S355jr S355j2 S355nl H-Beam Steel Chinese Standard Hot-Rolled Heb200 Steel H Beam

H-beam steel is an economical cross-section high-efficiency profile with a more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. Since all parts of the H-shaped steel are arranged at right angles, the H-shaped steel has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structural weight, and has been widely used.

The S355 series is renowned for its superior strength, toughness, and versatility, with each grade tailored to specific environmental and performance demands:​

S355jr: A general-purpose high-strength grade with a minimum yield strength of 355MPa (for thickness ≤16mm). It exhibits excellent weldability, formability, and machinability, requiring no pre-heating for welding in most cases. The "jr" designation indicates room-temperature impact toughness (tested at +20℃), making it suitable for medium-to-heavy load structures such as building frames, machinery bases, and general engineering components.​

S355j2: Engineered for enhanced low-temperature performance, this grade maintains a minimum yield strength of 355MPa and features improved impact toughness tested at 0℃. It offers superior resistance to brittle fracture in cooler environments, making it ideal for outdoor structures, bridges, and industrial equipment operating in temperate or sub-temperate climates. Its excellent workability supports seamless fabrication via welding, cutting, and bending.​

S355nl: A normalized low-temperature grade (the "nl" denotes normalized rolling and low-temperature toughness) with a minimum yield strength of 355MPa and impact testing at -20℃. It delivers exceptional ductility and fracture resistance even in harsh cold conditions, making it the preferred choice for demanding applications such as high-rise building columns, large-span bridges, offshore platforms, and Arctic or alpine-region infrastructure. The normalized rolling process ensures uniform grain structure, enhancing overall mechanical stability.​

Heb200 Specification & Structural Advantages​

The Heb200 is a standardized H-beam dimension (consistent with European Heb series standards) with precise cross-sectional parameters (typical dimensions: height 200mm, flange width 200mm, web thickness 8mm, flange thickness 12.5mm – exact dimensions comply with GB/T 706-2016). Its structural design offers unparalleled efficiency:​

Optimized Load-Bearing Capacity: The symmetrical "H" cross-section, with wide flanges and a robust web, distributes bending stress evenly, enabling the Heb200 to withstand heavy static and dynamic loads while minimizing material weight.​

Superior Stability: The equal flange width (200mm) enhances lateral stiffness and torsional resistance, preventing deformation in long-span installations or high-wind environments.​

Precision & Compatibility: Hot-rolled production ensures tight dimensional tolerances and smooth surface finish, facilitating compatibility with standard fasteners and seamless integration into prefabricated structural systems. The Heb200's balanced size makes it versatile for both primary and secondary framing in mid-rise buildings and industrial facilities.​

Hot-Rolled Process & Quality Assurance​

Our S355 series H-beams are manufactured via advanced hot-rolling technology, which involves heating carbon steel billets to 1200-1300℃ and shaping them through precision rolling mills. This process delivers key advantages:​

Enhanced Mechanical Properties: Hot-rolling refines the steel's grain structure, improving strength, toughness, and ductility compared to cold-formed alternatives.​

Dimensional Consistency: Computer-controlled rolling ensures uniform cross-sections and consistent thickness across the entire beam length (standard lengths: 6-12m, customizable up to 18m).​

Stringent quality control 贯穿 every production stage:​

Raw material inspection: High-purity low-alloy steel billets meet GB/T 3274-2017 standards, with traceability certificates provided.​

Mechanical testing: Tensile, impact, and bending tests verify yield strength, tensile strength, and toughness comply with S355 grade requirements.​

Dimensional and surface inspection: Laser measurement and visual checks ensure compliance with GB/T 706-2016 tolerances, with no cracks, pitting, or surface defects.​

Surface treatment options: Hot-dip galvanizing, epoxy painting, or anti-rust oil coating to enhance corrosion resistance for indoor/outdoor use.​

Factory Direct Benefits & Application Fields​

As a factory-direct supplier, we offer:​

Competitive pricing by eliminating middlemen, with flexible order quantities (MOQ: 1 ton, bulk discounts available).​

Customization: Tailored lengths, surface treatments, and packaging (bundled, wooden crates) to meet project-specific needs.​

Technical support: Professional engineering team assists with material selection, load calculation, and compliance with international standards (ASTM, EN, DIN) upon request.​

Timely delivery: Global logistics partnerships ensure efficient shipping to major ports worldwide.​

These hot-rolled S355 series H-beams (Heb200 specification) are widely applied in:​

Civil engineering: Mid-to-high-rise buildings, bridges, stadiums, and residential complexes.​

Industrial construction: Factory workshops, warehouses, crane beams, and equipment platforms.​

Infrastructure: Highway overpasses, railway stations, ports, and power plant structures.​

Mechanical manufacturing: Heavy machinery frames, transport equipment chassis, and structural brackets.​