Hot-rolled structural H-beams feature wide parallel flanges and a perpendicular web forming an "H" section. Designed with equal or near-equal flange width and web depth, H-beams provide high section modulus along both the X-X and Y-Y axes. This optimized geometry offers high resistance to bending, torsion, and axial compression compared to standard I-beams.
Produced via continuous hot-rolling processes, these beams serve as primary load-bearing members in structural steel framing, heavy civil infrastructure, industrial plants, and equipment foundations.
Key Product Characteristics
High Bending & Buckling Resistance: Parallel flanges distribute cross-sectional area far from the neutral axis, delivering superior moment of inertia (Ix, Iy) and radius of gyration.
Uniform Wall Thickness Options: Available in wide flange (HW), middle flange (HM), and narrow flange (HN) series, optimized for either axial columns or flexural beams.
Structural Welding Compatibility: Low carbon equivalent values (CEV) ensure sound field and shop welding without preheating under standard ambient conditions.
Dimensional Consistency: Hot-rolling tolerances comply strictly with ASTM A6, EN 10034, and JIS G3192 standards for straightness, out-of-squareness, and camber/sweep.
Technical Specifications
Dimensional & Sectional Ranges
Section Height (H)
100 mm - 1000 mm (4 in - 40 in)
Flange Width (B)
50 mm - 400 mm (2 in - 16 in)
Web Thickness (t1)
4.5 mm - 26 mm
Flange Thickness (t2)
7 mm - 45 mm
Standard Lengths
6m, 9m, 12m, 14m (custom lengths up to 18m upon request)
Dimensional Tolerances (per EN 10034 / ASTM A6)
|
Parameter |
Permissible Deviation (Nominal Size Range) |
|
Section Height (H) |
±2.0 mm (H ≤ 200) to ±4.0 mm (H > 600) |
|
Flange Width (B) |
±2.0 mm (B ≤ 150) to ±4.0 mm (B > 300) |
|
Web Off-Center (e) |
Max 2.5 mm - 5.0 mm depending on flange width |
|
Out-of-Squareness (T+T') |
Max 1.5% of B (or up to 6.0 mm) |
|
Straightness (Camber/Sweep) |
≤0.15% of total length L |
Grades & Standards
Our mill supplies structural H-beams matching all major international design codes:
|
Region / Standard |
Steel Grade |
Yield Strength ReH (MPa, min) |
Tensile Strength Rm (MPa) |
Impact Test Energy (KV, min) |
|
American (ASTM) |
ASTM A36 |
≥250 |
400 - 550 |
Optional / Project specific |
|
ASTM A992 / A572 Gr 50 |
≥345 |
≥450 |
27 J at +20°C |
|
|
European (EN 10025-2) |
S235JR |
≥235 |
360 - 510 |
27 J at +20°C |
|
S275JR / S275J2 |
≥275 |
410 - 560 |
27 J at +20°C / -20°C |
|
|
S355JR / S355J2 / S355K2 |
≥355 |
470 - 630 |
27 J at +20°C / -20°C / 40 J at -20°C |
|
|
Japanese (JIS G3101/G3106) |
SS400 |
≥245 |
400 - 510 |
N/A |
|
SM490A / SM490YB |
≥325 |
490 - 610 |
27 J at 0°C |
Surface & Processing Options
Surface Preparation
As-Rolled (Black): Mill scale intact; suitable for basic indoor framing or secondary structures.
Shot Blasting: ISO 8501-1 Sa 2.5 finish for rust removal prior to coating application.
Protective Coatings
Hot-Dip Galvanizing (HDG): Conforming to ASTM A123 / ISO 1461. Zinc coating thickness ranges from 85 μm to 120 μm (610 - 850 g/m²) for severe outdoor atmospheric protection.
Shop Priming: Red oxide, zinc chromate, or epoxy primer coating (25 - 50 μm DFT).
Secondary Processing Services
Precision Saw Cutting: Length tolerance within -0 / +5 mm.
Fabrication & Drilling: Web and flange CNC drilling, slotting, end-beveling, and welded gusset plates according to structural shop drawings.
Applications
High-Rise & Commercial Framing: Primary structural columns and transfer girders where multi-directional stability is critical.
Industrial Facilities & Warehouses: Heavy crane beams, roof trusses, and mezzanine floor structures.
Bridges & Infrastructure: Main longitudinal girders, pier caps, and temporary shoring frames for highway and railway projects.
Foundation Piling: Wide-flange bearing piles (HP sections) for deep foundation support under axial compressive loads.
Heavy Machinery Foundations: Mounting frames for mining platforms, power plant boilers, and offshore structural skids.
Quality Control & Inspection
Every production heat undergoes mandatory chemical, mechanical, and non-destructive testing before shipment:
Chemical Composition Analysis: Spectrometric evaluation of C, Mn, Si, P, S, Cr, Ni, Cu, V, and Carbon Equivalent:
CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
Mechanical Property Testing: Tensile yield strength, ultimate tensile strength, elongation percentage, and Charpy V-notch impact testing down to -40°C.
Dimensional Verification: Laser/caliper inspection of web/flange thickness, section height, out-of-squareness, and camber.
Non-Destructive Testing (NDT): Ultrasonic testing (UT) per EN 10160 or ASTM A435 for internal lamination defects on thick flange sections (t2 ≥ 20 mm).
Certification: Issued mill test certificates (MTC) fully compliant with EN 10204 3.1 or 3.2. Third-party inspections (SGS, BV, Intertek, TUV) supported upon request.
Supply & Customization Options
Minimum Order Quantity (MOQ): 5 metric tons per single stock section size; 25 metric tons for non-standard rolling runs.
Length Customization: Fixed length cutting from 5.8m (for 20ft container loading) up to 12.0m (for 40ft container loading or breakbulk).
Packaging & Shipping:
- Steel-strapped bundle packaging with protective end caps.
- Anti-rust oil coating applied for sea freight transit.
- Containerized shipping (20GP/40GP/40HQ) or bulk vessel shipment for large tonnage orders.
What Buyers Should Provide for a Quote
To receive an accurate commercial quotation and technical feasibility review within 24 hours, submit the following details:
Standard & Steel Grade: (E.g., ASTM A992, EN 10025 S355J2, JIS SS400)
Section Designation / Dimensions: (E.g., HEB 200, W12x50, H300x300x10x15 mm)
Length Requirements & Tolerances: (E.g., Fixed 12,000 mm ±5 mm)
Surface Finish & Coating: (E.g., Bare mill scale, Sa 2.5 shot blast, or HDG to ASTM A123)
Total Quantity: Weight in metric tons or total piece count.
Delivery Terms & Destination: Incoterms (FOB, CFR, CIF) with target destination port.
Inspection / Certification Requirements: (E.g., EN 10204 3.1 MTC, third-party SGS inspection).
FAQ
Q: What is the main structural difference between an H-beam and an I-beam?
A: H-beams feature wider flanges with parallel inner and outer surfaces, giving them a square or near-square cross-section profile. This provides high section modulus along both axes (Ix and Iy). Standard I-beams have narrower flanges with a 1:10 inner slope, making them effective primarily for single-axis flexural bending rather than column compression.
Q: How do ASTM A36 and ASTM A992 compare for structural H-beams?
A: ASTM A992 is the standard steel grade for wide-flange H-beams in North America, offering a higher yield strength (minimum 50 ksi / 345 MPa) and a controlled maximum yield-to-tensile ratio (0.85) for seismic performance. ASTM A36 has a lower yield strength (minimum 36 ksi / 250 MPa) and is typically used for channel sections, angles, or plate fabrications.
Q: Can your H-beams be hot-dip galvanized without cracking or deformation?
A: Yes. The chemical composition-specifically silicon and phosphorus content-is strictly controlled to avoid the reactive Sandelin range (0.04% < Si < 0.14% or Si > 0.25% with high P). This prevents excessively thick, brittle zinc-iron alloy layers and ensures strong coating adhesion during galvanization.
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