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.
Duplex Steel Fitting,Duplex Steel Pipe Fitting,Duplex Stainless Steel Fitting YUHONG GROUP CO.,LIMITED , https://www.jessro-pipefittings.com
Under the strong support of the leaders of COSCO Group's Safety Supervision Department and COSCO Shipbuilding Industry Co., Ltd., Nanjing International actively carried out technical research and quality improvement. After more than a year of hard work, the DK-28 exhaust valve and DK produced by Nanjing International in 2013. -20 Inlet and exhaust valves have successfully passed the product quality approval of Japan Daihatsu Co., Ltd., and obtained the quality approval certificate, and completed the first batch of product delivery of Anchai Company. In October 2013, the company signed a long-term cooperation agreement for both parties. The long-term cooperation has laid a solid foundation.
Through unremitting efforts, Nanjing International has seized 2,500 DK-20 exhaust valves, 1000 DK-20 intake valves and 1000 DK-28 exhaust valves. The "big order" signed this time is a testimony to the long-term strategic cooperation between the two sides, and it is a concrete manifestation of the common goal of "strong alliance, win-win cooperation", and made a response to the process of promoting the localization of the valve. Have contributed.
It is reported that the DK-28 intake valve of Nanjing International has passed the internal inspection of Anchai. After the inspection of Japan Daihatsu Co., Ltd. in May, Nanjing International can further seek cooperation with Anchai and strive to obtain more orders.
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
Recently, Nanjing International Marine Equipment Parts Co., Ltd. obtained a batch of 4,500 gas valve orders from Anqing Zhongchuan Diesel Engine Co., Ltd., which marked the cooperation and cooperation between Nanjing International and Anchai Company through the contact and efforts of Anchai Company for nearly two years. Finally, substantial progress has been made.