Duplex Stainless Steels Available
Yuhong Group supplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.
Duplex Stainless Steel Overview
Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.
Today, modern duplex stainless steels can be divided into three groups:
Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications. Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.
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DUPLEX STAINLESS STEEL
Lean Duplex such as LDX2101
Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
Super Duplex such as Ferralium 255 and Zeron 100 and LDX2507
What are the Characteristics of Duplex Stainless Steels ?
Very good resistance to uniform corrosion
Very good resistance to pitting and crevice corrosion
High resistance to stress corrosion cracking and corrosion fatigue
High mechanical strength
Good sulfide stress corrosion resistance
Good abrasion and erosion resistance
Good fatigue resistance high energy absorption
Low thermal expansion
Good weldability
In what Applications are Duplex Stainless Steels® used ?
Oil and gas equipment
Offshore technology
Seawater desalination plants
Chemical industry, especially when handling chlorides
Flue-gas cleaning
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Bridges
Storage tanks
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts
Guangdong port imported Taiwan machine tool surged 1.5 times in the first four months
China News Service, Guangzhou, May 13 (Suo Youwei, Liu Liyi, Zhang Baoxuan) Statistics released by Guangzhou Customs on the 13th showed that from January to April 2011, 8325 metal processing machine tools were imported through Guangdong Port, an increase of 28.8 over the same period last year. %. Among them, Taiwan has become the largest source of imports, and the volume of imported machine tools has increased by a factor of 1.5, accounting for 60% of total imports. Since December 2009, imported machine tools imported from Guangdong Port have maintained a year-on-year growth for 17 consecutive months. In February this year, the impact of the Spring Festival effect has declined. 1,284 units were imported in the same month, an increase of 9.6%. Imports in March and April rebounded significantly. According to customs data, in the first four months of this year, 4,651 machine tools were imported from Taiwan through the Guangdong port, a substantial increase of 1.5 times, accounting for 55.9%. At present, there are 107 mechanical products in the list of early receipts of Taiwan's exports to mainland China. Xu Xiuzhen, chairman of the Taiwan Machine Association, said that in 2011, the export value of machine tools in Taiwan is expected to exceed 4 billion US dollars, which is expected to surpass Italy for the first time and become the world's third largest machine tool export area. According to the arrangement of the Cross-Strait Economic Cooperation Framework Agreement (ECFA), some products will be reduced from January 1 this year, and zero tariffs will be realized in three steps in the next two years. The import of Taiwanese machine tools under zero-tariff assistance will continue to increase. Customs analysis said that after the financial crisis, China's economy continued to improve, manufacturing continued to grow rapidly, and there was a large demand for production equipment. According to data released by the China Federation of Logistics and Purchasing, the China Manufacturing Purchasing Managers Index (PMI) was 52.9% in April, although the chain fell by 0.5 percentage points, but still maintained a good level, which is conducive to maintaining stable demand for machine tools.