, and is heated to form strips by rough rolling units and finishing rolling units. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature through laminar flow, and is rolled into steel strip coils by the coiler. The cooled steel strip coils undergo different finishing operations according to the different needs of users. Lines (smoothing, straightening, cross-cutting or slitting, inspection, weighing, packaging and marking, etc.) are processed into steel plates, flat coils and slit steel strip products.
To put it simply, a piece of steel billet is heated (it is the red-hot steel block on TV) and rolled through several passes, then trimmed and straightened into a steel plate. This is called hot rolling.
2. Cold rolling
Cold rolling: hot-rolled steel coils are used as raw materials, and the oxide scale is removed by pickling and then cold-rolled continuously. The finished product is a hard-rolled coil. Due to the cold work hardening caused by continuous cold deformation, the strength, hardness, and toughness of the hard-rolled coils increase. The plastic index will decrease, so the stamping performance will deteriorate and it can only be used for parts with simple deformation.
To put it simply, cold rolling is processed and rolled on the basis of hot rolled coils. Generally speaking, it is a process of hot rolling--pickling--cold rolling.
Cold rolling is made from hot-rolled plates at room temperature. Although rolling will also heat up the steel plate during the processing, it is still called cold rolling. Since hot rolling undergoes continuous cold deformation, cold rolling has poor mechanical properties and too high hardness.
