UNS S31008 1.4845 Stainless Steel Hollow Structural Section SHS RHS CHS Tube Pipe

UNS S31008 / 1.4845 (310S / 2520) Heat-Resistant Stainless Steel Hollow Structural SectionsPeak Kong Special Steel leverages extensive expertise in specialty steel R&D and manufacturing to develop proprietary Laser-Arc Hybrid Welding + CMT automated flexible tube production lines.
We provide high-standard, high-precision, large-volume and customized manufacturing of UNS S31008 / 1.4845 (310S / 2520) heat-resistant stainless steel Square HSS, Rectangular HSS and Circular HSS. Our advanced manufacturing technology enables 100% full-penetration welding for wall thicknesses from 5 mm to 50 mm, providing robust structural solutions for high-temperature, heavy-load and extreme-service applications worldwide.
Core Technical Capabilities & Global CertificationsMajor International Structural Design Standards:
This product range is compatible with Eurocode 3 Part 1-4 (EN 1993-1-4) for stainless steel structural design, AISC 370 for structural stainless steel design, and ASCE 8 for cold-formed stainless steel structures, providing engineering consultants worldwide with reliable references for structural calculations and high-temperature service assessment.
Comprehensive International Manufacturing Standards:
Production and quality control are aligned with major international standards including EN 10378:2025 for stainless steel structural sections, EN 10219 for cold-formed welded structural hollow sections, EN 10216 for seamless steel tubes for pressure purposes, and ASTM A554 for mechanical tubing and structural applications.
Factory & Welding Quality Certifications:
Our production capabilities are supported by European structural fabrication requirements, including EN 1090 series requirements for the execution of steel and stainless steel structures.
Peak Kong Special Steel also implements ISO 3834-5 quality requirements for fusion welding of metallic materials. Welding Procedure Qualification Records (WPQR / PQR) and welding personnel/processes can undergo verification and auditing by internationally recognized organizations including SGS, TÜV and DNV.
Green & Low-Carbon Manufacturing with Full Traceability:
The product range incorporates environmentally responsible and low-carbon manufacturing principles. Shipments can be supplied with official inspection reports, non-destructive testing documentation including UT / MT / PT, and complete Material Test Certificates (MTC 3.1 / 3.2). Environmental Product Declaration (EPD) documentation can also be provided according to project requirements.
UNS S31008 / 1.4845 Stainless Steel Hollow Structural Section SpecificationsPeak Kong Special Steel overcomes conventional tooling limitations and can manufacture standardized or non-standard cross-sections in production quantities or according to customer drawings. Full-penetration welding is available for wall thicknesses up to 50.0 mm, subject to material, joint configuration and qualified welding procedures.
Square HSS
Size: 40 × 40 mm to 500 × 500 mm
Wall Thickness: 3.0 mm to 50.0 mm
Rectangular HSS
Size: 50 × 30 mm to 600 × 400 mm
Wall Thickness: 3.0 mm to 50.0 mm
Circular HSS / Tubes
Outside Diameter: Ø48 mm to Ø1200 mm
Wall Thickness: 3.0 mm to 50.0 mm
Custom HSS
Manufactured precisely according to customer drawings, technical specifications and structural requirements, with wall thicknesses up to 50.0 mm.
Our flexible manufacturing capability eliminates conventional tooling and standard-size limitations, supporting special wall thicknesses, unequal rectangular sections and complex polygonal or irregular cross-sections.
Note: All specifications support cut-to-length delivery, precision sawing, polishing, blasting, pickling and passivation according to project requirements.
Premium High-Temperature Performance of UNS S31008 / 1.4845Exceptional High-Temperature Resistance & Oxidation Resistance:
UNS S31008 / 1.4845 features a high chromium and nickel alloy composition, commonly associated with the 25% Cr / 20% Ni “2520” grade designation. At elevated temperatures, the alloy forms a dense Cr₂O₃ protective oxide layer, providing excellent oxidation resistance.
For properly engineered applications, 310S can be used in high-temperature environments approaching 1150°C in air under suitable continuous-service conditions, while intermittent exposure limits depend on service conditions and applicable material specifications. The alloy also offers strong resistance to creep, sulfidation and carburization in demanding high-temperature environments.
Advanced Welding Technology for High-Temperature Structural Integrity:
310S is an austenitic heat-resistant stainless steel. Peak Kong Special Steel combines high-energy Laser-Arc Hybrid Welding with low-heat-input CMT technology to precisely control the welding thermal cycle, solidification behavior and cooling rate.
This advanced process helps minimize excessive grain coarsening and undesirable phase precipitation within the heat-affected zone, supporting stable weld metallurgy and maintaining high-temperature mechanical performance and toughness comparable to the base material when properly qualified and controlled.
Contact Peak Kong Special SteelFor UNS S31008 / 1.4845 stainless steel hollow structural sections, processing services, technical drawing review, welding procedure qualification documentation (WPQR / PQR) or the latest commercial quotation, please contact Peak Kong Special Steel.
For global green infrastructure, choose Peak Kong Special Steel.
Peak Kong Special Steel provides advanced, safety-focused and internationally certified specialty steel solutions, integrating material supply, precision fabrication, laser hybrid welding, inspection and customized engineering services into a comprehensive one-stop solution.