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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The equipment manufacturing project will be included in the provincial key construction plan. There will be 302 equipment manufacturing projects planned for this year, accounting for 56.4% of the total number of key industrial projects. The state cuts the funds for technical reform of the key industries in our province to the equipment manufacturing industry and arranges funds of 171.30 million yuan, accounting for nearly one-third of the total amount of cutting funds. From January to July, the province's equipment manufacturing investment growth and project construction were rapid. The accumulated investment was 49.276 billion yuan, a year-on-year increase of 51.4%, which was 9.5 percentage points higher than the national equipment manufacturing industry and 13.3 percentage points higher than the province's industry.
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
Hebei will give priority to equipment manufacturing projects included in the provincial key construction plan
From the Hebei provincial government’s adjustment meeting on the adjustment of key industries and implementation of the revitalization plan implementation advice, it was learned that from January to July of this year, the province’s equipment manufacturing industry could make profits with the steel industry. The economy of the equipment manufacturing industry stabilized and the total profit reached 11.383 billion yuan. The economic benefits of the iron and steel industry have still not improved fundamentally, generating a profit of 11.7 billion yuan, a large drop from the previous year.