Duplex 2205 Round Bar is a high-performance alloy that combines the best of both austenitic and ferritic stainless steels. Known for its superior mechanical strength and corrosion resistance, this grade is widely used across demanding industries such as chemical processing, marine engineering, oil and gas, and structural applications.
This duplex stainless steel bar is engineered to handle aggressive environments and high-stress conditions where standard stainless steels may fail.
What is Duplex 2205 Round Bar?
The is composed of approximately 22% chromium, 5–6% nickel, and 3% molybdenum. The alloy’s dual-phase microstructure (roughly equal parts ferrite and austenite) delivers higher yield strength—almost double that of 304 and 316 grades—while offering exceptional resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking (SCC).
The grade complies with key standards including ASTM A276, ASTM A479, UNS S31803, and UNS S32205, making it suitable for global industrial applications.
Chemical & Mechanical Highlights
Chromium (Cr): Enhances corrosion resistance
Nickel (Ni): Improves ductility and weldability
Molybdenum (Mo): Increases resistance to pitting and crevice corrosion
Tensile Strength: > 620 MPa
Yield Strength: > 450 MPa
Hardness: ≤ 293 HB
This combination of elements ensures performance even in seawater, acidic, and chloride-rich conditions.
Benefits of Duplex 2205 Round Bar
High Strength-to-Weight Ratio: Enables use in lighter sections without compromising integrity
Superior Corrosion Resistance: Ideal for marine and chemical exposure
Outstanding Fatigue Strength: Performs under cyclic loading
Thermal Conductivity: Better than austenitic stainless steels
Lower Thermal Expansion: Provides dimensional stability at high temperatures
Cost-Effective: Offers long service life and reduces maintenance costs
These advantages make Duplex 2205 stainless steel round bar an excellent choice for long-term performance in corrosive and high-pressure settings.
Industrial Applications of Duplex 2205 Round Bar
Thanks to its high durability and resistance to harsh environments, Duplex 2205 round bar is widely used in:
Oil and Gas Pipelines: Ideal for transporting corrosive fluids under pressure
Offshore Structures: Withstands saltwater corrosion and wave stress
Heat Exchangers and Condensers: Resists fouling and thermal degradation
Pulp and Paper Equipment: Endures acidic process chemicals
Desalination Plants: Resists chloride-rich brine corrosion
Chemical Storage Tanks and Pressure Vessels: Maintains integrity under aggressive chemical attack
Architectural and Structural Components: Offers strength and aesthetic surface finish
Available Forms and Sizes
Duplex 2205 bars are available in various surface finishes like hot-rolled, cold-drawn, peeled, turned, and centerless ground. Common diameters range from 6mm to 350mm, with lengths typically up to 6 meters or custom-cut as per project needs.
Equivalent Grades of Duplex 2205
UNS S31803 / S32205 (USA)
1.4462 (EN/DIN)
F51 / F60 (ASTM A182)
SS 2377 (Swedish Standard)
These equivalents make Duplex 2205 globally accepted and easy to source for international projects.
Choosing the Right Duplex 2205 Round Bar Supplier
For project-critical applications, it is important to procure from certified and experienced suppliers. Look for vendors offering:
ISO-certified production
Mill test certificates (MTC)
Custom machining and cutting services
Fast delivery across major markets
Third-party inspection (TPI) on request
Compliance with NACE, PED, and ASME codes
A reputed supplier ensures that your Duplex 2205 stainless steel round bar meets all technical and safety requirements.
Why Duplex 2205 Round Bar Is a Preferred Choice
Compared to 304 or 316 stainless steel bars, Duplex 2205 round bars offer significantly better performance in terms of strength, wear resistance, and longevity under corrosive conditions. For engineers and project managers, this translates to greater reliability, lower lifecycle costs, and reduced downtime.
Whether you’re building an offshore platform, designing a pressure vessel, or fabricating chemical processing units, Duplex 2205 bars ensure unmatched quality and durability.
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