Cold Rolling Line and Hot Rolling Line
Cold rolling production line
The 1380mm cold rolling production line with capacity of 600,000 tons, can produce the plate in specifications of 0.12-1.2mm*800-1250mm. The production line adopts advanced all hydraulic adjustment system ,leading to flexible control and stablequality. In addition,the line adopts thickness gauge to realize AGC plate thickness automatic conetrol in order to ensure quality. Cold rolled coil has excellent shape,good surface quality,high surface smoothness,It is easy to be coated and has different varieties,Cold-rolled coil is widely used in galvanizing ,household appliances, Cooper making,automotive,construction industry and enamel industry.
| Use | Material | Yield Strength | Tensile strength | Elongation % | Hardness | 180° cold bending |
|---|---|---|---|---|---|---|
| Tin plated substrate | Q195L | - | ≥380 | T2.5-T3 | - | |
| Chrome plated substrate | Q195L | - | ≥400 | (HR30T)65-70 | - | |
| General use | SPCC | ≥230 | 270-400 | ≥42 | - | Intact, no cracks |
| Q195L | ≥275 | 300-400 | ≥40 | - | Intact, no cracks | |
| Enamel materials or stamping parts | SPCC | ≥230 | 270-360 | ≥44 | - | Intact, no cracks |
| 08AL | ≥240 | 270-360 | ≥4 | - | Intact, no cracks | |
| Q195L | ≥275 | 300-380 | ≥42 | - | Intact, no cracks | |
| Stamping | SPCC | ≥220 | 270-340 | ≥45 | - | Intact, no cracks |
| 08AL | ≥220 | 200-270 | ≥46 | - | Intact, no cracks | |
| Q195L | ≥260 | 300-340 | ≥44 | - | Intact, no cracks |
DIN EN 10130, 10209 and DIN 1623
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 DCO6ED 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.
| 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 | 1.033 | ≤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 |
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.
| Quality | Testing direction | Material-No. | Yield point Rp0,2 (MPa) | Tensile strength Rm (MPA) | Elongation A80 (in %) min. | r-Value 90° min. |
|---|---|---|---|---|---|---|
| DC01EK | Q | 1.039 | ≤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 |
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 |
Hot Rolling Line
Hot-rolled coil is a development of the varieties of steel the current markei demand many concentraced in the automobile industry,compressor industry,machinery manufacfuring,processing and distribution industry,fan industry,motorcycle industry,steel furniture,hardware accessories,electrical cabinets and shelves of various shapes,such as stamping parts. As technology advances,hot-rolled pickling coil has been related to household appliances,containers,electrical control cabinet and other industrise,including the use of pickling hot-rolled coil instead of cold plate in some industry development is rapid.
Hot rolled steel coils
Hot rolled steel coils are hot rolled steel made into relatively thin flat pieces and wound up into coils, resembling a wound steel strip. Hot rolled steel coils are widely used in applications like home appliances where saving weight and aesthetic value is deemed essential. It is also frequently used as a work-piece for the further production of cold-rolled products. As a specialized hot rolled coil supplier, CUMIC Steel keeps developing and provides high quality china hot rolled coil with competitive price.
| Grade | Stretching test | ||||||
|---|---|---|---|---|---|---|---|
| Yield strength Rm(MPa) | Tensile strength Rm(MPa) | Elongation after break A% | |||||
| 1.8-<2.0 | 2.0-<2.5 | 2.5-<3.2 | 3.2-<4.0 | ≥4.0 | |||
| SPHC | / | ≥279 | ≥29 | ≥30 | ≥31 | ≥32 | ≥32 |
| SPHD | ≤290 | ≥270 | ≥32 | ≥33 | ≥35 | ≥37 | ≥39 |
| SPHE | ≤270 | ≥270 | ≥33 | ≥35 | ≥37 | ≥39 | ≥41 |
| SS330 | ≥205 | 330-430 | ≥26 | ||||
| SS400 | ≥245 | 400-510 | ≥21 | ||||