Structural Steel H-Beam (Wide Flange) 

High Strength Structural Steel H-Beam | ASTM A992 / A572-50 / Q355B | HW HM HN Hot Rolled Wide Flange H-Section for Construction - [SONGCHENSTEEL]

01. Product Overview

Our Structural Steel H-Beam, also known as a Wide Flange beam, is a high-efficiency hot-rolled profile engineered for maximum load-bearing performance with minimal material weight. Distinguished by its wide, parallel flanges and optimized web depth, the H-beam design places more steel mass farther from the neutral axis — resulting in a moment of inertia and section modulus far superior to traditional I-beams of equivalent weight.

Available in three standardized series — HW (Wide Flange), HM (Medium Flange), and HN (Narrow Flange) — our H-beams provide the precise cross-sectional profile for every structural role, from high-rise columns resisting compression to long-span girders carrying distributed floor loads. With grades spanning Q235B general structural steel to ASTM A992 and Q355B high-strength low-alloy grades, we deliver the toughness, weldability, and dimensional accuracy required by global building codes.

02. Key Features & Advantages

l  Superior Section Efficiency

Ø  Feature: Optimized H-shape geometry with wide, parallel flanges distributing steel area far from the neutral bending axis.

Ø  Advantage: Significantly higher moment of inertia and section modulus per kilogram compared to standard rolled I-beams of identical depth.

Ø  Benefit: "Lighter Structures, Lower Cost." Engineers can design longer clear spans and taller column heights while reducing total steel consumption by 15-25%, directly lowering foundation loads and material budgets.

l  Three-Series Precision Grading

Ø  Feature: Available in HW (H=B, ideal for columns), HM (H:B≈1:0.67, general purpose), and HN (H:B≈1:0.33, optimized for beams).

Ø  Advantage: Each series is purpose-engineered — HW resists buckling under compressive axial loads, HN maximizes flexural stiffness for gravity loads, and HM bridges both roles.

Ø  Benefit: "Right Profile, Right Performance." Eliminates the compromise of using a single beam shape for all structural roles, ensuring neither under-design nor costly over-engineering.

l  Seamless Connection Geometry

Ø  Feature: Parallel inner and outer flange surfaces with right-angle junction to the web, and standardized bolt-hole gauge lines.

Ø  Advantage: Eliminates the need for tapered washers, simplifies stiffener fabrication, and enables direct beam-to-column bolted connections without shimming.

Ø  Benefit: "Faster Erection." Reduces on-site fitting and welding labor by up to 20% compared to tapered-flange I-beams, accelerating structural steel erection schedules.

l  Certified Toughness & Weldability

Ø  Feature: ASTM A992 and Q355B grades with controlled carbon equivalent (CE ≤0.45%), low sulfur/phosphorus, and guaranteed Charpy V-notch impact values at specified temperatures.

Ø  Advantage: Prevents brittle fracture in seismic zones and cold-climate construction; enables high-heat-input welding without cold cracking when proper preheat protocols are followed.

Ø  Benefit: "Code Compliance, Globally." Meets AISC 360, Eurocode 3, and GB 50017 seismic design requirements, ensuring project acceptance by structural engineers and building authorities worldwide.

03. Technical Specifications

04. Versatile Applications

l  High-Rise Buildings & Skyscrapers

HW and HM series H-beams form the primary skeletal framework for modern skyscrapers. Their high compressive strength and buckling resistance make them the column of choice, while HN beams span between cores as floor girders with minimal deflection. Dual-certified A992/A572-50 grades satisfy both AISC and international seismic design codes.

l  Heavy Industrial Plants & Warehouses

Large-span HN and HM beams (600-900mm web depth) support overhead crane runways and roof trusses in steel mills, automotive assembly plants, and logistics warehouses. The high section modulus allows column-free spans exceeding 30 meters, maximizing usable floor area for production lines and racking systems.

l  Bridges & Transportation Infrastructure

HM and HN H-beams serve as longitudinal girders and cross-beams in highway overpasses, pedestrian bridges, and railway platforms. A572-50 and Q355D grades with guaranteed -20°C Charpy impact toughness ensure reliable performance in cold-region bridge applications without brittle fracture risk.

l  Shipbuilding & Offshore Platforms

Heavy-section HW and HM beams (300-400mm) are used for the stiffened panel framework of ship hulls, deck support structures, and offshore platform topsides. Grades certified by classification societies (ABS, DNV, LR) are available for marine-grade applications requiring through-thickness Z-properties.

05. Why Choose Us?

1. Full HW / HM / HN Inventory

We stock the complete range of web heights from 100mm to 900mm across all three series in Q235B, Q355B, and A992 grades — no need to compromise on section selection due to supply constraints.

2. Multi-Standard Dual Certification

Single heat of H-beam can be dual-certified (e.g., A992 + A572-50, or S355J2 + Q355D), simplifying your international project compliance and reducing MTC documentation burden.

3. Seismic Code Compliance

A992 and Q355B grades are specifically formulated with controlled yield-to-tensile ratio (≤0.85 for A992), ensuring the ductile failure mode required by AISC 341 and GB 50011 seismic provisions.

4. In-House Processing

We provide saw cutting, drilling (CNC beam line), coping, welding of end plates, and surface preparation (shot blasting + primer) — beams arrive ready for direct erection.

5. Export Documentation Excellence

Dedicated team handles Form E / Form A / CO, 2026 steel export licensing, and port logistics from Tianjin / Shanghai, ensuring customs clearance within 24-48 hours.

06. Packaging & Logistics

l  Lead Time: 7-14 days for stock grades (Q235B/Q355B standard sizes); 20-30 days for custom mill rolling.

l  Loading Port: Tianjin / Shanghai / Qingdao.

l  Payment Terms: 30% T/T deposit + 70% against BL copy; or 100% Irrevocable L/C at sight.

l  Packaging: H-beams are bundled in max 5-ton lifts with steel strapping; timber dunnage separates layers to protect flange edges; lifting slings included for safe unloading. Galvanized beams receive additional waterproof wrapping.

l  Documentation: MTC (EN 10204 3.1) with full chemical and mechanical properties, packing list, commercial invoice, certificate of origin, and export license (2026-compliant).

07. FAQ

Q1: What is the difference between HW, HM, and HN H-beam series?

The three series are defined by their flange-to-web dimensional ratio and are engineered for distinct structural roles:

Ø  HW (Wide Flange): Height equals flange width (H=B). Maximum cross-sectional area and buckling resistance — the standard choice for primary columns and compression members.

Ø  HM (Medium Flange): Flange width is approximately 2/3 of height (B≈0.67H). Balanced bending and compression properties — used for both columns and beams in general construction.

Ø  HN (Narrow Flange): Flange width is approximately 1/3 of height (B≈0.33H). Optimized for flexure — the primary choice for floor beams, roof girders, and crane runways.

Rule of Thumb: Columns → HW; General purpose → HM; Beams → HN.

Q2: Is ASTM A992 the same as A572 Grade 50? Are they interchangeable?

ASTM A992 is a subset specification developed specifically for wide-flange shapes used in building frames. While it shares the same minimum yield strength (345 MPa / 50 ksi) and tensile strength (450 MPa / 65 ksi) as A572 Grade 50, A992 imposes additional requirements:

Ø  Maximum yield-to-tensile ratio ≤0.85

— ensuring ductile, non-brittle seismic behavior.

Ø  Maximum carbon equivalent (CE)

— guaranteeing consistent weldability.

For building frame applications governed by AISC 360, always specify A992. For general structural applications, A572-50 alone may be acceptable at a slightly broader chemistry range.

Q3: Can H-beams be welded? What preheat is required?

Yes, H-beams have excellent weldability due to their low carbon equivalent (typically ≤0.45% for A992/Q355B).

Ø  Recommended preheat and interpass temperatures depend on the grade and combined thickness:

Q235B / A36: No preheat required for thicknesses ≤40mm at ambient temperatures >0°C.

Q355B / A992 / A572-50: Preheat to 65-110°C for combined thicknesses of 20-40mm; 110-150°C for >40mm.

Ø  Always use low-hydrogen electrodes (AWS E7018 or equivalent) to prevent hydrogen-induced cold cracking.

Ø  Do NOT exceed 230°C interpass temperature for Q&T grades to avoid heat-affected zone softening.

Q4: What is the difference between a hot-rolled H-beam and a welded H-beam (built-up section)?

Ø  Hot-Rolled H-Beam:

Formed directly from a single billet through universal rolling mills. No weld seam; uniform residual stress distribution; better fatigue resistance. Standard sizes per GB/T 11263 or ASTM A6.

Ø  Welded (Built-Up) H-Beam:

Fabricated by welding three separate plates (one web + two flanges) together. Allows for non-standard sizes and higher web-to-flange ratios. However, the weld introduces a heat-affected zone with residual stresses; 100% UT inspection of the weld is mandatory for critical applications. We supply both types — hot-rolled for standard structural frames and welded for heavy plate girders exceeding 900mm web depth.

Q5: What surface treatments do you offer for H-beams?

Ø  Mill Finish (Black):

As-rolled surface with a thin oxide scale. Cost-effective for internal structural members or where the beam will be encased in concrete.

Ø  Shot Blasting + Shop Primer (Sa 2.5):

Removes mill scale and applies a weldable zinc-rich or epoxy shop primer. Recommended for exposed structural steel where site painting will follow.

Ø  Hot-Dip Galvanized (ISO 1461):

Zinc coating of 55-85μm for maximum corrosion protection. The standard choice for outdoor structures, coastal environments, and pedestrian bridges where maintenance access is limited.

Q6: How do you guarantee the straightness and dimensional tolerances of H-beams?

Every H-beam leaving our facility passes through a multi-roll straightening machine after the hot-rolling process to correct camber and sweep deviations. Tolerances are per ASTM A6 or EN 10034:

Ø  Straightness (Camber/Sweep): ≤ Length / 1000 (e.g., ≤12mm for a 12m beam).

Ø  Flange Out-of-Squareness: ≤ 1.5% of flange width.

Ø  Web Off-Center: ≤ 3mm. Pre-shipment dimensional inspection reports are available for projects requiring full documentation traceability.

Q7: Can you drill and cut H-beams to our fabrication drawings?

Yes, we operate a CNC beam drilling and cutting line that processes beams per your shop drawings (DXF / DWG / Tekla formats). Services include:

Ø  Saw cutting to exact length with ±2mm tolerance.

Ø  CNC drilling of bolt holes for beam-to-column connections.

Ø  Coping / notching of flanges for clearance at connections.

Ø  Welding of end plates, stiffeners, and shear tabs.

Each processed beam is marked with its drawing item number for fast on-site identification and erection. This significantly reduces the fabrication workload in your workshop or at the construction site.

Q8: What is the standard length of H-beams? How are they shipped?

Ø  Standard length: 12 meters (fits most 40ft flat rack containers or break bulk vessels).

Ø  Custom lengths: 6m (for 20ft containers), 9m, 13.5m, 15m — available on request.

Ø  Shipping method:

12m beams typically ship via 40ft flat rack containers or as break-bulk cargo on general cargo vessels for large project quantities (>100 tons). 6m beams fit standard 20ft GP containers for smaller trial orders.

Ø  Weight per container: A 40ft flat rack typically loads 25-28 tons of H-beams (limited by weight rating, not volume).

Q9: What is your MOQ? Do you keep stock of H-beams?

Ø  Standard grades and sizes(Q235B/Q355B, 100-400mm HW/HM/HN): Large inventory maintained; MOQ flexible, starting from 28 tons for mixed sizes.

Ø  Non-standard sizes or specialty grades(Q355D/A572-50/A992): Custom mill rolling requires MOQ of 100-200 tons per size due to dedicated roll tooling setup.

Ø  Mixed container loading

We can combine multiple H-beam sizes, channels, and angles in a single container to help smaller buyers meet logistics minimums. Contact our sales team with your BOM (bill of materials), and we can optimize the mix to minimize your total delivered cost.

Q10: Are your H-beams suitable for seismic (earthquake-resistant) design?

Yes. ASTM A992 was specifically developed for seismic building frame applications under AISC 341 (Seismic Provisions for Structural Steel Buildings). Key features that qualify it for seismic use:

Ø  Controlled yield-to-tensile ratio (≤0.85):

Ensures the steel yields significantly before fracturing, allowing the structure to dissipate seismic energy through plastic deformation rather than sudden brittle failure.

Ø  Guaranteed Charpy impact toughness:

Prevents crack propagation at beam-to-column moment connections under cyclic loading.

Ø  Tight chemistry control (C ≤ 0.23%, CE ≤ 0.45%):

Ensures consistent material behavior across all heats. For projects in high-seismicity zones (UBC Seismic Zone 3-4 or GB 50011 Category 8-9), always specify A992 or Q355B with supplementary impact testing requirements.

For inquiries, grade recommendations, or a detailed quotation, please contact our structural steel team.