It is a compact, light duty type of Hyper UC-mill, a RCM, employing smaller diameter work rolls, thus reducing rolling loads. It allows the production of thinner materials of high quality at fewer costs. Also, the mill concept saves investment and maintenance costs. The solution set up at SUNSCO will be the first case of Hyper UC-mill to expand the original mill concept to the production of thinner and soft material by using optimized roll forces.
Scope of supply
Primetals’ scope of supply encompasses the complete mechanical and electrical equipment. Primetals will be responsible for the supervision of installation and commissioning as well. The light mill will process thin sheets with end-product thicknesses down to 0.2 mm and a width of 1,250 mm (4 feet). This particular mill can produce sheets as thin as 0.1 mm. It, along with No. 1 CRM previously delivered by Primetals, will increase its annual production capacity to total 250,000 t.
Hyper UC-mill was developed by Primetals to achieve high performances of strip gauge and flatness control for High Strength Steel (HSS) rolling. This technology is also applicable for rolling high grades of non-grain oriented silicon steel and thinner products. The technology stands on an optimised roll diameter combination (small work, intermediate and back-up rolls,) a “work roll driven system” to achieve high flatness controllability, and the development of a high strength small diameter spindle to drive the work roll.
Growing demand for thinner materials for building and construction
The new mill will enable SUNSCO to build a stable position in the market with the growing demand for thinner materials for the building and construction industries. Under the climatic conditions prevalent in Southeast Asian countries like Vietnam, thinner sheet-based roof materials need to be replaced regularly and are therefore in high demand. The challenge is to produce building materials durable and of high quality, but with continually reduced thickness to save costs.
SUNSCO was established in 1996 as the first 100 % foreign capital invested steel company in Vietnam. The company produces and sells the following items: molten zinc, 55% Al-Zn galvanised steel coil, color coated steel coil, and steel pipe. The products are mainly used for civil and building construction, structural uses, furniture, bicycle and motorbike parts and other industrial uses. The company is part of the Maruichi Group, with Maruichi Steel Tube Ltd. holding 72.53 % of the shares.
