Cold rolled steel sheet are mainly used in automobile, printed
metal pail, building, building materials, and bicycle, etc.
Additionally, it is the best material to manufacture organic coated
strip.
Standard:JIS, ASTM, EN10130
Grade: SPCC, SPCD, ST12, ST13, ST14/16, DC01, DC02, DC03, DC04,
DC05, DC06, Q195, Q195L,SAE1008,SAE1006
Szie: Thickness: 0.2-2.0mm
Width:15-1500mm.
(1) when the strip steel is rolled in a cold state, because of the
work hardening of the strip steel, it must be softened again by
intermediate annealing, and its plasticity should be restored in
order to continue rolling;
(2) Before rolling, the surface scale of strip steel must be
removed, thus ensuring the surface smoothness of strip steel and
reducing the wear of rolls;
(3) Tension rolling is adopted, which ensures the good shape of
strip steel, controls the thickness deviation of strip steel,
reduces the rolling pressure, and is beneficial to rolling thin
gauge products.
(4) Process cooling and lubrication are adopted, which is
convenient to control the temperature of the roll and strip steel,
reduce the friction between the roll and strip steel and reduce the
rolling pressure, which is beneficial to the shape control and
prevents the strip steel from sticking to the roll.
Cold rolled steel strip is widely used in cutting-edge technical fields, such as
automobile, instrumentation, radio, national defense and aerospace
industry, etc.
Technical data
Cold rolled steel according DIN EN 10130, 10209 and DIN 1623| Quality | Testing direction | Material-No. | Yield point Rp0,2 (MPa) | Tensile strength Rm (MPA) | Elongation A80 (in %) min. | r-Value 90° min. | n-Value 90° min. | Old Description |
| DC01 | Q | 1.0330 | ≤280 | 270 – 410 | 28 | | | St 12-03 |
| DC03 | Q | 1.0347 | ≤240 | 270 – 370 | 34 | 1,30 | | St 13-03 |
| DC04 | Q | 1.0338 | ≤210 | 270 – 350 | 38 | 1,60 | 0,18 | St 14-03 |
| DC05 | Q | 1.0312 | ≤180 | 270 – 330 | 40 | 1,90 | 0,20 | St 15-03 |
| DC06 | Q | 1.0873 | ≤170 | 270 – 330 | 41 | 2,10 | 0,22 | |
| DC07 | Q | 1.0898 | ≤150 | 250 – 310 | 44 | 2,50 | 0,23 | |
| Quality | Testing direction | Material-No. | Yield point Rp0,2 (MPa) | Tensile strength Rm (MPA) | Elongation A80 (in %) min. | r-Value 90° min. | n-Value 90° min. |
| DC01EK | Q | 1.0390 | ≤270 | 270 – 390 | 30 | | |
| DC04EK | Q | 1.0392 | ≤220 | 270 – 350 | 36 | | |
| DC05EK | Q | 1.0386 | ≤220 | 270 – 350 | 36 | 1,50 | |
| DC06EK | Q | 1.0869 | ≤190 | 270 – 350 | 38 | 1,60 | |
| DC03ED | Q | 1.0399 | ≤240 | 270 – 370 | 34 | | |
| DC04ED | Q | 1.0394 | ≤210 | 270 – 350 | 38 | | |
| DC06ED | Q | 1.0872 | ≤190 | 270 – 350 | 38 | 1,60 | |
| Quality | Testing direction | Material-No. | Yield point Rp0,2 (MPa) | Tensile strengthRm (MPA) | Elongation A80 (in %) min. | DIN 1623 T2 (old) |
| S215G | Q | 1.0116G | ≥215 | 360 – 510 | 20 | St 37-3G |
| S245G | Q | 1.0144G | ≥245 | 430 – 580 | 18 | St 44-3G |
| S325G | Q | 1.0570G | ≥325 | 510 – 680 | 16 | St 52-3G |
Cold rolled steel is also part of our product portfolio. Cold
rolled steel is excellent for cold forming. This product group
assigned the grades DC01 to DC07, DC01EK to DC06EK, DC03ED to
DC06ED and S215G to S325G.
The grades are classified according to the maximum permissible
yield strength and can be subdivided as follows.
DC01 – This grade can be used for simple forming work, for example
Bending, embossing, beading and pulling are used.
DC03 – This grade is suitable for forming requirements such as Deep
drawing and difficult profiles suitable.
DC04 – This quality is suitable for high deformation requirements.
DC05 – This thermoforming grade is suitable for higher forming
requirements.
DC06 – This special deep drawing quality is suitable for the
highest deformation requirements.
DC07 – This super deep drawing quality is suitable for extreme
deformation requirements.
Enamelled grades
The steel grades DC01EK, DC04EK and DC06EK are suitable for
conventional single-layer or double-layer enamelling.
The steel grades DC06ED, DE04ED and DC06ED are suitable for direct
enamelling as well as for enamelling according to the two-layer /
one-firing method and for special applications of two-layer
enamelling for low-distortion enamelling.
Surface type
Surface A
Mistakes such as pores, small grooves, small warts, slight
scratches and a slight discoloration that does not affect the
ability to reshape and adhere to surface coatings are permitted.
Surface B
The better side must be free from defects so that the homogeneous
appearance of a quality finish or an electrolytically applied
coating is not impaired. The other side must at least meet the
requirements of surface type A.
Surface finish
The surface finish may be particularly smooth, dull or rough. If no
details are given when ordering, the surface finish will be
delivered in a matt finish. The four surface finishes listed
correspond to the center roughness values in the following table
and must be tested in accordance with EN 10049.
| Surface finish | characteristic | Average surface finish
(boundary value: 0,8mm) |
| Special flat | b | Ra ≤ 0,4 µm |
| flat | g | Ra ≤ 0,9 µm |
| Matt | m | 0,60 µm ˂ Ra ≤ 1,9 µm |
| rough | r | Ra ≤ 1,6 µm |
