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Quality ASTM A790 Duplex Stainless Steel Pipe Seamless Welded For Oil Gas Marine Applications factory
Quality ASTM A790 Duplex Stainless Steel Pipe Seamless Welded For Oil Gas Marine Applications factory

ASTM A790 Duplex Stainless Steel Pipe Seamless Welded For Oil Gas Marine Applications

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

Duplex Stainless Steel Pipe Seamless
Product Summary
ASTM A790 duplex stainless steel pipe is manufactured in accordance with the American standard for seamless and welded ferritic-austenitic duplex stainless steel pipe. This specification covers pipe intended for general corrosive service, with particular emphasis on applications requiring high ...

Product Details

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Duplex Stainless Steel Pipe Seamless

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Duplex Stainless Steel Pipe Welded

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ASTM A790 Stainless Steel Pipe
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

ASTM A790 duplex stainless steel pipe is manufactured in accordance with the American standard for seamless and welded ferritic-austenitic duplex stainless steel pipe. This specification covers pipe intended for general corrosive service, with particular emphasis on applications requiring high strength and excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

Our ASTM A790 duplex pipes are available in standard duplex grades (2205), super duplex grades (2507), and lean duplex grades (2304), offering solutions for a wide range of demanding environments.

Product Specifications
Parameter Details
Standard ASTM A790 / ASME SA790
Grades 2205 (UNS S31803, S32205), 2507 (UNS S32750), S32760, 2304 (UNS S32304)
Size (OD) 6.0 mm – 610 mm (1/8" – 24")
Wall Thickness Schedule 5S, 10S, 40S, 80S, 160, XXS (0.5 mm – 25.0 mm)
Length 3000 mm, 6000 mm, random lengths 6m – 12m (custom cut available)
Pipe Type Seamless (SMLS) or Welded (ERW / EFW / DSAW)
Surface Finish Mill finish, Pickled, Annealed
ASTM A790 Pipe Types
Type Description Size Range Best For
Seamless (SMLS) Extruded from solid billet, no weld seam Up to 610 mm OD High pressure, sour service, critical applications
Welded (ERW) Electric resistance welded Up to 610 mm OD General corrosive service, lower cost
Welded (EFW/DSAW) Fusion welded with filler Large diameters Large diameter, high volume applications
Chemical Composition by Grade (Reference %)
Element 2205 (S31803) 2205 (S32205) 2507 (S32750) 2304 (S32304)
Carbon (C) ≤ 0.030 0.030 0.030 0.030
Silicon (Si) ≤ 1.00 1.00 0.80 1.00
Manganese (Mn) ≤ 2.00 2.00 1.20 2.50
Phosphorus (P) ≤ 0.030 0.030 0.035 0.035
Sulfur (S) ≤ 0.020 0.020 0.020 0.020
Chromium (Cr) 21.0 – 23.0 22.0 – 23.0 24.0 – 26.0 21.5 – 24.5
Nickel (Ni) 4.5 – 6.5 4.5 – 6.5 6.0 – 8.0 3.0 – 5.5
Molybdenum (Mo) 2.5 – 3.5 3.0 – 3.5 3.0 – 5.0 0.05 – 0.60
Nitrogen (N) 0.08 – 0.20 0.14 – 0.20 0.24 – 0.32 0.05 – 0.20
Mechanical Properties by Grade
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HB)
2205 (S31803) ≥ 620 ≥ 450 ≥ 25 ≤ 290
2205 (S32205) ≥ 620 ≥ 450 ≥ 25 ≤ 290
2507 (S32750) ≥ 730 ≥ 550 ≥ 20 ≤ 310
2304 (S32304) ≥ 600 ≥ 400 ≥ 25 ≤ 290

Note: The values above are minimum requirements per ASTM A790. Please refer to the mill test certificate for actual data.

Key Features of ASTM A790 Duplex Pipe
  • High Strength – Yield strength approximately twice that of austenitic grades
  • Excellent Pitting Resistance – PREN values ranging from 25 to 41+
  • Stress Corrosion Cracking Resistance – Resists chloride SCC
  • Good Weldability – Suitable for welding with proper procedures
  • Cost Efficiency – Allows for thinner wall sections than austenitic grades
  • Full Traceability – Mill test certificates available per EN 10204 3.1/3.2
PREN (Pitting Resistance Equivalent Number) by Grade
Grade PREN Pitting Resistance
2304 (Lean Duplex) 24 – 26 Good
2205 (Standard Duplex) 33 – 35 Excellent
2507 (Super Duplex) 41 – 45 Superior

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

Applications by Grade
Grade Typical Applications
2304 (Lean Duplex) Cost effective alternative to 316L, fresh water, food processing, structural
2205 (Standard Duplex) Oil and gas flow lines, chemical processing, marine, heat exchangers, desalination
2507 (Super Duplex) Deepwater subsea, seawater cooling, sour service (H₂S), FGD systems, offshore
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Need duplex pipe to ASTM A790 specifications? We are ready to supply.

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