2507 1.4410 Super Duplex Stainless Steel Hollow Structural Section SHS RHS CHS Tube Pipe

Technology Redefining Extreme-Service Engineering: Peak Kong Special Steel 2507 / 1.4410 Super Duplex Stainless Steel Hollow Structural Sections Reshaping Heavy-Duty Corrosion-Resistant Structural SystemsIn the ambitious landscape of modern offshore engineering, extreme chemical processing and long-span landmark infrastructure, the ultimate load-bearing capacity and extreme corrosion resistance of enclosed hollow structural sections can directly determine the safety, service life and overall success of an engineering project.
Facing the technical limitations of conventional manufacturing in forming and welding ultra-thick-wall Super Duplex Stainless Steel tubing, Peak Kong Special Steel has achieved a major technological breakthrough with its 2507 / 1.4410 Super Duplex Stainless Steel Hollow Structural Sections (HSS).
By integrating advanced materials, laser hybrid welding and flexible manufacturing capabilities, Peak Kong Special Steel provides a one-stop solution combining high structural performance, corrosion resistance, precision fabrication and lifecycle-oriented engineering value for demanding applications worldwide.
Core Breakthrough: Laser Hybrid Welding + CMT for 30 mm Ultra-Thick-Wall HSSDue to its exceptionally high alloy content, 2507 Super Duplex Stainless Steel is highly sensitive to thermal input during thick-wall tube forming and welding. Improper thermal cycles may increase the risk of welding defects or undesirable intermetallic phase precipitation, such as sigma phase, potentially affecting toughness and corrosion resistance.
Peak Kong Special Steel applies advanced Laser-Arc Hybrid Welding + CMT (Cold Metal Transfer) technology together with independently developed automated tube production lines to overcome these manufacturing challenges and achieve high-volume, high-precision production of thick-wall hollow structural sections with wall thicknesses of up to 30 mm.
100% Full-Penetration WeldingOversized structural components and hollow sections can be manufactured with 100% full-penetration welding, providing continuous structural integrity and reliable load transfer across welded joints.
For applications requiring high structural reliability under static, dynamic or cyclic loading, the welding solution can provide performance designed to approach the structural continuity expected from integrated sections, subject to qualified welding procedures and project requirements.
Precise Thermal Input ControlThe high energy density of laser welding combined with the low heat-input characteristics of CMT enables precise control of the welding thermal cycle.
This helps control cooling rates, refine the weld microstructure and reduce the risk of detrimental intermetallic phase precipitation, supporting the required low-temperature impact toughness and corrosion resistance of Super Duplex Stainless Steel welded joints.
Actual welding parameters, heat input, interpass temperature and metallurgical requirements are established through qualified welding procedures based on material thickness, joint configuration and project specifications.
International Standards for Global Engineering Projects2507 / 1.4410 Super Duplex Stainless Steel Hollow Structural Sections from Peak Kong Special Steel can be manufactured and engineered in alignment with internationally recognized material, manufacturing and structural design frameworks.
International Manufacturing and Product StandardsApplicable standards include:
EN 10378:2025
EN 10219 — Cold-Formed Welded Structural Hollow Sections
EN 10216 — Seamless Steel Tubes for Pressure Purposes
ASTM A554 — Welded Stainless Steel Mechanical Tubing

Additional EN, ASTM, JIS and BS requirements can be incorporated according to project specifications.
Welding Procedure and Quality AssuranceOur welding teams and manufacturing procedures can undergo rigorous audits and certification requirements from internationally recognized organizations such as TÜV and DNV, supporting high-performance applications in severe operating environments.
Compatibility with International Structural Design CodesThe product range can support structural design according to:
Eurocode 3 Part 1-4 (EN 1993-1-4) — Design of Stainless Steel Structures
AISC 370 — Specification for Structural Stainless Steel Buildings
ASCE 8 — Specification for the Design of Cold-Formed Stainless Steel Structural Members

These design frameworks provide structural engineers and international engineering consultants with reliable references for section selection, load-bearing calculations and structural verification.
100% Quality TraceabilityFinished products can be supplied with official inspection reports and complete Material Test Certificates (MTC 3.1 / 3.2).
CE and UKCA certification support can be provided according to applicable project requirements, while production and material traceability systems enable individual products and batches to be tracked throughout the project lifecycle.
2507 / 1.4410 Super Duplex Stainless Steel Hollow Structural Section SpecificationsPeak Kong Special Steel overcomes the tooling and manufacturing limitations associated with conventional production methods. Through automated flexible production lines, we can manufacture standard structural sections in volume while also supporting drawing-based customization of special dimensions and ultra-thick-wall hollow sections.
Square Hollow Sections (SHS)50 × 50 × 4 mm to 600 × 600 × 30 mm
Rectangular Hollow Sections (RHS)60 × 40 × 4 mm to 800 × 400 × 30 mm
Circular Hollow Sections (CHS)Φ60 × 4 mm to Φ1200 × 30 mm
Non-Standard Customized Hollow SectionsCustomized hollow structural sections can be manufactured according to customer requirements, including:
Non-standard outside dimensions
Special wall thicknesses
Irregular cross-sections
Customized structural geometries
Drawing-based special profiles
Large-size and ultra-thick-wall sections

Note: All specifications can be supplied with customized lengths, precision sawing and surface finishing, including polishing, pickling and passivation. Customers are welcome to provide engineering drawings for technical evaluation and manufacturing coordination.
Advanced Applications in High-End Industrial EngineeringDeepwater Engineering and Offshore Oil & GasSubsea production structures and piping support systems
Heavy-duty structural frames for offshore drilling platforms
Main structural frameworks for offshore ventilation and utility corridors
Topside structures for offshore wind turbine jacket systems
High-pressure piping networks for seawater desalination facilities
Corrosion-resistant structural components for offshore energy projects

Environmental Protection, Chemical Processing and Heavy Industrial EquipmentHeavy-duty outdoor pipe supports in chemical plants
Main structural sections for exhaust towers handling high-temperature corrosive gases
Load-bearing hollow structural components within flue-gas desulfurization (FGD) systems
External structural components for nuclear power facilities
Equipment support structures exposed to aggressive chemical environments

Modern Curtain Walls and Landmark BuildingsHeavy-duty primary structural columns for coastal high-rise landmark buildings
Load-bearing tied-arch and truss systems for large international airport terminals
High-strength structural trusses for cross-sea high-speed railway stations
Heavy-duty support structures for high-rise glass curtain walls
Architectural structural systems designed for long-life and reduced lifecycle maintenance

Infrastructure and Marine TransportationStructural pipeline support brackets for sea-crossing bridges
Load-bearing base structures for waterfront observation platforms
Primary load-bearing structures for marine terminals and piers
Impact and collision protection systems
Heavy-duty support systems for underground utility corridors
Structural components for major coastal infrastructure projects

High-Performance Material Advantages of 2507 / 1.44102507 / 1.4410 Super Duplex Stainless Steel combines high mechanical strength with excellent resistance to pitting, crevice corrosion and chloride-induced stress corrosion cracking.
Its high alloy content and optimized duplex microstructure make it particularly suitable for severe environments involving seawater, chlorides, chemical media and high humidity.
For structural applications, the combination of high strength and corrosion resistance can enable optimized section dimensions, reduced structural weight and lower long-term corrosion-protection requirements compared with conventional materials in suitable service environments.
For welded structures, strict control of welding heat input and thermal cycles is essential to preserve the required phase balance, toughness and corrosion resistance. Peak Kong Special Steel applies qualified welding procedures and inspection systems to support reliable fabrication of thick-wall structural sections.
One-Stop Engineering and Fabrication SolutionPeak Kong Special Steel provides a complete service chain covering:
Material selection and technical consultation
Engineering drawing review
Standard and non-standard HSS development
Laser hybrid welding + CMT
Full-penetration welding
Precision cutting and sawing
Beveling and edge preparation
Surface polishing, pickling and passivation
Structural prefabrication and assembly
NDT inspection including UT / MT / PT where applicable
Dimensional and geometric inspection
MTC 3.1 / 3.2 documentation
Third-party inspection coordination
CE / UKCA certification support
Project-based packaging and delivery

From technical drawing coordination and precision fabrication to high-performance welding and internationally recognized NDT inspection, Peak Kong Special Steel provides an integrated engineering solution designed to simplify procurement and improve project execution.
Partner with Peak Kong Special Steel for the Future of Green InfrastructurePeak Kong Special Steel provides more than high-performance specialty steel materials. We deliver integrated engineering solutions combining advanced materials, innovative welding technology, precision manufacturing, quality assurance and traceability.
With 2507 / 1.4410 Super Duplex Stainless Steel Hollow Structural Sections, we help global engineering owners, consultants and EPC contractors develop structural systems capable of meeting demanding requirements for strength, corrosion resistance, dimensional precision and long-term performance.
For bulk procurement, drawing-based customization, oversized hollow structural sections or one-stop value-added fabrication services, please contact Peak Kong Special Steel.
Peak Kong Special Steel provides advanced, reliable and internationally oriented one-stop solutions for specialty steel materials, structural profiles, precision fabrication, welding, inspection and demanding engineering applications.