Stainless steel is not easy to rust steel, in fact, part of stainless steel, have both stainless, and acid resistance, corrosion resistance).Stainless steel does not rust and corrosion resistance is due to its rich chromium oxide film on the surface (passivation film).This is not to rust and corrosion resistance is relative.Experiment shows that the steel in the atmosphere, the weak medium such as water and nitric acid oxidation, such as medium, its corrosion resistance increased with the increase of the water content of chromium in steel, when the chromium content reaches a certain percentage of steel corrosion resistance mutation, that is, from easy to rust is not easy to rust, never corrosion resistant to corrosion.
China's private stainless steel enterprises occupy the important position in the market, private stainless steel enterprise development present situation as follows:
1. Private steel mills has expanded rapidly, the production capacity, status enhances unceasingly.
The birth of private stainless steel enterprises solve the civil steel grade stainless steel aspects from scratch, from there to the good problem;China's private stainless steel enterprises laid a solid foundation for the development of Chinese stainless steel industry.Capacity increase rapidly.Now private stainless steel enterprises factory capacity accounts for the total capacity of up to 60%.
2. Private steel plant layout regionalization, industry layout rationalization.
According to the coast, along the Yangtze river, inland scientific and rational layout and corresponds to the resources and environment requirements, move backward, corporate restructuring and urban steel plant, in the national standard and revitalization of the steel industry and the revitalization of the planning, under the premise of total control, adjusting and optimizing industrial layout, industrial layout is obviously improved, but most of the steel mills are still concentrated in jiangsu and zhejiang, guangdong, fujian and other coastal provinces.From the industry layout of southwest, henan jin hui, stainless steel wide green science and technology, the north sea, fujian ding letter is all stainless steel enterprise unique large private enterprises, is also the leader of the local industrial enterprise, whether it is the support of local protectionism, or the need of industry planning, they will still exist and rational development for a long time.
3.Product varieties, specifications and diverse, the main products of the private steel mills transition from narrow to wide plate.
Mainstream private stainless steel enterprise scale enterprises, after many years of market segmentation, stainless steel materials are: stainless steel belt, stainless steel rods, stainless steel plate, stainless steel wire, stainless steel pipe;The current mainstream products involving steel in 201 hot strip copper, 201 hot strip high copper, 304 hot strip is given priority to;202 hot strip, 301 hot strip hot rolling belt, D7, D11 hot strip for supplementary form a private steel mills products system;The thickness of the product specification is 2.0 mm to 5.0 mm as the main body;Products range from 300 mm to 1520 mm width, mainstream - 620 - mm to 380 mm as the main body of the specifications of the sales.
4.New production technology constantly, "stainless steel nickel iron" is a new industry.
In addition to perfecting and upgrading existing hot rolling equipment, private small smelters in smelting practice equipment also constant self-improvement, to explore more of the upstream industry chain is perfect, is committed to lower production costs, production process innovation.RKEF technology is a kind of technology nowadays is more fashionable.Now about eight domestic enterprises have the technology, the basic distribution in coastal areas, the process of nickel iron accounted for about 20 to 30 of the nickel pig iron production 20-30% annual output can reach 80000 tons of nickel.Jiangsu taizhou cavey stainless steel products co., LTD. Use RKEF process from nickel iron to stainless steel continuous casting and rolling process of integration model, and was a great success, and has set an example for other enterprises.In 2013 and 2014 will be a new start RKEF nickel iron works of dense phase, which since 2013, the domestic construction and proposed RKEF craft project nickel iron production capacity of 320000 tons, five companies of 140000 tons of production capacity will be put into production this year, including four companies take the industry pattern of "stainless steel nickel iron", in 2014 there were 2 companies a total of 80000 tons of nickel iron RKEF process project put into production, also copy "nickel iron stainless steel" integration business model.In a single nickel iron as, China's nickel iron enterprises are exploring and practice "nickel iron stainless steel" business model, also become an important direction of earnings in the next few years.
5. Constantly improve the resources utilization ratio, markedly enhance its capability of sustainable development.
Mainstream private hot rolled stainless steel enterprises to realize the basic guarantee in 88%, more enterprises can maintain in 93% the right of hot rolling yield.Scale enterprise after complete environmental protection technical renovation, even if the practice of smelting slag is further recycled steel, to a great extent on the stainless steel scrap consumption also has a strong ability, social fully recycle waste resources, saving our country important metallurgical resources are relatively scarce of nickel, chromium.
6. Flexible sales model is not a single, trade.
Only meet the domestic demand and exports this year also has a substantial increase.The signs (MEPS) release, global stainless steel production in 2016 will grow 2% right, production reached a record high of 42.3 million tons.After the fight, global stainless steel production in 2015 is expected to less than 41.5 million tons.
Signs of prediction, 2015 years of Chinese stainless steel production from 2014, a slight drop in output, the output of 2016 year-on-year growth of 1.7% modest right;2015 stainless steel production in Japan is likely to more than 3 million tons, is expected in 2016 stainless steel production in Japan will be compared to the same growth 5%.Although South Korea's stainless steel output strong year-on-year growth in 2015 was 9% the right, to fight, is expected in 2016, South Korea's stainless steel output could not continue to increase;A slight drop in production of stainless steel 2015 China Taiwan, expects its 2016 stainless steel production in 2015 will be a slight increase of 2.7% right;Although the production of stainless steel stainless steel production enterprises in the United States in 2015 from a year before the down slightly, but in 2016 is expected to moderate back to about 2.4 million tons.The signs, the stainless steel production in 2016, the eu is expected to rebound to the level of 7.25 million tons in 2014.