UNS S32205 S31803 Duplex Stainless Steel Channel Steel UPE UPN C Channel Structural Section

UNS S32205 / UNS S31803 Duplex Stainless Steel ChannelsPeak Kong Special Steel utilizes innovative Laser + CMT hybrid welding technology and independently developed automated flexible production lines to achieve high-volume, high-precision manufacturing of UNS S32205 / UNS S31803 duplex stainless steel channels.
Through an innovative laser hybrid welding process, Peak Kong Special Steel provides an advanced alternative to conventional hot-rolled manufacturing, successfully overcoming the industry limitations associated with hot forming large-size and thick-wall duplex stainless steel structural profiles. The process enables 100% full-penetration welding for weld thicknesses of up to 30 mm. This not only provides structural integrity comparable to integrated sections, but also offers greater flexibility for small-batch, multi-size and highly customized requirements that are difficult to accommodate through conventional hot rolling.
Products can be manufactured in accordance with applicable EN, ASTM, JIS and BS requirements, providing reliable structural solutions for heavy-duty and highly corrosive engineering environments worldwide.
Core Technical Capabilities and Manufacturing AdvantagesInternational Standards CoverageMaterials and products are manufactured in accordance with applicable international standards, including EN 10088-5 for structural stainless steel sections, ASTM A484 / A484M for general requirements for stainless steel products, and EN 10279 for dimensions and tolerances of hot-rolled steel channels.
The product range can also be designed and supplied in accordance with Eurocode 3 Part 1-4 (EN 1993-1-4) for stainless steel structures, providing reliable technical and structural design references for international engineering consultants.
Authoritative Welding Procedure QualificationWelding procedures are qualified in accordance with EN ISO 15614-11 for laser welding and EN ISO 15614-14 for hybrid welding.
Our welding team and manufacturing procedures can be subject to audits and certification requirements from internationally recognized organizations such as SGS, TÜV and DNV, supporting demanding applications involving extreme service conditions and high structural loads.
100% Quality Traceability and International Market AccessFor oversized structural channel sections, 100% full-penetration welding can be provided for weld thicknesses of up to 30 mm.
Products can be supplied with official inspection reports and non-destructive testing documentation, together with Material Test Certificates (MTC 3.1 / 3.2). CE and UKCA certification support can also be provided according to project requirements, facilitating international project procurement and acceptance.
UNS S32205 / UNS S31803 Duplex Stainless Steel Channel SpecificationsPeak Kong Special Steel overcomes the tooling limitations of conventional hot rolling and can manufacture standard structural sections in batch quantities or according to customer drawings. Full-penetration welding capability is available for weld thicknesses up to 30.0 mm.
Parallel Flange Channels (PFC)Size: PFC 100 × 50 – PFC 430 × 100
European Parallel Flange Channels (UPE)Size: UPE 80 – UPE 400
European Standard Channels (UPN)Size: UPN 50 – UPN 400
European Taper Flange Channels (UPA)Size: UPA 80 – UPA 400
Drawing-Based Custom ManufacturingPeak Kong Special Steel can develop customized channel sections according to customer drawings and technical requirements, eliminating the limitations imposed by conventional hot-rolling tooling.
Customization can include:
Customized web heights
Customized flange widths
Asymmetric cross-sections
Non-standard structural geometries
Special section configurations

Note: All specifications can be supplied with customized lengths, precision sawing and surface finishing, including polishing, pickling and passivation. Customers are welcome to provide drawings for technical evaluation and manufacturing coordination.
Advantages of UNS S32205 / UNS S31803 Duplex Stainless Steel ChannelsBreaking Conventional Hot-Rolling Limitations with 30 mm Full-Penetration WeldingThe advanced manufacturing process addresses the challenges associated with producing thick-wall duplex stainless steel channels through conventional hot rolling.
The combination of concentrated laser energy and the low heat input characteristics of CMT helps achieve controlled welding heat input and microstructural stability. Proper process control can help minimize undesirable phase precipitation, such as sigma phase, while maintaining reliable weld strength and low-temperature toughness.
High Strength and Structural Weight ReductionUNS S32205 / UNS S31803 duplex stainless steel offers significantly higher yield strength than conventional 316L stainless steel.
When designed in accordance with Eurocode 3, the higher strength-to-weight ratio can enable optimized cross-sections and reduced material thickness in suitable applications, potentially lowering overall structural weight and material consumption.
Excellent Corrosion ResistanceWith a PREN value of approximately ≥ 35, UNS S32205 / UNS S31803 provides strong resistance to pitting and crevice corrosion in demanding environments.
The material is particularly suitable for coastal and high-humidity environments, seawater exposure and chemical atmospheres, while also providing strong resistance to chloride-induced stress corrosion cracking when appropriately selected and designed.
Actual service life depends on material condition, environmental exposure, structural design, fabrication quality, inspection and maintenance requirements.
Applications of UNS S32205 / UNS S31803 Duplex Stainless Steel ChannelsHigh-End Buildings and Curtain Wall StructuresPrimary support beams for high-rise glass curtain walls
Long-span purlins for coastal landmark buildings
Main structural frames for large outdoor ventilation corridors
Exposed architectural structural systems in corrosive environments

Modern InfrastructureUtility pipeline support brackets for sea-crossing bridges
Load-bearing beams for waterfront observation platforms
Primary load-bearing structures for marine terminals and piers
Impact protection and fender system structures
Support systems for underground utility tunnels

Water Treatment, Environmental Protection and Chemical EquipmentModular load-bearing frames for large seawater desalination plants
Heavy-duty scraper bridge structures for wastewater treatment clarifiers
Reinforcement ring beams for large chemical scrubber towers
External reinforcement structures for chemical pickling tanks
Equipment support systems in corrosive industrial environments

Marine Engineering and Special VesselsEquipment skid bases for offshore drilling platforms
Piping support systems for ocean-going chemical tankers
Piping and equipment support structures for LNG / LPG vessels
Load-bearing bases for deck machinery and lifting equipment
Structural components for offshore and marine engineering modules

Contact Peak Kong Special SteelFor UNS S32205 / UNS S31803 duplex stainless steel channel processing, drawing-based customization, technical consultation or the latest quotation, please contact Peak Kong Special Steel.
Expand the possibilities of green infrastructure with high-performance duplex stainless steel solutions.
Peak Kong Special Steel provides advanced, reliable and internationally oriented one-stop solutions for specialty steel materials, structural profiles, precision fabrication, welding and engineering applications.