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ASTM A789 Saf 2205 Duplex Stainless Steel Tube S31803 25.4x2.11mm TIG Welded

Categories Duplex Stainless Steel Tube
Brand Name: SPEZILLA
Model Number: Seamless Tube
Certification: ISO9001:2008, PED 97/23/EC
Place of Origin: CHINA
MOQ: Negotiation
Price: Negotiation
Payment Terms: T/T or L/C
Supply Ability: 1000 TONS / MONTH
Delivery Time: 25 DAYS
Materials: S31803/2205
Product Name: Duplex Stainless Steel Tube
Standard: ASME SA789
O.D.: 5/8"-2"
W.T.: BWG18-BWG14
Length MAX: 12000MM Max.
Pipe Finish: TIG Welded
Type: Welded
Shape: Round
Surface: Bright Annealed
Application: Heat exchanger
Package: Wooden case
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    ASTM A789 Saf 2205 Duplex Stainless Steel Tube S31803 25.4x2.11mm TIG Welded

    ASTM A789 Saf 2205 duplex stainless steel S31803 Pipe 25.4x2.11mm

    2205 Duplex/Super Duplex Stainless Steel (1.4462,UNS S31803/UNS S32205)

    The yield strength is about twice that of austenitic stainless steels, thus allowing a designer to save weight and making the alloy more cost competitive when compared to 316L or 317L.

    Alloy 2205 (UNS S32305/S31803) is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness.
    Alloy 2205 provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic.

    Duplex 2205, also known as UNS S32205, is a nitrogen-enhanced stainless steel. Users choose Duplex 2205 for its excellent corrosion resistance along with its high strength. It is important to note that Duplex 2205, offers much higher levels of corrosion resistance than most other austenitic stainless steels. Other benefits include:

    • High resistance to pitting and crevice corrosion
    • Excellent in most caustic environments
    • Good weldability

    To be considered Duplex 2205, a stainless steel must have a chemical composition that includes:

    • Cr 21-23%
    • Ni 4.5-6.5%
    • Mn 2% Max
    • Mo 2.5-3.5%
    • N 0.08-0.20%
    • P 0.30% max
    • C 0.030% max

    Specifications of Duplex Stainless Steel Welded Tube

    1. Standard: ASTM ASME
    2. Grade: 630 / 631 / 2205 / 2507 / 17-4PH
    ASTM A789, ASTM A790, ASTM A450, ASTM A530,
    GB/T 14976, GB/T 14975, GB/T 13296, etc
    3. OD: 8mm-1000mm
    4. Wall thickness: 0.3mm-30mm
    5. Length: max.18000mm or as demand

    6. Surface finish: Polishing (180#,220#,240#,320#400#,600#), Hairline, acid pickled, etc.

    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.


    UNS S31803

    ASME SA-182 (F51), SA-240, SA-798, SA-790, SA-815
    ASTM A182 (F51),A240, A276, A479, A789, A790, A815, A928, A988
    SAE J405

    UNS S32205

    ASME SA-182 (F60), SA-240, SA-798, SA-790, SA-815
    ASTM A182 (F60), A240, A276, A479, A480, A798, A790, A815, A928, A988
    SAE J405


    • High resistance to chloride stress corrosion cracking
    • Chloride pitting and crevice corrosion resistance superior to 317L stainless
    • Good general corrosion resistance
    • High strength
    • Good sulfide stress corrosion resistance
    • Useful up to 600°F


    • Chemical process vessels, piping, and heat exchangers
    • FGD scrubber systems
    • Pulp mill digesters, bleach washers, chip presteaming vessels
    • Food process equipment
    • Oil field piping, heat exchangers


    Specifications (ASTM/ASME) Duplex Stainless Steel Pipe
    AlloyUNS DesignationMaterial
    2205S31803/S32205A 240/SA-240A 270A 790/SA-790
    A 789/SA-789A928/SA928

    Steel grade45% MgCl at 155oC40% CaCl2 at 100oC40% CaCl2 at 100oC, 0.9 x Rp0.225% NaCl, pH 1.5, 106oC25% NaCl, 106oC1500 ppm Cl- at 100oC
    2201ProbableNot probableNot probableNot probableNot probableNot probable
    2304ProbableNot probableNot probableNot probableNot probableNot probable
    2404ProbablePossibleNot probableNot probableNot probableNot probable
    2205ProbableNot probableNot probableNot probableNot probablePossible
    2507ProbableNot probableNot probableNot probableNot probableNot probable
    254 SMOProbableNot probableNot probableNot probableNot probableNot probable

    Buy ASTM A789 Saf 2205 Duplex Stainless Steel Tube S31803 25.4x2.11mm TIG Welded at wholesale prices
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