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Help CenterH Section Steel & H Beam，Q235B、Q355B、Q390、Q460、Q235NH、Q355NH、AH36、DH36
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1. Product Definition
H Beam, full name Hot Rolled H Section Steel, features standard H-shaped cross-section composed of two parallel equal-thickness flanges and vertical web integrally hot rolled. The inner and outer surfaces of flanges are flat with right-angle ends, convenient for bolting and welding assembly. It is the core load-bearing section for modern steel structures, divided into hot rolled H beam and welded H beam. With reasonable cross-section distribution, it owns superior bending, torsion and compression resistance compared with standard I-beam, lightweight and steel-saving, widely used for factory beams & columns, high-rise steel columns, bridges, equipment supports and foundation piles.
Domestic Standard: GB/T 11263-2024 Hot Rolled H and Cut T Section Steel. International Trade Standards: ASTM A992/A36, EN 10034, JIS G3192
2. Classification by Production Process
2.1 Hot Rolled H Beam (Mainstream Stock Product)
Integrally formed by universal hot rolling mill without welding seams, uniform internal grain, low internal stress and excellent fatigue resistance with stable dimensional tolerance. Divided into 4 series: HW wide flange, HM medium flange, HN narrow flange, HT thin wall, applicable for most construction, bridge and municipal projects.
2.2 Welded H Beam (For Custom Extra Large Sizes)
Formed by CNC cut steel plates and automatic submerged arc welding, customizable ultra-high, ultra-wide and extra thick non-standard cross sections to cover size limits of hot rolled products, for long-span factories, heavy equipment bases and large non-standard steel frames.
3. Four Series of Hot Rolled H Beam (GB/T 11263)
1. HW Wide Flange H Beam
Section height ≈ flange width, balanced section modulus in two directions, outstanding axial compression performance, mainly for steel columns and bearing piles.Model examples: HW100×100, HW200×200, HW400×400Application: High-rise steel columns, factory load-bearing columns, bridge pier columns, main photovoltaic support columns, foundation pile sections.
2. HM Medium Flange H Beam
Flange width accounts for about 2/3 of section height, balanced bending & compression capacity, universal for both beams and columns.Model examples: HM300×200, HM488×300Application: Multi-story factory frame beams & columns, medium-duty crane beams, load-bearing frames of equipment platforms.
3. HN Narrow Flange H Beam
Section height far exceeds flange width, superior uniaxial bending resistance, specially designed for bending components.Model examples: HN300×150, HN600×200, HN900×300Application: Main roof beams, floor beams, crane beams, long-span trusses, floor load-bearing beams.
4. HT Thin-Wall H Beam
Thin web & flange, light self-weight for lightweight structures.Model examples: HT100×50, HT150×75Application: Light steel workshops, curtain wall frames, indoor light supports, temporary prefab houses.
4. Main Material Grades
1. Carbon Steel H Beam (General Inland Projects)
Q235B / SS400 / S235JRMin yield ≥235MPa, good ductility and weldability with cost advantage, for dry inland factories, standard frames and light supports.
2. Low Alloy High Strength H Beam (Heavy Load, Low Temp & Coastal Main Grade)
Q355B/Q355C / S355JR / A572 Gr50 / A992Min yield ≥355MPa, qualified low-temperature impact test, superior load capacity and anti-deformation performance, for large factories, high-rise steel structures, bridges, coastal photovoltaic and wind power support frames.
3. Bridge Grade H Beam (Road & Sea Cross Bridges)
Q355q, Q370q, anti-fatigue and resistant to alternating vibration loads for long-term vehicle service.
4. Weathering H Beam (Long-Term Uncoated Outdoor Exposure)
Q355NQR, resist atmospheric, rain and salt fog corrosion, for open trestles, outdoor bridges and equipment supports to reduce later anti-corrosion maintenance.
5. Optional Surface Treatment
Hot Rolled Black Scale: Original rolling oxide surface, lowest cost, only for dry indoor use, on-site painting available for rust prevention.
Shot Blasting: Remove surface oxide scale for clean surface, suitable for paint and fire retardant coating.
Hot-Dip Galvanized H Beam: Fully immersed in molten zinc liquid with zinc coating weight 60–280g/㎡, long anti-corrosion service life, top choice for coastal, power and photovoltaic outdoor projects.
Anti-Rust Primer Coating: Short-term outdoor protection with lower cost than galvanizing.
6. Complete Specification Parameters
Section Height H: Hot rolled 100–1700mm; welded customized over 1700mm extra large section
Flange Width B: 50–500mm, divided into HW/HM/HN/HT standard series
Web Thickness t1: 5–36mm; Flange Thickness t2: 6–40mm
Standard Fixed Length: 6m, 9m, 12m; customizable cut-to-length from 1m to 18m, short offcuts available
Marking Format: Height × Width × Web Thickness × Flange Thickness, e.g. HN400×200×8×13
Theoretical Weight: Calculated by cross-section area × 7.85, national standard weight table for all models available
Dimensional Tolerance: Hot rolled complies with GB/T 11263 standard; high precision tolerance available for welded H beam upon request
7. Core Product Advantages
Superior Mechanical Performance & Steel SavingSymmetric full flat flanges save 15%–20% steel compared with I-beam under equal load capacity, lighter self-weight to reduce foundation load and overall project cost.
Stable Biaxial Performance & Anti-Lateral BucklingWide flanges greatly enhance lateral rigidity, small deflection under long-span and heavy load, eliminate lateral bending instability risk of beams & columns.
Convenient Machining & ConstructionFlat flanges without inclined slope, easy drilling, welding, splicing and cutting, high assembly efficiency for modular steel structures.
Full Graded Material CoverageCarbon steel, low alloy, bridge and weathering grades available, covering all scenarios from light-duty light steel workshops to sea-crossing bridges and super heavy high-rise steel structures.
Complete Anti-Corrosion SolutionsMultiple surface options including black scale, shot blasting, hot-dip galvanizing and primer coating, fit inland industrial zones and coastal high salt fog environments.
Full Complete Specification SystemAbundant standard hot rolled stock, customizable non-standard welded extra large sections, free cutting for any length.
8. Main Application Fields
Steel Structure WorkshopsLoad-bearing steel columns, main roof beams, crane beams, equipment platform frames, portal rigid frames and warehouse load-bearing skeletons for single & multi-story factories
High-Rise Building IndustryHigh-rise office & residential steel frames, encased steel columns, underground garage load-bearing beams & columns, main structures of super high-rise landmarks
Municipal & Bridge InfrastructureHighway bridges, pedestrian overpasses, sea-crossing bridge main girders, pier columns and bridge reinforcement load-bearing components
New Energy PV & Wind PowerMain support columns of large photovoltaic power stations, wind power tower matching load-bearing frames, main steel structures of energy storage power stations
Port & Offshore EngineeringWharf trestles, container yard load-bearing supports, simple offshore steel platforms (galvanized or weathering H beam recommended)
Machinery & Equipment SupportingLarge machine tool bases, mine equipment load-bearing frames, conveyor supports and heavy pressure vessel brackets
Lightweight Light Steel ConstructionPrefab houses, small warehouses, curtain wall frames, indoor partition light HT thin-wall H beams
9. Export Packing, Lead Time & Delivery Documents
PackingH beams of same specification stacked on wooden supports, fixed with multi-point steel strapping; model, grade and length marked on end faces; waterproof anti-rust film covered for sea transportation to avoid rusting during transit.
Lead TimeStandard in-stock hot rolled Q235B/Q355B H beam: 3–5 working daysCustom welded non-standard, galvanized, weathering and bridge grade H beam: 7–12 working days
Complete Delivery DocumentsMaterial Test Certificate (MTC), Tensile & Impact Mechanical Test Report, Dimensional Appearance Inspection Report, Factory Inspection Certificate, Spectral Chemical Composition Report
10. Key Acceptance Inspection & Selection Rules
Verify production process (hot rolled / welded), series HW/HM/HN/HT, material grade, cross-section dimension and surface treatment;
Visual inspection: Straight overall shape without twist, lateral bend or warping; no crack, scar or lamination on flanges; uniform galvanized coating without missing plating or peeling;
Dimensional recheck: Height, flange width, web & flange thickness and inner arc radius comply with GB/T 11263 tolerance limits;
Working Condition Matching Guide:
HN narrow flange for factory main beams and floor load-bearing structures; HW wide flange for factory columns and high-rise steel columns; HM medium flange for general frame beams & columns;
Q235B for dry inland factories; Q355B for large factories, bridges and coastal projects;
Q355NQR weathering H beam for long-term uncoated outdoor service; Q355q bridge grade for sea-crossing bridges.
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