Home / Products / Stainless Steel Pipe / Corrosion Resistant Super Duplex Steel Pipe 6.0mm - 1829mm OD ASTM A790 A789 A928
Quality Corrosion Resistant Super Duplex Steel Pipe 6.0mm - 1829mm OD ASTM A790 A789 A928 factory
Quality Corrosion Resistant Super Duplex Steel Pipe 6.0mm - 1829mm OD ASTM A790 A789 A928 factory

Corrosion Resistant Super Duplex Steel Pipe 6.0mm - 1829mm OD ASTM A790 A789 A928

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
Tags

Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

Corrosion Resistant Super Duplex Steel Pipe
Product Summary
Corrosion resistant duplex steel pipe is specifically engineered for service in aggressive environments where standard stainless steels such as 304 and 316 are prone to failure. The unique two-phase microstructure (austenite + ferrite) combined with elevated levels of chromium, molybdenum, and ...

Product Details

Highlight:

Corrosion Resistant Super Duplex Steel Pipe

,

Super Duplex Steel Pipe 6.0mm

,

Duplex Steel Pipe ASTM A790
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

Corrosion resistant duplex steel pipe is specifically engineered for service in aggressive environments where standard stainless steels such as 304 and 316 are prone to failure. The unique two-phase microstructure (austenite + ferrite) combined with elevated levels of chromium, molybdenum, and nitrogen provides exceptional resistance to a wide range of corrosive attack mechanisms.

Our duplex steel pipes offer outstanding protection against pitting, crevice corrosion, stress corrosion cracking (SCC), general corrosion, and erosion-corrosion, making them the preferred choice for chemical, marine, oil and gas, and desalination applications.

Product Specifications
Parameter Details
Standard ASTM A790, A789, A928, EN 10216-5, EN 10217-7, NACE MR0175
Grades 2205 (UNS S31803, S32205), 2507 (UNS S32750), 2304 (UNS S32304), S32760
Size (OD) 6.0 mm – 1829 mm (1/8" – 72")
Wall Thickness 0.5 mm – 50.0 mm
Length 3000 mm, 6000 mm, random lengths, custom cut
Process Seamless or Welded (ERW, EFW, DSAW)
Surface Finish Annealed and pickled, Bright annealed, Mechanically polished
Corrosion Resistance Mechanisms
Corrosion Type Duplex Steel Resistance Mechanism
Pitting Excellent to Superior High Cr, Mo, and N content (PREN 25-45+)
Crevice Corrosion Excellent to Superior Same alloying elements protect shielded areas
Stress Corrosion Cracking (SCC) Excellent Ferrite phase arrests crack propagation
General Corrosion Good to Excellent High Cr content forms stable passive film
Erosion-Corrosion Good High hardness and strength resist wear
Intergranular Corrosion Excellent Low carbon content prevents sensitization
Galvanic Corrosion Good Compatible with austenitic grades when coupled
Hydrogen Induced Cracking (HIC) Good (with NACE) Suitable for sour service with certification
Chemical Composition by Grade (Reference %)
Element 2205 (S32205) 2507 (S32750) 2304 (S32304) S32760
Carbon (C) ≤ 0.030 0.030 0.030 0.030
Chromium (Cr) 22.0 – 23.0 24.0 – 26.0 21.5 – 24.5 24.0 – 26.0
Nickel (Ni) 4.5 – 6.5 6.0 – 8.0 3.0 – 5.5 6.0 – 8.0
Molybdenum (Mo) 3.0 – 3.5 3.0 – 5.0 0.05 – 0.60 3.0 – 4.0
Nitrogen (N) 0.14 – 0.20 0.24 – 0.32 0.05 – 0.20 0.20 – 0.30
Copper (Cu) — ≤ 0.50 — 0.50 – 1.00
Tungsten (W) — — — 0.50 – 1.00
PREN (Pitting Resistance Equivalent Number) by Grade
Grade PREN Corrosion Resistance Level
316L (Austenitic - for reference) 23 – 25 Standard
2304 (Lean Duplex) 24 – 26 Good (alternative to 316L)
2205 (Standard Duplex) 33 – 35 Excellent
S32760 (Super Duplex) 40 – 42 Superior
2507 (Super Duplex) 41 – 45 Superior

PREN = %Cr + 3.3(%Mo) + 16(%N). Higher PREN indicates better pitting resistance.

Mechanical Properties
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HB)
2304 ≥ 600 ≥ 400 ≥ 25 ≤ 290
2205 ≥ 620 ≥ 450 ≥ 25 ≤ 290
2507 ≥ 730 ≥ 550 ≥ 20 ≤ 310
S32760 ≥ 730 ≥ 550 ≥ 25 ≤ 310

Note: The values above are for reference only. Please refer to the mill test certificate for actual data.

Key Corrosion Resistance Features
  • High Chromium (21-26%) – Forms stable passive film for general corrosion resistance
  • Molybdenum (up to 5%) – Provides exceptional pitting and crevice corrosion protection
  • Nitrogen (0.05-0.32%) – Stabilizes austenite and enhances pitting resistance
  • Low Carbon (≤0.03%) – Prevents intergranular corrosion after welding
  • Balanced Microstructure – Ferrite phase stops SCC crack propagation
  • High PREN – Quantitative measure of pitting resistance for material selection
Corrosion Resistance by Environment
Environment 304/316 2304 2205 2507
Fresh Water Good Excellent Excellent Excellent
Tap Water / Potable Water Good Excellent Excellent Excellent
Brackish Water Fair Good Excellent Excellent
Seawater (Splash Zone) Poor Fair Good Excellent
Seawater (Full Immersion) Not recommended Limited Good Excellent
Chloride Solutions (<1000 ppm) Fair Good Excellent Excellent
Chloride Solutions (>1000 ppm) Poor Fair Good Excellent
Sour Service (H₂S) Not recommended Not recommended Good (NACE) Good (NACE)
Acidic Environments Poor Fair Good Good
Caustic Environments Good Good Good Good
Applications by Corrosion Challenge
Corrosion Challenge Recommended Grade Typical Application
Seawater Pitting 2507 Seawater cooling pipes, offshore platforms
Chloride SCC 2205 or 2507 Chemical plants, heat exchangers
Crevice Corrosion 2507 Flanges, gasketed joints, submerged service
Sour Gas (H₂S) 2205 (NACE) Oil and gas flow lines, downhole tubing
High Chloride + Low pH 2507 Desalination, acid chloride service
Erosion from Solids 2205 Slurry lines, mining applications
High Temperature Corrosion 2507 FGD systems, geothermal wells
NACE MR0175 / ISO 15156 Compliance

For sour service applications containing hydrogen sulfide (H₂S), duplex steel pipe can be supplied to NACE MR0175.

Requirement 2205 2507
Maximum Hardness (HRC) ≤ 28 ≤ 28
SSC Resistance Yes Yes
HIC Resistance Yes Yes
Sour Service Limit (H₂S partial pressure) Up to 10 psi (70 kPa) Up to 10 psi (70 kPa)
Certification NACE MR0175 3.1 NACE MR0175 3.1
Contact Us

Need a pipe that can handle your most aggressive corrosive environment? We have the solution

Related Products
  • Quality Precision 301 304 316 430 Cold Rolled Stainless Steel Strip 2B BA No.4 Finish factory

    Precision 301 304 316 430 Cold Rolled Stainless Steel Strip 2B BA No.4 Finish
    Precision cold rolled stainless steel strip is a narrow, thin-gauge stainless steel product manufactured to significantly tighter thickness and width tolerances than standard cold-rolled sheet. Unlike standard sheet (typically 1000mm or 1219mm wide), precision strip is produced in narrow widths — usually less than 600mm — and thin gauges from 0.05mm up to 3.0mm. The key differentiator is the tolerance : the precision strip holds thickness variations to as low as ±0.005mm,
  • Quality High Precision 304 Stainless Steel Seamless Pipe Cold Rolled Corrosion Resistance factory

    High Precision 304 Stainless Steel Seamless Pipe Cold Rolled Corrosion Resistance
    304 Stainless Steel Seamless Pipe The 304 stainless steel seamless pipe is a globally recognized standard grade in the stainless steel family. With a chemical composition of 18% chromium and 8% nickel, it offers excellent corrosion resistance, high toughness, and outstanding formability. Manufactured using precision seamless cold-rolling technology, this pipe delivers a superior surface finish, tight dimensional tolerances, and consistent mechanical properties — making it the
  • Quality UNS N06022 Hastelloy C-22 Alloy Corrosion Resistant ASTM B622 factory

    UNS N06022 Hastelloy C-22 Alloy Corrosion Resistant ASTM B622
    UNS N06022 is a nickel-chromium-molybdenum alloy renowned for its exceptional resistance to both oxidizing and reducing corrosive media. With a higher chromium content than C-276, plus controlled additions of tungsten, this alloy offers superior resistance to pitting, crevice corrosion, and stress-corrosion cracking in aggressive environments. UNS N06022 provides outstanding performance in wet chlorine, hydrochloric acid, sulfuric acid, and mixed acid solutions where many
  • Quality Austenitic Corrosion Resistant Hastelloy C-22 Nickel Alloy For Harsh Chemical Processing factory

    Austenitic Corrosion Resistant Hastelloy C-22 Nickel Alloy For Harsh Chemical Processing
    Hastelloy C-22: Ultimate Corrosion-Resistant Nickel Alloy Hastelloy C-22 is a fully austenitic, advanced corrosion-resistant nickel-chromium-molybdenum-tungsten alloy. It offers outstanding resistance to both uniform corrosion in oxidizing media and localized attack (pitting, crevice corrosion) in reducing environments. Unlike standard alloys, C-22 provides exceptional resistance to stress corrosion cracking (SCC), intergranular attack, and weld heat-affected zone (HAZ)

Send An Inquiry