Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.
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Chemical Composition
| Chemical Composition(%) | Â | Â | Â | Â | Â | Â | Â | Â | Â |
| C | Mn | Si | Cr | Ni | P | S | Mo | N | - |
| Max 0.03 | Max 2.0 | Max 1.0 | 21.0-23.0 | 4.5-6.5 | Max 0.03 | Max 0.015 | 2.9-3.5 | 0.14-0.2 | - |
Mechanical properties of 2205 grade stainless steels
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| Grade | Tensile Str (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| 2205 | 621 | 448 | 25 | 31 max | 293 max |
Applications:
Chemical processing, transport and storage - pressure vessels, tanks, piping, and heat exchangers
Oil and gas exploration and processing equipment - piping, tubing, and heat exchangers
Marine and other high chloride environments
Effluent scrubbing systems
Pulp and paper industry - digesters, bleaching equipment, and stock-handling systems
Cargo tanks for ships and trucks
Food processing equipment
Biofuels plants
Contact Shanghai Jingteng metal products Co., Ltd with your enquiries
Our Website: http://www.chinajtmetal.com/
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DUPLEX STAINLESS STEEL
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:
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
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.
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
Duplex Steel Welded Pipe,Stainless Steel Welded Pipe,Duplex Steel Butt Welded Pipe
YUHONG GROUP CO.,LIMITED , https://www.jessro-pipefittings.com