Periodic pits or convex hulls appear on the surface, and severe roll marks cause the strip to pass through.
The strip weld is too high or the cleaning is uneven, causing the sticking roller when rolling; 2The hard metal (bead, metal scrap, etc.) or dirt is stuck on the roller. When rolling or leveling, the hard object or the dirt is pressed. On the surface of the strip, leaving an indentation.
| Manufacturer | Thickness | Width | Length of plate | Inner diameter of coil |
| 0.3-2.5mm | 1000-1500mm | 1000-6000mmDC01/ ST12 | 508mm/610mmCS TYPE A/B/C | |
| Private factories | 0.14-0.9mm | 50/610/762/914mm |
The annual capacity of 1250mm cold rolled sheet production line is 200,000 tons while 1450mm’s is 250,000 tons. This production line is equipped with advanced detecting system of laser velocimeter imported.
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