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Help CenterSteel H Beam & H Section Steel，Q235B / S235JR / A36 / SS400、Q355B/C/D/E/ S355JR / A572 Gr50、Q355GJ、Q390GJ
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1. Product Overview
H section steel (H-beam) is hot rolled load-bearing section steel with H-shaped cross-section, two parallel flanges and right-angle flange ends, integrally formed by web and upper & lower flanges, different from ordinary I-beam with inclined flanges. Classified into four series: HW wide flange, HM medium flange, HN narrow flange and HT thin-wall light H-beam based on cross-section proportion. Manufactured by high-temperature rolling of carbon steel and HSLA billets, it features large section modulus, excellent bending & compression resistance and light self-weight. It can be used as building beams & columns, bridge main girders, equipment bases and pile load-bearing components, widely applied in prefabricated buildings, workshops, high-rise buildings, photovoltaic projects, municipal bridges and full steel structure projects. Compliant with domestic hot rolled section steel standards and mainstream European, American & Japanese export industrial standards, custom processing including fixed-length cutting, punching, welding and hot-dip galvanizing is available.
Applicable Standards
Domestic StandardsGB/T 11263-2024 Hot Rolled H and Cut T Section Steel, GB/T 700 Carbon Structural Steel, GB/T 1591 High Strength Low Alloy Structural Steel, GB/T 13912 Technical Specifications for Hot-Dip Galvanized Coatings, GB/T 714 Structural Steel for Bridges
International Export StandardsEN 10034, ASTM A6/A36/A572 Gr50, JIS G3192, ISO 630
2. Main Steel Grades & Application Conditions
Q235B / S235JR / A36 / SS400 (General Carbon Steel)Excellent plasticity and weldability with cost advantage, for light workshops, low-rise frames, equipment supports and indoor ordinary load-bearing beams & columns
Q355B/C/D/E / S355JR / A572 Gr50 (HSLA Steel)High yield strength and outstanding low-temperature impact toughness, for long-span workshops, high-rise steel structures, bridges, photovoltaic brackets and outdoor projects in severe cold areas
Q355GJ, Q390GJ Building Special SteelSuperior seismic performance, for main frames of high-rise office buildings, exhibition halls and large prefabricated buildings
Q235B Galvanizing SubstrateFully hot-dip galvanized, for coastal factories, chemical anti-corrosion workshops and open-air load-bearing structures
3. Four Series Classification of H Section Steel
HW Wide Flange H Section (Equal Width H-beam, H≈B)Flange width close to section height, balanced bidirectional bending resistance, mainly used for load-bearing columns, foundation piles and equipment bases, size range HW100×100～HW400×400
HM Medium Flange H Section (Medium Beam H-beam, H＞B)Height larger than flange width, dual-purpose for beams and columns, for medium workshop main beams and multi-story frame columns, size range HM150×100～HM600×300
HN Narrow Flange H Section (Dedicated Beam H-beam, H much larger than B)Web height far exceeds flange width, outstanding bending resistance, for workshop roof main beams, floor secondary beams and bridge cross girders, size range HN100×50～HN900×300
HT Thin-Wall Light H SectionThin web and thin flanges with light self-weight, for light workshops, steel structure enclosures, small supports and photovoltaic auxiliary beams
4. Complete Production Process
Hot Rolled H Section Main Process
Incoming flaw detection of steel billets → Uniform heating at 1100~1300℃ in stepping furnace → Multi-pass universal mill rolling to form H cross-section → Sizing, straightening & cooling → Segmented cutting to fixed length → Surface cleaning & full inspection of dimension & appearance → Marking & coding → Bundling with steel strips & warehousing
Galvanized H Section Process
Degreasing & oil removal of finished H section → Hydrochloric acid pickling for oxide scale removal → Water washing & neutralization → Flux dipping & wetting → Hot-dip galvanizing at 460~520℃ → High-pressure air knife to remove excess zinc → Passivation anti-rust treatment → Inspection & packing
5. Core Specification & Technical Parameters
Dimension Coverage RangeSection height H: 100mm～900mm; Flange width B: 50mm～400mm; Web thickness t1: 4mm～32mm; Flange thickness t2: 6mm～36mmMarking example: HN400×200×8×13 (Height 400mm, Width 200mm, Web thickness 8mm, Flange thickness 13mm)
Standard Fixed Length: 6m, 9m, 12m, 15m, customized cutting length 3–18m available
Dimensional ToleranceHeight, flange width, thickness and straightness strictly comply with national standards, straightness ≤1.5mm/m, controllable flange verticality deviation
Zinc Coating Index (Galvanized H Section)Average zinc coating thickness ≥85μm, coating weight ≥600g/㎡, pass neutral salt spray test ≥800h without peeling, missing plating or rust
Mechanical Performance
Q235B: Yield strength ≥235MPa, tensile strength 375~500MPa, no cracking after 180° cold bending
Q355B: Yield strength ≥355MPa, qualified impact test at -20℃, suitable for low-temperature outdoor and seismic projects
Surface OptionsHot rolled black finish, sandblasted rust removal, silver-gray full hot-dip galvanized surface
6. Core Product Advantages
Economical cross-section to reduce steel consumption & self-weightSymmetrical parallel flanges deliver much larger section modulus than I-beams, cutting steel consumption by 30%~40% under equal load, greatly lowering building self-weight and foundation cost.
Parallel right-angle flanges to boost construction efficiencyFully parallel inner & outer flanges, no extra groove grinding required for bolt & welding splicing, reducing welding and riveting workload by 25% and adapting to fast prefabricated construction.
Balanced bidirectional force with stable seismic performanceHW wide flange series features excellent bidirectional bending resistance, strong anti-lateral displacement and anti-overturning capacity for columns, higher safety factor for high-rise and long-span buildings.
Comprehensive machinability for all processing typesSuitable for flame cutting, plasma cutting, drilling, bending and welding, matching factory prefabrication and secondary on-site processing, can be combined with angle steel, channel steel and steel plates to form complete steel structure systems.
Complete anti-corrosion system for long outdoor service lifeHot-dip galvanizing provides cathodic protection via zinc layer to isolate moisture, acid & alkali soil corrosion, extending service life of open-air workshops in coastal and chemical plants.
Sufficient Stock & Stable Delivery CycleFull series of materials and specifications in stock, shipped directly from Tianjin Port, production & delivery cycle 5–7 days. One-stop custom processing including punching, beveling, galvanizing and fixed-length cutting available for bulk orders.
7. Main Application Fields
Industrial Workshop Steel Structure: Load-bearing columns, roof main beams, floor secondary beams, crane girders and equipment foundation supports
High-Rise Prefabricated Buildings: Main frame beams & columns of office buildings, residential buildings, exhibition centers and large shopping malls
New Energy Photovoltaic Engineering: Main columns of photovoltaic power stations, large photovoltaic support main beams and cold storage plant steel structures
Municipal Bridge & Transportation: Highway bridge main girders, bridge piers, pedestrian overpasses and tunnel support frames
Construction Machinery & Equipment: Large machine tool bases, lifting equipment supports and port machinery load-bearing components
Infrastructure Pile Engineering: H-section steel piles for building foundations and foundation pit support load-bearing piles
Warehousing & Logistics: Main frames of large three-dimensional warehouses, cold storage workshops and logistics park heavy-duty racks
8. Factory Inspection & Complete Qualification Documents
Full-item inspection for every piece per batch with complete export supporting documents attached:
Full dimensional inspection of section height, flange width, web/flange thickness, length and straightness appearance
Mechanical performance test including tensile, room/low-temperature impact and cold bending
Additional zinc coating thickness, adhesion and neutral salt spray anti-corrosion test for galvanized H section steel
Spectral chemical composition analysis to verify material grade
Original Mill Test Certificate EN 10204 3.1, factory certificate, SGS third-party inspection report, CE certification documents
9. Packaging, Marking & Logistics Delivery
Packaging: Same specifications bundled uniformly with multiple steel strips, metal corner protectors installed at both ends to avoid collision deformation; export goods fully wrapped with waterproof plastic film and fixed on wooden pallets for sea transportation moisture & rust resistance
Marking: Permanent printing on side of each bundle including material grade, model (H×B×t1×t2), length, heat number, execution standard and manufacturer information; product qualification label attached to each bundle
Delivery: Direct shipment from warehouse to Tianjin Port, suitable for 20GP/40HQ full containers and bulk carriers; delivery cycle 5–7 days, FOB/CIF/CFR trade terms acceptable, full container & LCL export supported
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