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Help CenterSteel H Beam & H Beam，Q235B、SS400、Q355B/Q355C/Q355D、Q355NH、Q355NQR、Q420B、Q460C
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1. Product Overview
Hot Rolled H Section Steel complies with national standard GB/T 11263-2024 Hot Rolled H and Cut T Section Steel. It features an H-shaped cross-section integrally hot rolled with parallel equal-width flanges and vertical web, distinguished from I-beam with sloped inner flanges. All flange surfaces are fully parallel with neat right-angle edges.
It is divided into two major types: hot rolled H beam and welded H beam. Integral hot rolled sections have no welding residual stress and superior bending, shear and seismic resistance; welded H beams support custom extra-large non-standard cross-sections. With light dead weight, large section modulus and high mechanical efficiency, it serves as the core load-bearing beam & column material for steel structure workshops, high-rise buildings, bridges, equipment foundations, steel pipe piles and municipal viaducts, and is the preferred section steel for prefabricated steel structures.
Load-Bearing Mechanical Principle
The symmetrical H cross-section concentrates steel on flanges far from the neutral axis, delivering much higher bending stiffness than I-beams and channel steel under equal weight. Parallel flanges simplify bolted and welded connections without extra edge preparation. Uniform metallographic structure without welding stress resists deformation and cracking under seismic and alternating heavy loads, adapting to axial compression, transverse bending and shear working conditions simultaneously.
2. Four Classifications & Codes per National Standard
HW Wide Flange H BeamFlange width ≈ section height, nearly square cross-section with excellent compression resistance, exclusively for building load-bearing columns, equipment uprights and foundation piles.Typical sizes: HW100×100, HW200×200, HW300×300
HM Medium Flange H BeamFlange width between wide and narrow types, universal for beams and columns, multi-story factory frames and secondary bridge load-bearing components.Typical sizes: HM150×100, HM294×200
HN Narrow Flange H Beam (Largest Market Demand)Flange width far smaller than section height, optimal bending performance for floor & roof main beams, secondary beams and viaduct girders.Typical sizes: HN200×100, HN400×200, HN600×200
HP Pile H BeamThickened flanges and webs with strong lateral compression resistance, used for foundation pit support, offshore wind power piles and river cofferdam bearing piles.
3. Main Steel Grades, Delivery Status & Application Scenarios
1. Carbon Structural H Beam (Mainstream Stock Grade)
Q235B, SS400Minimum yield ≥235MPa, good plasticity and weldability for light-load indoor workshops, warehouses, low-rise steel structures and simple municipal supports.
2. HSLA H Beam (Mainstream for Seismic & Heavy-Duty Projects)
Q355B/Q355C/Q355D (Upgraded from old Q345), S355JRMinimum yield ≥345MPa with qualified low-temperature impact toughness, mandatory for high-rise buildings, long-span workshops, bridges, cold storage and coastal seismic key projects.
3. Weathering H Beam (Long-Term Outdoor Exposure)
Q355NH, Q355NQR alloyed with Cu, Cr, Ni to resist UV, rain and salt fog corrosion for landscape footbridges, open-air trestles and exposed bridge components.
4. Marine & Bridge Special H Beam
Q355q, CCSB, AH36, qualified for low-temperature impact and fatigue load for offshore platforms and cross-river/sea bridge main structures.
5. Ultra-High Strength H Beam (Super High-Rise Heavy Load)
Q420B, Q460C for super high-rise steel structures and heavy-duty equipment bases.
Equivalent International Export Grades
ASTM A36, A992; EN S235JR, S355JR; JIS G3101 SS400, SM490
Standard Delivery Heat Treatment Status
Hot Rolled (AR), TMCP Controlled Rolling; normalized delivery available for export and low-temperature projects. Surface options: as-hot-rolled black scale, shot blasted pre-treated, hot-dip galvanized anti-corrosion.
4. Complete Specification Parameters
Cross-Section Dimension RangeHeight H: 100mm～1700mm; Flange Width B: 50mm～550mm;Web Thickness t1: 6mm～40mm; Flange Thickness t2: 8mm～45mm;Regular stock: 100×100 ~ 900×300; custom hot rolled / welded extra-large sections up to 1700×550.
Standard Fixed Length6m, 9m, 12m; custom 3m, 15m, 18m, multiple lengths, short cut pieces & pre-beveled finished products available.
Delivery Forms① Integral hot rolled H beam: Standard stock, no welding stress, cost-effective;② Welded H beam: Custom non-standard extra-large sections & special thickness;③ Cut T section steel: Split from H beam for trusses, secondary beams and curtain wall frames;④ Hot-dip galvanized H beam: Zinc coating 60–280g/㎡ for coastal & chemical corrosive environments.
Surface Delivery TypesAs-hot-rolled black scale, shot blasted descaled, anti-rust oil coated, full hot-dip galvanized.
Dimensional Tolerance Control
Height & width tolerance ±1.0~±2.5mm; strict negative tolerance for web & flange thickness; straightness ≤2mm per meter, free of torsion and excessive flange camber, flat burr-free ends.
5. Complete Production Process of Hot Rolled H Beam
Hot metal pretreatment → Converter + LF furnace refining & micro-alloy adjustment → VD vacuum degassing → Continuous casting rectangular slab → Uniform high-temperature heating in walking beam furnace → Multi-pass universal mill integral H-section rolling → Laminar accelerated cooling → Heavy-duty multi-roll straightening → Fixed-length flame cutting → End grinding & cleaning → Marking of model, grade & heat number → Batch sampling for physical tests → Stacked with wooden spacers, strapping & warehousing
6. Mandatory Batch Inspection Standards (Sampling per heat batch, re-inspection required for project incoming materials)
6.1 Core Physical & Chemical Mechanical Tests
Tensile test: Yield strength, tensile strength and elongation to meet compression & bending design load of beams and columns;
180° cold bend test: No cracks or lamination on flanges and webs after bending for on-site bending & welding processing;
Charpy V-notch low-temperature impact test (Q355C/D, bridge & marine grades): Qualified subzero impact energy to eliminate low-temperature brittle fracture risk;
Spectrochemical analysis: Strict control over harmful impurities C, S, P to reduce welding cold crack risks;
Zinc coating test (Galvanized H Beam): Gravimetric method to verify coating thickness and salt spray durability.
6.2 Appearance & Dimensional Inspection
Parallel flanges without inward tilt, intact right-angle edges, surface free of cracks, scabs, folds and pits; section height, flange width, thickness and torsion measured and recorded batch by batch.
7. Core Product Advantages
Parallel flanges greatly improve construction connection efficiencyFully parallel flange surfaces eliminate secondary grinding for bolt splicing and groove welding, drastically shortening on-site steel structure installation period.
High mechanical section efficiency for lightweight cost reductionSaves 15%–30% steel compared with I-beams and channel steel under equal bearing capacity, lowering building dead weight and foundation cost.
Integral hot rolled forming without welding residual stressUniform internal metallographic structure with superior seismic and fatigue resistance, preferred for high-rise and bridge key projects over welded sections.
Full classification coverage for one-stop beam, column & pile matchingHW for columns, HM universal, HN for main beams, HP for foundation piles, complete full-range specifications for unified procurement.
Comprehensive machinability for all deep processingSupports arbitrary cutting, punching, bending, welding, shot blasting and hot-dip galvanizing, compatible with prefabricated component machining.
Diverse anti-corrosion solutions for complex environmentsMultiple options including indoor oil-coated black scale, outdoor shot blasting and heavy-duty coastal hot-dip galvanizing.
8. Main Application Fields
Industrial Steel Structure Workshops (Core Application)Portal frame workshops, warehouses, logistics parks, clean rooms, cold storage: load-bearing columns, roof main beams, floor secondary beams and crane girders.
High-Rise Steel Structure BuildingsHigh-rise office buildings, hotels, residential prefabricated steel buildings: frame columns, lateral force-resisting frame beams and core tube load-bearing components.
Road, Bridge & Municipal EngineeringCross-river bridges, urban viaducts, pedestrian footbridges, tunnel supports, pipe gallery brackets and giant advertising billboard steel frames.
Offshore & Water Conservancy EngineeringOffshore wind power foundations, dock trestles, river cofferdams, foundation pit H-beam piles and reservoir load-bearing supports.
Machinery & Special ProjectsHeavy-duty equipment bases, large machine tool frames, crane track supports, waste incineration plant steel structures and chemical anti-corrosion equipment frames.
Shipbuilding & Rail TransitSuperstructure load-bearing frames of vessels, high-speed railway station canopies and large-span station roof structures.
9. Packaging, Loading Port & Lead Time
Standard Export Seaworthy PackagingH beams of same specification & length stacked with wooden spacers to avoid flange collision deformation; cross steel strapping for reinforcement, metal corner guards fitted on both ends; full stacks loaded on wooden pallets, wrapped with inner VCI anti-rust film and outer blue waterproof woven cloth for moisture & rust prevention during sea transportation.
Loading Port: Tianjin Port, shipment available via Qingdao Port and Shanghai Port.
Lead Time
Regular stock Q235B HW/HN hot rolled H beams: 5–7 days
Q355B/C/D high-strength seismic & bridge special H beams: 8–14 days
Hot-dip galvanized, custom extra-large welded H beams & thickened HP pile sections: 16–25 days
MOQ & SamplesMinimum order quantity 10 tons; 300mm test pieces provided free for tensile, low-temperature impact and bend testing.
10. Supporting Quality Assurance Documents
Complete set of original Chinese & English steel structure mill certificates:
Slab melting chemical composition analysis report
Mechanical test report (tensile, low-temperature impact, cold bend)
Dimensional tolerance & surface straightness inspection data sheet
GB/ASTM/EN factory certificate, steel structure material certificate, packing list, certificate of origin
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