Duplex & Super Duplex Steel Products Supplier, Stockist & Exporter
SteelNix supplies duplex and super duplex steel pipes and tubes, round bars, sheets and plates for offshore, marine, desalination, chemical, oil and gas and other chloride-rich environments.
Complete Duplex & Super Duplex Steel Product Range
Select a product form to view its grades, technical details, applications and enquiry information.
Duplex & Super Duplex Pipes & Tubes
For offshore piping, desalination, heat exchangers, chemical plants, oil and gas and chloride-bearing systems.
- S31803
- S32205
- S32750
- S32760
Duplex & Super Duplex Round Bars
For shafts, valves, pumps, fasteners, marine hardware, subsea components and machined parts.
- F51
- F60
- F53
- F55
Duplex & Super Duplex Plates & Sheets
For pressure vessels, tanks, heat exchangers, process equipment, offshore structures and fabrication.
- 2205
- 2507
- S32760
- S31260
What Are Duplex and Super Duplex Steels?
Duplex stainless steels combine ferritic and austenitic microstructures. This structure provides higher yield strength than common 300-series stainless steels and improves resistance to chloride stress-corrosion cracking.
Super duplex grades contain higher alloying additions for stronger pitting, crevice-corrosion and chloride performance. They are selected for seawater, brine, offshore and severe process environments where both strength and corrosion resistance are critical.
Choose Duplex & Super Duplex Steel by Application
This guide is an initial reference. Final material selection must follow the applicable standard, design conditions, temperature, medium, fabrication route and inspection requirements.
Process & structural service
Balanced strength and corrosion resistance for process, marine and structural applications.
Seawater & severe chloride
For high chloride, seawater and severe pitting or crevice-corrosion exposure.
Subsea & topside
For piping, manifolds, fasteners, valves, pumps and exposed equipment.
Brine & seawater lines
For seawater intake, high-salinity systems, evaporators and heat exchangers.
Acid and chloride media
For vessels, piping and equipment exposed to aggressive process conditions.
Vessels & exchangers
For welded pressure equipment and heat-transfer systems under controlled fabrication.
Popular Duplex & Super Duplex Steel Grades and Specifications
Review the principal material families used for common industrial, pressure, fabrication and engineering requirements.
Standard Duplex
Balanced corrosion resistance and strength for process and chloride service.
Super Duplex
Higher pitting resistance and strength for seawater and aggressive chloride environments.
Special Duplex
Special chemistry for demanding process, marine and project conditions.
Product Forms
Multiple forms for fabrication, pressure service and machining.
| Category | Available Range |
|---|---|
| Product Forms | Pipes, tubes, round bars, forged bars, sheets and plates |
| Common Duplex Grades | UNS S31803, UNS S32205, F51, F60 and UNS S31260 |
| Common Super Duplex Grades | UNS S32750, UNS S32760, F53 and F55 |
| Typical Applications | Offshore, marine, desalination, chemical processing, oil and gas and heat exchangers |
| Quality Documents | MTC, PMI, dimensional inspection and corrosion-testing support as applicable |
| RFQ Details | Product form, UNS or ASTM grade, size, thickness, quantity, delivery location and inspection scope |
Industries We Serve
SteelNix supports project, maintenance, fabrication, OEM, stock and export enquiries across demanding industrial sectors.
Offshore
Topside, subsea, manifolds, piping and exposed components.
Marine
Seawater lines, ship systems and corrosion-resistant hardware.
Desalination
Intake, brine, evaporator and high-chloride systems.
Oil & Gas
Process piping, valves, pumps and sour or chloride service.
Chemical Plants
Vessels, process equipment and corrosive-fluid handling.
Pulp & Paper
Digesters, bleaching and chloride-bearing process systems.
Water Treatment
Filtration, brine and aggressive water-service equipment.
Power & FGD
Flue-gas desulphurisation and corrosion-critical plant systems.
Why Choose SteelNix?
The page is designed to help buyers move from product and grade research to a technically complete quotation request.
Broad Product Range
Compare the main product forms and grade families from one professional category hub.
Application Guidance
Use practical service-based information to narrow the initial grade selection.
Documentation Support
MTC and inspection requirements can be discussed before order finalisation.
Clear RFQ Process
Complete technical details help reduce delays and improve quotation accuracy.
What to Include in Your Enquiry
Complete technical information reduces follow-up questions and helps the correct product, grade, standard and delivery requirement be reviewed.
Frequently Asked Questions
Helpful answers for buyers comparing duplex & super duplex steel products and specifications.
What is the difference between duplex and super duplex steel?
Which duplex grades does SteelNix supply?
Which super duplex grades are available?
Where are duplex and super duplex products used?
Can SteelNix provide PMI and MTC?
What information is needed for pricing?
Related Steel Product Families
Review other SteelNix material categories when the project requires a different balance of cost, strength, corrosion or temperature performance.
Need Duplex & Super Duplex Steel Products for Your Project?
Send the product form, grade, dimensions, quantity, standard, delivery location and required documents. SteelNix can review material availability and quotation details.