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The domestic production development of cold roll forming steel

China‘s cold roll forming steel production started in the 1950s and 1960s, and was concentrated in some areas, such as Wuhan, Anshan, Shanghai and Chongqing, that are mainly in the agricultural machinery industry. In the 1980s, it ushered in the first development tide, and the manufacturers expanded to east China, north China and northeast China.

       The service scope of cold roll forming steel also extended to the trucks, buses, building doors and windows, highway guardrail, shelves, electrical appliances and other industries, but are limited to small and medium-sized units with less variety specifications (about 2000). The materials were all carbon steel, and the total cold roll forming steel output accounted for only 1-1.5% of the total amount of steel, which was very different from the forging developed countries. The varieties specifications of cold roll forming steel abroad generally are 8000-10000, and the alloying steel of material diversification accounts for 50-70%. Cold roll forming steel production accounted for 5% total steel production. As a result, there is a lot of room for the development of cold roll forming steel in China.

Due to the rapid development of China‘s steel industry, especially the constant improvement of plate which has reached to 41.46%, it provides ample raw materials for the development of cold roll forming steel. The increase of plate and strip also inevitably promote the development of deep processing industry. In the application field, the advantages of cold rolled section steel are more and more recognized by the user. It is and efficient steel with economic section, and can save 15-30% metal. With features like small investment, flexible production, customization demand, the equipment is shining in the personalized market with unique superiority.

As of now, there are more than 1,000 production lines in China, with a capacity of 15 million tons per year. The newly built and constructed phi 200 - phi 660mm large unit has 50 sets, concentrated in east China, north China and the northeast. Cold rolled section steel is mainly used in highway construction, steel structure, automobile manufacturing, container, railway vehicle, steel formwork and scaffolding, bridges, electrical cabinets, hanging conveyor, steel cable tray, shelves, the elevator guide rail, keel, vegetable greenhouses, agricultural machinery, grain storage, furniture and fire equipment, etc. According to the survey of nine industries by the Cold Roll Forming Steel Association, the current demand is 438.45 million tons per year in total, accounting for 2.4%of the total amount.

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