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SS 1.4462 Welded Steel Tube ASTM A928 UNS S31803 Super Duplex Stainless Steel Pipe

Categories Welded Stainless Steel Tube
Brand Name: SPEZILLA
Model Number: UNS S31803, S32205, S32750, S32760,1.4462
Certification: ISO9001:2008
Place of Origin: CHINA
MOQ: Negotiation
Price: Negotiation
Payment Terms: T/T or L/C
Supply Ability: 1000 TONS / MONTH
Delivery Time: 10 DAYS
Packaging Details: PLY-WOODEN CASE / BUNDLE WITH PLASTIC CAP
Specification: ASTM A928/A928M
Grade: UNS S31803, S32205, S32750, S32760,1.4462
Size Range: 8'' - 20''
Schedule: SCH 10S & 40S
Length: SRL, Fixed 6 Mtr
Type: Welded
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    SS 1.4462 Welded Steel Tube ASTM A928 UNS S31803 Super Duplex Stainless Steel Pipe

    SS 1.4462 Welded Steel Tube ASTM A928 UNS S31803 Super Duplex Stainless Steel Pipe


    Description:


    Duplex & Super Duplex Welded Stainless Steel Pipe appeared in the marketplace due to the need to combat the shortcomings of austenitic and ferritic steels. It was found that a mixture of these two materials resulted in higher strength, reduced weight, good weldability and increased resistance to stress corrosion cracking.


    Unlike similar steels, duplex also displays an improved resistance to localised corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. Due to its ferritic qualities, duplex steel also shows very good resistance to stress corrosion cracking when compared to standard austenitics. In some cases, the strength of duplex steel can be up to double that of the most commonly used grades of stainless steel.

    Another benefit of duplex steels is that because it has a lower nickel and molybdenum content than other austenitic stainless steels, it can prove to be a more cost effective option due to its lower alloy content.


    These benefits clearly show why Duplex steels have become popular in applications such as pressure vessels, cooling pipes and storage tanks.


    Duplex becomes brittle at extreme temperatures so its use is normally restricted to a maximum temperature of 300 degrees. Duplex also shows signs of embrittlement at –50 degrees.


    Advantages:


    1. Stronger than 300 series stainless steel which also brings weight advantages


    2. High resistance to pitting, crevice corrosion and stress corrosion cracking


    3. Higher heat conductivity and lower thermal expansion than austenitic steels


    Applications:


    1. Pipes for production and transportation of oil and gas


    2. Structural and mechanical components


    3. Heat exchangers


    4. Cooling pipes


    Specifications:


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

    Specifications (ASTM/ASME) Super Duplex Stainless Steel Pipe
    AlloyUNS DesignationMinimum Tensile Strength
    Minimum Yield
    Strength
    0.2% Offset
    Minimum Percent (%)
    Elongation in
    2 inches (50.8 mm)
    (psi)(MPa)(psi)(MPa)
    2507S32750116,00080080,00055015

    Chemical Compositions:


    Chemical Composition (%) Duplex Stainless Steel Pipe
    Alloy22052205
    UNS DesignationS31803S32205
    Carbon (C) max.0.0300.030
    Manganese (Mn) max.2.002.00
    Phosphorus (P) max.0.0300.030
    Sulfur (S) max.0.0200.020
    Silicon (Si) max.1.001.00
    Chromium (Cr)21.0 - 23.022.0 - 23.0
    Nickel (Ni)4.5 - 6.54.5 - 6.5
    Molybdenum (Mo)2.5 - 3.53.0 - 3.5
    Nitrogen (N)0.08 - 0.200.14 - 0.20
    Iron (Fe)BalanceBalance

    Chemical Composition (%) Super Duplex Stainless Steel Pipe
    Alloy2507
    UNS DesignationS32750
    Carbon (C) max.0.030
    Manganese (Mn) max.1.20
    Phosphorus (P) max.0.035
    Sulfur (S) max.0.020
    Silicon (Si) max.0.80
    Chromium (Cr)24.0 - 26.0
    Nickel (Ni)6.0 - 8.0
    Molybdenum (Mo)3.0 - 5.0
    Nitrogen (N)0.24 - 0.32
    Copper (Cu) max.0.50
    Iron (Fe)Balance

    Mechanical Property:


    Typical Physical & Mechanical Properties - Annealed Condition (Room Temperature)
    Duplex Stainless Steel Pipe
    AlloyUNS DesignationMinimum Tensile Strength
    Minimum Yield
    Strength
    0.2% Offset
    Minimum Percent (%)
    Elongation in
    2 inches (50.8 mm)
    (psi)(MPa)(psi)(MPa)
    2205S3180390,00062065,00045025
    2205S32205195,00065570,00048525
    2205S32205295,00065565,00045025
    Super Duplex Stainless Steel Pipe
    AlloyUNS DesignationMinimum Tensile Strength
    Minimum Yield
    Strength
    0.2% Offset
    Minimum Percent (%)
    Elongation in
    2 inches (50.8 m
    m)
    (psi)(MPa)(psi)(MPa)
    2507S32750116,00080080,00055015

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