Duplex Stainless Steel Bar Supplier | Manufacturer
| Bar Type | Size Range |
|---|---|
| Round Bar | Ø6 mm – Ø300 mm |
| Square Bar | 10 mm × 10 mm to 100 mm × 100 mm |
| Flat Bar | Thickness: 3 mm – 60 mm; Width: up to 200 mm |
| Hex Bar | AF size: 8 mm – 75 mm |
| Lengths | 2–6 meters (custom cut-to-length available) |
| Surface Finish | Black, pickled, polished, peeled, ground |
Duplex stainless steel bars are engineered for demanding industrial environments that require both mechanical strength and superior corrosion resistance. With a mixed microstructure of austenite and ferrite, duplex grades such as UNS S31803 and S32205 offer twice the strength of standard austenitic stainless steels like 304 and 316, along with exceptional resistance to chloride-induced stress corrosion cracking.
Available in various forms (round, square, hex, flat), our duplex stainless steel bars are produced in accordance with ASTM A276, A479, and EN 10088, suitable for machining, forging, and structural assembly.
Overview of Duplex Stainless Steel Bar
Globally, chloride-induced corrosion costs industries $3.2B annually (NACE 2025). Our duplex stainless steel bars deliver 550+ MPa yield strength and PREN 32-45+ corrosion resistance, outperforming traditional steels in chemical, oil/gas, and marine applications. Engineered under ASTM A276/ASME SA479, these bars offer unmatched durability, weight savings, and lifecycle cost efficiency. Welcome to inquire and contact us the lastest price.
Chemical Composition (UNS S31803 / S32205)
| Element | Min (%) | Max (%) |
|---|---|---|
| Chromium (Cr) | 21.0 | 23.0 |
| Nickel (Ni) | 4.5 | 6.5 |
| Molybdenum (Mo) | 2.5 | 3.5 |
| Nitrogen (N) | 0.14 | 0.20 |
| Carbon (C) | – | 0.03 |
| Iron (Fe) | Balance | Balance |
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 620 MPa |
| Yield Strength (0.2%) | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness (Brinell) | 170–240 HB |
| Density | 7.80 g/cm³ |
| Thermal Conductivity | 19 W/m·K at 100°C |
| Operating Temp Range | -50°C to +300°C |
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Key Advantages of Duplex Stainless Steel Bar
High Mechanical Strength: Enables weight reduction in load-bearing applications
Outstanding Corrosion Resistance: Performs reliably in seawater, chemical, and chloride-rich environments
Superior SCC Resistance: Highly resistant to stress corrosion cracking
Good Weldability & Machinability: Suitable for all conventional fabrication processes
Long Service Life: Reduces maintenance and replacement costs over time
Versatility: Available in a variety of bar shapes and surface finishes
Stainless steel rods have many advantages and applications in different industries and fields. It serves different purposes, and its high performance and corrosion resistance are very advantageous. If you want to learn more about stainless steel, please feel free to contact us. Our company has professional experts to help you answer your questions and provide you with customized solutions for free. You can rest assured to consult. If you need any products, please let us know. We hope to establish a long-term trade relationship through cooperation.
Applications Across Industries
| Industry | Application Examples |
|---|---|
| Marine & Offshore | Propeller shafts, rudders, subsea fasteners |
| Oil & Gas | Drill collars, valve components, pipeline supports |
| Chemical Processing | Agitators, reactor vessels, pressure piping |
| Desalination Plants | Pump shafts, structural reinforcements |
| Paper & Pulp | Digesters, bleach tanks, slurry pipe supports |
| Construction | Structural bars in bridges, tunnels, and stadiums |
Why Choose Us as Your Duplex Bar Supplier?
Expertise in Duplex Steels: Over 15 years of experience supplying duplex alloys to global B2B clients
Mill Direct Supply: Competitive pricing from ISO 9001 certified factory
Inventory & Customization: Ready stock and flexible production for custom bar dimensions
Full Certification: Material test certificates (EN 10204 3.1/3.2) included with every order
Global Delivery: Fast export services to Europe, North America, Middle East, and SEA
Duplex stainless steel bars deliver unmatched performance for industries that demand both strength and corrosion resistance. Whether you’re building offshore platforms, processing aggressive chemicals, or reinforcing large structures, duplex bar offers the performance and longevity you need.
As a trusted duplex bar supplier in China, we provide high-quality products, fast delivery, and technical support for your critical applications.