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Duplex 2205 Fastener
    发布时间: 2015-12-15 10:06    
Duplex 2205 Fastener

Duplex 2205 Fastener

Duplex 2205 is a nitrogen enhanced duplex stainless steelthat was developed to combat common corrosion problems encountered with the 300 series stainless steels. "Duplex" describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, 2205 contains approximately 40-50% ferrite. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex family of stainless steels.
The advantage of a duplex structure is that it combines the favorable qualities of a ferritic  alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).
Usage of 2205 Duplex stainless steel should be limited to temperatures below 600° F.  Extended elevated temperature exposure can embrittle 2205 stainless.
2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chloride. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.
The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.


Chemical Composition


Nickel ...............................................................................4.5-6.5
Chromium........................................................................22.0-23.0
Molybdenum....................................................................3.0-3.5
Manganese......................................................................2.0 max.
Sulfur.................................................................................0.02max.
Silicon...............................................................................1.0max.
Carbon..............................................................................0.03max.
Phosphorus.....................................................................0.03max.
Iron.....................................................................................Balance



·Mark: TM
·Material: Duplex 2205(UNS S31803)
·Finish: Polishing
·Certificate: ISO9001:2008, SGS
·Packaging Detail: 20-25kgs per carton, 36-48 cartons per pallet or according to  customer's  requirement.
·Customer Service: 24-hours standby, Critical listening your every suggestion and feedback ASAP.

TOMORROW manufacturing capabilities allow us to make a wide variety of exotic alloy fasteners such as Hex Bolt, Hex Nut, Allen Bolt, Plain Washer, Thread Stud etc.
Our special materials are Hastelloy C-276(UNS N10276), Hastelloy C-22(UNS N06022), Hastelloy B3(UNS N010675), Incoloy 825(UNS N08825), Incoloy 925(UNS N09925), Incoloy 926(UNS N08926), Incoloy 800HT(UNS N08811), Inconel 600(UNS N06600), Inconel 625(UNS N06625), Inconel X-750(UNS N07750), Inconel 725(UNS N07725), Inconel 718(UNS N07718), Monel 400(UNS N04400), Monel404, Monel K500(UNS N05500), Duplex 2205(UNS S31803), Super Duplex 2507(UNS32750), Super Austentic 904L(UNS N08904), Super Austentic F44(UNS S31254), Titanium, Nimonic 80A, GH113, GH3039, GH2032, Precipitation-hardening 17-4PH, Super Austentic 20Cb-3, Super Austentic 6XN, Austentic 347H(UNS S34709) etc. Our hot forged fastener size range is from M5-M100.

Our goal today, as always, is to develop innovative high quality exotic alloy fasteners that are durable, save time and money. 

Customer service is just as important to us as quality. 
Our representatives will assist you in analyzing your requirements and selecting the system best suited to your needs. We inventory an extensive line of standard products and will economically produce special systems to meet your design requirements. We are people who deliver what we say, when we say. 


TOMORROW...Dependability in design, engineering, manufacturing and service.


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86-523-83788163