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S31803 Duplex
S31803 Duplex: The Balanced Multi-Phase Solution. Cost-effective high strength with superior fatigue resistance.
S31803 Duplex
S31803 is the original specification for the 22% Chrome duplex. It provides a robust solution for industrial piping and structural applications where 316L is insufficient in terms of strength or chloride resistance.
Chemical Composition | Percentage % |
|---|---|
Carbon | 0.03 % max |
Manganese | 2.00% max |
Silicon | 1.00% max |
Nickel | 4.50-6.50% |
Chromium | 21.00-23.00% |
Sulphur | 0.015% max |
Molybdenum | 2.50-3.50% |
Nitrogen | 0.10-0.22% |
Certified Quality Assurance
At Progressive Metal Manufacturing, we ensure every shipment of S31803 Duplex stainless steel meets the highest industrial benchmarks for safety and performance. Our inventory is available with full BS EN 10204 3.1 mill certification or cast and analysis documentation to guarantee material chemistry and mechanical integrity. We prioritize total transparency; simply specify your certification requirements at the point of order to ensure your project remains fully compliant with global engineering standards.
Industrial Applications & Versatility
UNS S31803 Duplex serves as a superior alternative to standard stainless steel in environments
where extreme tensile strength and resistance to stress corrosion cracking are non-negotiable.
This high-performance alloy is a cornerstone for the marine, petrochemical, and power generation industries,
as well as specialized chemical engineering and brewing facilities.
Typical applications for our S31803 stock include the manufacturing of heavy-duty shafts, flanges, bushes, and
high-tensile fasteners. From offshore infrastructure to complex industrial machinery,
Progressive Metal Manufacturing delivers the structural resilience required for the world's most demanding sectors.
Precision Supply & Custom Specifications
We provide a versatile supply chain designed to match the exact specifications of your production line.
Whether you require a single custom-cut prototype or a high-volume production run, our facility offers precision sawing and
profiling for all Duplex profiles.
Our current UNS S31803 availability includes:
Round Bar (Diameters): Precision-stocked from 12mm to 503mm.
Plate & Sheet: Available in thicknesses from 1.2mm to 50mm, adhering to European steel grades.
Available as full-sized stock or bespoke sections cut to your required lengths,
our materials are ready for immediate integration.
Our technical sales team is standing by to provide expert guidance and streamlined quotes for your specific project needs.
UNS S32550 Super Duplex
1.4462 / S32205 Duplex Stainless Steel
UNS S32760 Super Duplex
