Duplex (UNS S31803 F51) Round Bars Supplier in India
Duplex (UNS S31803 F51) Round Bars Supplier in India
Looking for round bars that balance strength with corrosion resistance? Duplex (UNS S31803 F51) Round Bars are the industry’s go-to material for performance under pressure. Known for their dual-phase microstructure (ferrite and austenite), these bars offer twice the strength of standard austenitic stainless steels – making them ideal for marine, oil & gas, and chemical industries.
As a leading Duplex (UNS S31803 F51) Round Bars supplier in India, we deliver quality-tested bars with superior mechanical properties, precision dimensions, and complete traceability. Whether you’re fabricating pressure vessels, desalination systems, or structural supports, Duplex F51 bars are built to last in tough environments.
Why Duplex (UNS S31803 F51) Round Bars Are Trusted for Strength, Corrosion Resistance & Longevity
The Duplex 2205 grade (UNS S31803 / F51) is a stainless steel that offers the best of both worlds – high tensile strength and excellent resistance to stress corrosion cracking, especially in chloride-rich environments. This makes it a go-to for sectors like:
- Oil & Gas – offshore platforms, pipeline systems, separators
- Marine Engineering – boat shafts, propeller systems, brine treatment
- Chemical Processing – pressure vessels, heat exchangers, reactors
- Pharmaceutical & Food Processing – hygiene-focused, corrosion-resistant framework
Its resistance to localized corrosion (pitting and crevice corrosion) combined with good weldability and formability makes Duplex S31803/F51 a smart investment for long-term structural stability. It’s also cost-effective compared to nickel-based alloys, offering performance without over-budgeting.
At our facility, these bars are available in custom lengths, mill-polished finishes, and cut-to-size orders – all with third-party inspection and testing certifications available on request.
Technical Specifications: Duplex (UNS S31803 F51) Round Bars Supplier in India
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 620 MPa |
| Yield Strength (0.2%) | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness (Brinell) | ≤ 290 HBW |
| Density | 7.8 g/cm³ |
Chemical Composition (% by Weight)
| Element | Percentage Range |
|---|---|
| Chromium (Cr) | 21.0 – 23.0% |
| Nickel (Ni) | 4.5 – 6.5% |
| Molybdenum | 2.5 – 3.5% |
| Nitrogen | 0.08 – 0.20% |
| Manganese | ≤ 2.0% |
| Silicon | ≤ 1.0% |
| Carbon | ≤ 0.03% |
| Iron (Fe) | Balance |
Product Specifications
| Available Sizes | 6mm to 120mm diameter |
|---|---|
| Form | Round, Square, Hex Bars |
| Finishes | Bright, Black, Peeled, Ground |
| Standards | ASTM A276 / A479, ASME SA276 / SA479 |
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