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Help CenterSteel H Beam & H Section Steel，Q235B、Q355B、SS400、S235JR、S355JR、ASTM A36、A992
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1. Product Overview
Hot rolled H-beam features standard H cross-section integrally formed by hot rolling with parallel equal-thickness flanges and vertical web, different from I-beam with sloped inner flanges. Parallel flanges enable easy drilling and bolt connection. It is classified into hot rolled H-beam and welded H-beam. Per GB/T 11263, hot rolled H-beam includes 4 series: HW wide flange, HM medium flange, HN narrow flange, HP pile H-beam, only produced from carbon & HSLA steel without stainless steel grades.It owns large section modulus, superior bending & torsional stiffness, light self-weight and high load capacity, widely used as core load-bearing section for steel factories, high-rise frames, bridges, wind power, marine pile foundations and heavy equipment bases, mainstream structural steel for domestic infrastructure and overseas export steel structures.
2. Applicable Standards
Domestic Chinese Standards
GB/T 11263-2024 Hot Rolled H-Beam & Split T-Beam (Core Standard)
GB/T 700 Carbon Structural Steel, GB/T 1591 HSLA Structural Steel
GB 50017 Code for Design of Steel Structures, GB 50011 Code for Seismic Design of Buildings
International Export Standards
ASTM A36/A572 Gr50; EN10025 S275JR/S355JR; JIS G3101 SS400; European HEA/HEB/HEM wide flange H-beam, US W-series wide flange beam
Supporting Certifications
SGS mechanical & low temperature impact test report, original Mill Test Certificate (MTC), CE steel structure certification, third-party UT NDT report, classification society certificate for marine engineering.
3. Main Material Grades
3.1 Ordinary Carbon H-Beam (Light factories, low-rise frames, small supports)
Q235B; export equivalent S235JR, ASTM A36, SS400, good ductility & weldability with top cost performance
3.2 HSLA High Strength H-Beam (Mainstream heavy load, high-rise, bridge, wind power)
Q355B (former Q345B); export S355JR, A572 Gr50, yield strength 355MPa, dedicated for seismic, snow-resistant & long-span heavy load projects
3.3 Weather Resistant H-Beam (Coastal open-air, coastal bridges, outdoor PV supports)
Q355NH, Cu-Ni alloy elements to resist marine salt spray and reduce maintenance cost
3.4 Low Temperature H-Beam (Cold northern regions, LNG supporting, low-temp equipment frames)
Q355D, high impact energy at -20℃ to prevent low-temperature brittle fracture
4. Product Classification & Application
(1) 4 Series Hot Rolled H-Beam
HW Wide Flange H-Beam (Column use)Flange width nearly equal to web height, balanced bidirectional stiffness, excellent anti-sideshift & seismic performance; models HW100×100~HW400×400, for high-rise frame columns, factory load-bearing columns, wind turbine tower columns, equipment bases.
HM Medium Flange H-Beam (Universal beam & column)Flange width between HW and HN, balanced bending & compression resistance; models HM150×100~HM600×300, main & secondary beams of multi-story factories, medium frame beams & columns.
HN Narrow Flange H-Beam (Beam use)Narrow flange & high web, outstanding bending capacity around strong axis; models HN200×100~HN900×300, factory roof girders, platform beams, bridge stringers, simply supported beams.
HP Pile H-Beam (Marine engineering, foundation support)Thickened flanges & web, heavy section with strong extrusion & lateral pressure resistance; HP200×200~HP400×400, dock piles, foundation pit support, offshore wind power foundation piles.
(2) Welded H-Beam
Fabricated by submerged arc welding of two flange plates + one web plate, unrestricted by rolling mill, customized extra-wide, extra-thick & super-height non-standard sections; for special equipment supports, ultra-long span non-standard steel structures, heavy machine bases.
(3) Surface Treatment Types
Hot Rolled Black Finish (Indoor general)Uniform mill scale after high-temperature rolling, lowest cost for indoor factories & embedded frames.
Hot-Dip Galvanized H-Beam (Outdoor anti-corrosion)Integral hot-dip galvanized, zinc coating 60–275g/㎡, neutral salt spray test 500–1200h, for coastal PV, coastal bridges & open-air equipment frames.
Shot Blasted & Painted H-BeamShot blasting to remove mill scale then anti-rust primer/topcoat spraying, for exposed factory steel structures & municipal bridges.
5. Complete Production Process
Hot Rolled H-Beam Process
Slab heating at 1100–1250℃ walking beam furnace → High pressure water descaling → Universal mill continuous rolling for HW/HM/HN sections → ACC accelerated controlled cooling for grain refinement → Uniform cooling on cooling bed → Multi-roll straightening to eliminate bending → Fixed-length flame cutting → Edge burr trimming → Sampling tensile / low-temperature impact / cold bending mechanical test → Steel marking with model, heat batch & grade → Multi-circumferential steel strapping & IPPC wooden pallet warehousing
Welded H-Beam Process
Steel plate blanking cutting → Shot blasting rust removal → Automatic assembling of web & flanges → Double-sided submerged arc automatic welding → Post-welding deformation correction → Edge machining & bevel pretreatment → Weld NDT inspection → Anti-rust treatment & packaging
6. Core Technical Parameters
6.1 Size Range
Web Height H: 100mm～900mm; Flange Width B: 100mm～400mm
Web thickness t1: 4mm～20mm; Flange thickness t2: 6mm～32mm
Standard fixed length: 6m,9m,12m, customized cutting length 4–15m available
Model marking rule: H Height × Width × Web Thickness × Flange Thickness, e.g. HN400×200×8×13, HW300×300×10×15
6.2 Reference Key Mechanical Properties
Q235B: Yield ≥235MPa, Tensile 375–500MPa, Elongation ≥25%, Impact energy ≥34J at 20℃
Q355B: Yield ≥355MPa, Tensile 470–630MPa, Elongation ≥21%, Impact energy ≥34J at -20℃ (mandatory for low-temp projects)
6.3 Dimension & Surface Requirements
Height tolerance ±3mm, flange width tolerance ±2mm, web centerline offset ≤1.5mm/m; straightness ≤2mm/m
Hot rolled surface free of lamination, scar, penetrating cracks & peeling; welded H-beam weld free of pores & slag inclusion, 100% UT NDT Grade Ⅱ qualified
6.4 Machining Performance
Controllable carbon equivalent, compatible with SAW, GMAW & SMAW; parallel flanges support direct drilling, bolt connection, bevel cutting & hot bending without brittle fracture after processing.
7. Core Product Advantages
Parallel wide flange section boosts construction efficiency vs I-beamParallel inner & outer flanges eliminate pre-weld grinding, reduce 30% on-site processing time for bolt & hybrid bolt-weld connection; high lateral stiffness cuts lateral support components & steel consumption.
4 series perfectly match all beam, column & pile scenariosHW exclusive for columns, HN exclusive for girders, HM universal for beams & columns, HP dedicated for piles. Optimized section reduces self-weight by 10%–25% under equal load capacity to lower total project cost.
Integral hot rolling delivers uniform stable internal structureTMCP controlled rolling & cooling refines grain without welding residual stress, superior seismic & fatigue performance to welded sections, hot rolled H-beam is priority choice for high-rise & seismic buildings.
Multiple material & anti-corrosion solutions cover indoor & coastal serviceLow-cost black finish for indoor use; hot-dip galvanized for coastal salt spray; weather resistant steel reduces frequent repainting for long-term wind power & coastal projects.
Sufficient stock + customized welded dual supplyFull standard HW/HM/HN sizes 6–12m in stock; oversized & extra-thick non-standard demand fulfilled by welded H-beam, one-stop service for cutting, shot blasting & galvanizing deep processing.
Complete export compliance documents for global steel structure projectsSupply CE, SGS, original MTC & NDT reports to clear customs for steel factory, bridge export to EU, Southeast Asia, Middle East & Africa.
8. Main Application Fields
8.1 Industrial Steel Structure Factories
Portal frame factory main beams, columns, crane girders, roof secondary beams, equipment maintenance platforms, warehouse load-bearing shelf frames
8.2 High-Rise & Prefabricated Steel Structures
Steel frame beams & columns of high-rise residential, office & mall buildings, prefabricated steel main structure, basement load-bearing frame, seismic steel bone of shear wall
8.3 Transportation & Bridge Engineering
Longitudinal girders of highway/railway steel box girders, bridge pier columns, pedestrian overpasses, bridge reinforcement load-bearing components, tunnel support steel structure
8.4 New Energy Wind & PV Industry
Wind turbine tower bottom columns, main beams of onshore PV supports, offshore wind power foundation piles, energy storage cabinet frame
8.5 Marine Port & Foundation Pit Support
HP bearing piles for docks, container yard supports, load-bearing columns for deep foundation pit support, auxiliary steel structure of offshore drilling platforms
8.6 Heavy Machinery & Special Equipment
Large machine tool bases, lifting equipment load-bearing frames, metallurgical equipment supports, large storage tank support columns, shield machine matching steel structure
9. Packaging, Shipment & Lead Time
Packaging Methods
Domestic hot rolled black H-beam: Stacked by same model & length, cross & vertical steel strapping, supported by steel-wood pallets, iron corner guards to prevent end collision damage, simple anti-rust film wrapped on ends
Hot-dip galvanized / painted H-beam: Whole pallet wrapped with thickened waterproof plastic film to avoid coating scratch during transportation
Export dedicated packaging: Fixed on IPPC fumigated wooden pallets with full moisture-proof film covering, fit for 20GP / 40HC high cube container sea transportation
2. Delivery Warehouse: Spot goods shipped directly from Tianjin Port
3. Lead Time: 5–7 days for regular Q235B/Q355B hot rolled HN/HM stock goods; 12–20 days for customized HW wide column, HP pile grade, galvanized & welded non-standard orders
4. Payment Term: 30% TT advance deposit, balance settled before shipment, L/C letter of credit is not accepted.
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