Duplex & Super Duplex Stainless Steel – High Strength & Corrosion Resistance

Trusted Supplier of Duplex and Super Duplex Stainless Steel Products for Demanding Application

Why Choose Duplex Stainless Steel?

Duplex and Super Duplex stainless steels combine the strength of ferritic steels with the corrosion resistance of austenitic grades. They offer high mechanical strength, stress corrosion cracking resistance, and excellent durability in harsh environments.

At Ganesh Metals, we stock and supply a complete range of Duplex and Super Duplex grades in multiple product forms – meeting global standards and customer-specific requirements.

Title: Duplex & Super Duplex Steel Applications: Offshore, Chemical, Oil & Gas

Meta Description: Explore the top applications for Duplex 2205 & Super Duplex 2507 stainless steel. Ideal for offshore marine equipment, desalination plants, chemical processing, and oil & gas systems requiring superior strength and corrosion resistance.

Key Applications for Duplex and Super Duplex Stainless Steels

Duplex and Super Duplex stainless steels are the materials of choice for engineers facing the dual challenges of extreme corrosion and demanding mechanical stresses. Their unique combination of high strength and excellent corrosion resistance makes them perfect for these critical industries.

Offshore & Marine Engineering

• Key Applications: Subsea pipelines, manifolds, risers, mooring systems, propeller shafts, and seawater cooling systems.

• Why Duplex? Their exceptional resistance to chloride pitting and stress corrosion cracking (SCC), combined with double the yield strength of standard 316 stainless, allows for lighter, stronger, and more durable structures that withstand harsh seawater environments.

Desalination & Water Treatment Plants

• Key Applications: High-pressure reverse osmosis (RO) tubing, brine heaters, evaporator shells, water chambers, and pump housings.

• Why Duplex? They offer outstanding resistance to pitting and crevice corrosion in chloride-laden waters, making them essential for thermal desalination (MED/MSF) and RO plant critical components, ensuring long service life and reduced maintenance.

Oil & Gas Production

• Key Applications: Downhole tubing, flowlines, separators, pressure vessels, Christmas trees, and components for sour gas (H₂S) service.

• Why Duplex? Perfect for demanding upstream applications, these grades provide excellent resistance to sulfide stress cracking (SSC) and general corrosion in aggressive, high-pressure downhole environments, as specified in NACE MR0175/ISO 15156.

Chemical & Petrochemical Processing

• Key Applications: Heat exchangers, pressure vessels, reactors, distillation columns, and piping systems handling acidic and chloride-containing process streams.

• Why Duplex? They bridge the gap between standard austenitics and high-end nickel alloys, providing cost-effective resistance to a wide range of acids, including sulfuric and phosphoric acid, and organic acids.

Pulp & Paper Manufacturing

• Key Applications: Digester preheaters, blow tanks, bleach washers, stock handling systems, and white liquor tanks.

• Why Duplex? Their superior resistance to corrosive pulping liquors (e.g., chlorides, acids, and oxidizing bleaches) and erosion-corrosion extends equipment life in the most aggressive areas of a mill.

Alternative to Higher-Cost Alloys

• A major application is using Duplex and Super Duplex as a cost-effective alternative to more expensive nickel alloys like Inconel or Hastelloy for certain duties. Their high strength often allows for thinner walls, reducing overall weight and cost while maintaining performance.

Grades We Stock

Duplex Stainless Steel

• UNS S31803 / S32205 (2205 Duplex)

• Excellent resistance to chloride stress corrosion cracking

Super Duplex Stainless Steel

• UNS S32750 / S32760 (2507 Super Duplex)

• Higher strength and enhanced resistance to seawater and aggressive media

Shapes & Forms We Supply

• Pipes & Tubes

• Sheets & Plates

• Round Bars & Rods

• Forged Fittings

• Flanges

• Custom Machined Components.

Certified Quality, Every Time

Our Duplex and Super Duplex products comply with the highest international standards.
We provide:

• ISO Certification

• Mill Test Certificates (MTC EN 10204 3.1 / 3.2)

• ASTM / ASME / NACE Standards Compliance

Why Ganesh Metals?

• 40+ Years of Experience in specialty stainless steels

• Ready Stock Availability for fast global deliveries

• Customer-Centric Service – customized sizes, cut lengths, and urgent supply options