Home / Products / Stainless Steel Pipe / 2205 Stainless Steel Pipe ASTM A790 Duplex Seamless Tube UNS S31803 / S32205 for Offshore Chemical
Quality 2205 Stainless Steel Pipe ASTM A790 Duplex Seamless Tube UNS S31803 / S32205 for Offshore Chemical factory
Quality 2205 Stainless Steel Pipe ASTM A790 Duplex Seamless Tube UNS S31803 / S32205 for Offshore Chemical factory

2205 Stainless Steel Pipe ASTM A790 Duplex Seamless Tube UNS S31803 / S32205 for Offshore Chemical

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
Product Summary
2205 Stainless Steel Pipe - UNS S31803 S32205 Seamless Tubing The 2205 duplex stainless steel pipe combines the best properties of austenitic and ferritic stainless steels. It provides excellent resistance to chloride stress corrosion cracking (SCC), high thermal conductivity, and a low coefficient ...

Product Details

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
2205 Stainless Steel Pipe - UNS S31803 S32205 Seamless Tubing
The 2205 duplex stainless steel pipe combines the best properties of austenitic and ferritic stainless steels. It provides excellent resistance to chloride stress corrosion cracking (SCC), high thermal conductivity, and a low coefficient of thermal expansion.
Key Advantages vs Standard Austenitic Grades
  • Higher strength - allows for reduced wall thickness and lighter weight structures
  • Superior corrosion resistance - especially in chloride-containing environments
  • Better cost efficiency - reduced material weight lowers overall project costs
At ZhongCheng, we supply 2205 stainless steel pipes in both seamless and welded (ERW/EFW) executions, manufactured according to ASTM A789 / A790 standards. Our duplex pipes are widely used in offshore platforms, heat exchangers, chemical tankers, and desalination plants.
Key Selling Points
  • Dual-phase microstructure - high strength + good ductility
  • Outstanding SCC resistance - ideal for chloride-rich environments
  • High yield strength (≥450 MPa) - allows lightweight design
  • Good weldability - with proper filler metal and heat input control
  • Wide temperature range - from cryogenic to elevated temperatures
Specifications
Parameter Details
Standard ASTM A789 / A790, ASME SA789 / SA790, ISO 13628
Grade UNS S31803, UNS S32205, 1.4462
Type Seamless / Welded (ERW / EFW / TIG)
Outer Diameter 6 mm - 1219 mm (1/8″ - 48″)
Wall Thickness 0.5 mm - 50 mm (SCH 10S - SCH 160)
Length 3 m, 4 m, 6 m, or custom (max. 12 m)
Surface Finish Pickled, Annealed, Bright Annealed, Polished
Ends Plain ends, Beveled ends, Threaded, Grooved
Delivery Condition Solution annealed + water quenched
Chemical Composition
Compliant with ASTM A789 / A790 for UNS S32205.
Element Content (%) - UNS S31803 Content (%) - UNS S32205
Carbon (C) ≤ 0.030 ≤ 0.030
Manganese (Mn) ≤ 2.00 ≤ 2.00
Silicon (Si) ≤ 1.00 ≤ 1.00
Phosphorus (P) ≤ 0.030 ≤ 0.030
Sulfur (S) ≤ 0.020 ≤ 0.020
Chromium (Cr) 21.0 - 23.0 22.0 - 23.0
Nickel (Ni) 4.50 - 6.50 4.50 - 6.50
Molybdenum (Mo) 2.50 - 3.50 3.00 - 3.50
Nitrogen (N) 0.08 - 0.20 0.14 - 0.20
Iron (Fe) Balance Balance
Note: UNS S32205 has tighter control on Cr, Mo, and N, offering enhanced corrosion resistance compared to S31803.
Mechanical Properties
Property Value (ASTM A790)
Tensile Strength ≥ 620 MPa (90 ksi)
Yield Strength (0.2% offset) ≥ 450 MPa (65 ksi)
Elongation (in 2″) ≥ 25%
Hardness ≤ 290 HB (≤ 30 HRC)
Density 7.8 g/cm³
Modulus of Elasticity 200 GPa (29,000 ksi)
Comparison vs 316L Stainless Steel
Property 2205 Duplex 316L Austenitic
Yield Strength ≥ 450 MPa ≥ 170 MPa
Tensile Strength ≥ 620 MPa ≥ 485 MPa
Corrosion Resistance (PREN)* ≥ 35 ≈ 25
*PREN = Pitting Resistance Equivalent Number (Cr% + 3.3×Mo% + 16×N%)
Manufacturing Process
  1. Raw Material Inspection: Chemical composition verification via spectrometer.
  2. Pipe Forming:
    • Seamless: Rotary piercing of billet + cold drawing / cold rolling
    • Welded: Coil slitting + forming + TIG/Laser welding
  3. Welding (for welded pipe): Automated GTAW (TIG) with Ar + N₂ shielding to maintain duplex phase balance.
  4. Solution Annealing: Heat treatment at 1040 - 1120°C followed by water quenching to restore ferrite/austenite balance.
  5. Pickling & Passivation: Removal of oxide scale and enhancement of corrosion resistance.
  6. Non-Destructive Testing (NDT):
    • Eddy current testing (ECT)
    • Ultrasonic testing (UT)
    • Hydrostatic testing
  7. Dimensional Inspection: OD, WT, and length tolerance verification.
  8. Marking & Packaging: Stencil marking per ASTM standard + wooden crate packaging.
Critical Note: Proper solution annealing and rapid quenching are essential for 2205 duplex pipe to prevent harmful intermetallic phases (sigma phase) that reduce corrosion resistance.
Applications
Thanks to its high strength and excellent chloride corrosion resistance, 2205 stainless steel pipe is widely used in:
Industry Specific Applications
Oil & Gas Offshore platforms, subsea pipelines, flow lines, risers
Chemical Processing Heat exchangers, pressure vessels, reactor pipes
Marine Engineering Seawater cooling systems, desalination plants, and shipbuilding
Pulp & Paper Digester vessels, bleaching systems
Food & Beverage High-chloride processing equipment
Construction Bridges, tunnels, and structural components in coastal areas
Pollution Control Flue gas desulfurization (FGD) systems
Common Use Cases
  • Seawater reverse osmosis (SWRO) piping
  • Chemical tanker cargo lines
  • Geothermal well casings
  • Hydropower penstocks
Frequently Asked Questions (FAQ)
Q1: What is the difference between 2205 and 316L stainless steel pipe?
A: 2205 duplex pipe offers approximately 2.5x higher yield strength and significantly better resistance to chloride stress corrosion cracking (SCC) compared to 316L. However, 316L is more ductile and easier to fabricate for simple applications.
Q2: Is 2205 stainless steel pipe magnetic?
A: Yes. Due to its ferrite phase (≈50%), 2205 duplex pipe is magnetic, unlike fully austenitic grades like 304 or 316.
Q3: Can 2205 duplex pipe be welded?
A: Yes, but it requires proper procedures. Use 2209 duplex filler metal, control interpass temperature (≤150°C), and maintain heat input (0.5 - 2.5 kJ/mm). Post-weld heat treatment is generally not required.
Q4: What is the difference between UNS S31803 and UNS S32205?
A: S32205 is a refined version with higher minimum contents of Cr (22.0% vs 21.0%), Mo (3.0% vs 2.5%), and N (0.14% vs 0.08%), providing enhanced corrosion resistance. Most modern specifications prefer S32205.
Q5: Does 2205 pipe require solution annealing after welding?
A: For most applications, no. As long as welding is performed with proper heat input and filler metal, the pipe can be used as-welded. For severely corrosive services, full solution annealing + water quenching may be required.
Q6: What is the PREN value of 2205?
A: The Pitting Resistance Equivalent Number (PREN) for 2205 is typically ≥ 35, compared to ≈25 for 316L. Higher PREN indicates better resistance to pitting corrosion.
Q7: Do you provide Mill Test Certificates (MTCs)?
A: Yes. All our 2205 stainless steel pipes are supplied with EN 10204 Type 3.1 or 3.2 Mill Test Certificates, including chemical composition, mechanical properties, and NDT reports.
Q8: What is the maximum operating temperature for 2205 pipe?
A: 2205 duplex pipe is suitable for continuous service from -50 °C to 300°C. Above 300°C, embrittlement may occur due to intermetallic phase formation.
Why Choose Our 2205 Stainless Steel Pipe?
Advantage Description
Strict Quality Control 100% NDT testing (ET/UT) + hydrostatic testing
Full Traceability Heat number stamped on each pipe + MTC provided
Competitive Pricing Direct factory pricing - no middlemen
Short Lead Times Large inventory of standard sizes ready to ship
Technical Support Free welding and fabrication consultation
Request a Free Quote for 2205 Stainless Steel Pipe
Send us your required: OD, Wall Thickness, Length, Quantity, and Standard (ASTM A789/A790).
We will reply within 12 hours with the best price and MTC sample.
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