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Duplex / Super Duplex

Product Range

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For all Buttweld Pipe Fittings Details: Size, Dimensions, Pressure Rating, Weight Chart, Dimensional Tolerances

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Materials & Grades

Duplex and Super Duplex Steel offer exceptional strength and corrosion resistance, making them a top choice for demanding industrial applications. Creative Piping Solutions specializes in manufacturing high-quality Duplex and Super Duplex Steel buttweld fittings, forged fittings, and flanges designed to withstand harsh environments, including seawater, brine, and chemical exposure. Buttweld fittings such as elbows, tees, reducers, and caps in Duplex Steel (UNS S31803, S32205) and Super Duplex Steel (UNS S32750, S32760) are available in sizes ranging from ½” to 48”, adhering to ASME B16.9 standards. Forged fittings like socket welds and threaded fittings are offered in pressure classes 3000#, 6000#, and 9000#, complying with ASME B16.11 standards. Flanges, including slip-on, weld-neck, and blind, are produced to ASME B16.5 and B16.47 specifications, catering to high-pressure and high-temperature applications.

Our Duplex and Super Duplex products exhibit superior mechanical properties, including high tensile strength and excellent impact toughness, while offering outstanding resistance to pitting, crevice, and stress corrosion cracking. These materials are ideal for industries such as oil and gas, petrochemical, and offshore marine sectors, where durability and reliability are critical. Customization is available to meet specific client requirements, ensuring our fittings and flanges seamlessly integrate into any project.

Duplex Steel Specifications

Specification Description
Specifications ASTM A815, ASME SA815, ASTM A182, ASME SA182
Size Range
  • Buttweld: 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
  • Forged: 1/8” NB to 4” NB (Socketweld & Screwed-Threaded)
  • Flange: 1/2″ (15 NB) to 48″ (1200NB)
Manufacturing Standards
  • ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 (Buttweld)
  • ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 (Forged)
  • ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN (Flanges)
Buttweld Thickness 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75.
Forged Class 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS.
Flange Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Grades
  • UNS S31803 (2205), UNS S32205, UNS S32550, UNS S32750.
  • UNS S32760 (2507), UNS S32520, UNS S32701.

Duplex Steel Products

Buttweld Fittings

Forged Fittings

Flanges

Pipe Spools

Duplex / Super Duplex Steel

  • Equivalent Grades

  • Chemical Composition

  • Mechanical Properties

Duplex Grade UNS No. EN/ISO Standard Other Equivalent Grades
2205 (Duplex) S31803 1.4462 ASTM A182 F51, ASTM A240 2205
2507 (Super Duplex) S32750 1.4410 ASTM A182 F53, ASTM A240 2507
2501 (Super Duplex) S32550 1.4501 ASTM A182 F60, ASTM A240 2501
32760 (Super Duplex) S32760 1.4501 ASTM A182 F53, ASTM A240 32760
32701 (Super Duplex) S32701 1.4410 ASTM A182 F61, ASTM A240 32701
Grade C Cr Ni Mo Mn Si P S N
2205 (Duplex) ≤0.03 22.0–23.0% 4.5–6.5% 3.0–4.0% 1.5–2.5% ≤1.0% ≤0.03% ≤0.01% 0.08–0.2%
2507 (Super Duplex) ≤0.03 25.0–26.0% 6.0–8.0% 3.0–5.0% 1.5–2.5% ≤1.0% ≤0.03% ≤0.01% 0.18–0.30%
2501 (Super Duplex) ≤0.03 24.0–26.0% 6.5–7.5% 3.0–4.0% 1.5–2.5% ≤1.0% ≤0.03% ≤0.01% 0.10–0.20%
32760 (Super Duplex) ≤0.03 25.0–26.0% 6.5–8.5% 3.0–4.0% 1.5–2.5% ≤1.0% ≤0.03% ≤0.01% 0.18–0.30%
32701 (Super Duplex) ≤0.03 25.0–26.0% 6.0–8.0% 3.0–4.0% 1.5–2.5% ≤1.0% ≤0.03% ≤0.01% 0.18–0.30%
  • The chemical composition is for Duplex and Super Duplex Steel grades commonly used in Buttweld fittings, Forged fittings, and Flanges.
  • These steels typically contain a high level of Chromium (Cr) and Molybdenum (Mo) to offer excellent resistance to corrosion, particularly in harsh environments like chloride-bearing solutions.
  • Nitrogen (N) is added to improve the mechanical properties and corrosion resistance.
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HBW)
2205 (Duplex) 620–850 450 25 ≤290
2507 (Super Duplex) 750–1000 550 25 ≤310
2501 (Super Duplex) 750–1000 550 20–25 ≤310
32760 (Super Duplex) 750–1000 550 25 ≤310
32750 (Super Duplex) 800–1000 550 25 ≤310
  • The mechanical properties are highly dependent on the grade and the manufacturing process.
  • Tensile Strength (MPa): The maximum stress the material can withstand while being stretched or pulled.
  • Yield Strength (MPa): The stress at which the material begins to deform plastically.
  • Elongation (%): Measures ductility, showing how much a material can stretch before breaking.
  • Hardness (HBW): Resistance to deformation or scratching, measured using the Brinell scale.

Application Industries

  • Oil and Gas Industry
  • Petrochemical Industry
  • Power Generation
  • Chemical Industry
  • Water Treatment and Desalination
  • Pharmaceutical Industry
  • Food and Beverage Industry
  • Mining and Mineral Processing
  • Shipbuilding and Marine Applications
  • Aerospace and Defense
  • Construction and Infrastructure
  • Automotive and Transportation