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Corrosion Resistant Duplex Stainless Steel Round Bar S32900 S31803 S32205

Categories duplex stainless steel
Place of Origin: shenzhen, China
Brand Name: GSf
Certification: SGS
Model Number: S32900 S31803 S32205
MOQ: 500kg
Packaging Details: export standard package
Delivery Time: 7-30 days after deposit
Payment Terms: T/T: 30% deposit and balance before shipment
Supply Ability: 1000ton/month
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    Corrosion Resistant Duplex Stainless Steel Round Bar S32900 S31803 S32205

    Duplex Stainless Steel Round Bar S32900 S31803 S32205 Corrosion Resistant


    Specifications


    Duplex Round Bar S32900, S31803, S32205


    Duplex Round Bar S32900 Duplex & Super Duplex Steel:


    Duplex alloys were originally created to combat corrosion problems caused by chloride-bearing cooling waters and other aggressive chemical process fluids. Called Duplex because of its mixed micro-structure with about equal proportions of ferrite and austenite, duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. The chemical composition based on high contents of Cr and Mo, improves intergranular and pitting corrosion resistance, respectively. Additions of nitrogen can promote structural hardening by interstitial solid solution mechanism, which raises the yield strength and ultimate strength values without impairing toughness. Moreover, the two-phase micro-structure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventional stainless steels.


    Composition of Duplex Stainless Steels :

    The table lists the duplex stainless steels covered in ASTM specifications for plate, sheet, and bar products.


    UNS Number
    Duplex Grades

    Typeb

    C

    Mn

    P

    S

    Si

    Cr

    Ni

    Mo

    N

    Cu

    S31200

    -

    0.030

    2.00

    0.045

    0.030

    1.00

    24.0-26.0

    5.5-6.5

    1.20-2.00

    0.14-0.20

    -

    S31260

    -

    0.03

    1.00

    0.030

    0.030

    0.75

    24.0-26.0

    5.5-7.5

    2.5-3.5

    0.10-0.20

    0.20-0.80

    S31803

    -

    0.030

    2.00

    0.030

    0.020

    1.00

    21.0-23.0

    4.5-6.5

    2.5-3.5

    0.08-0.20

    -

    S32001

    -

    0.030

    4.0-6.0

    0.040

    0.030

    1.00

    22.0-23.0

    1.00-3.00

    0.60

    0.05-0.17

    1.00

    S32205

    2205

    0.030

    2.00

    0.030

    0.020

    1.00

    19.5-21.5

    4.5-6.5


    0.14-0.20

    -

    S32304

    2304

    0.030

    2.50

    2.50

    0.030

    1.00

    21.5-24.5

    3.0-5.5

    0.05-0.60

    0.05-0.20

    0.05-0.60

    S32520

    -

    0.030

    1.50

    0.035

    0.035

    0.80

    24.0-26.0

    5.5-8.0

    3.0-4.0

    0.20-0.35

    0.50-2.00

    S32550

    255

    0.04

    1.50

    0.040

    0.030

    1.00

    24.0-27.0

    4.5-6.5

    2.9-3.9

    0.10-0.25

    1.5-2.5

    S32750

    2507

    0.030

    1.20

    0.035

    0.020

    0.80

    24.0-26.0

    6.0-8.0

    3.0-5.0

    0.24-0.32

    0.50

    S32760

    -

    0.030

    1.00

    0.030

    0.010

    1.00

    24.0-26.0

    6.0-8.0

    3.0-4.0

    0.20-0.30

    0.50-1.00

    S32900

    329 d

    0.06

    1.00

    0.040

    0.030

    0.75

    23.0-28.0

    2.5-5.0

    1.0-2.0


    -

    S32950

    -

    0.03

    2.00

    0.035

    -


    -


    -


    -


    BENEFITS


    High strength


    High resistance to pitting, crevice corrosion resistance.


    High resistance to stress corrosion cracking, corrosion fatigue and erosion,


    Good sulfide stress corrosion resistance,


    Low thermal expansion and higher heat conductivity than austenitic steels,


    Good workability and weldability,


    High energy absorption.



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