Q355B Hot-Rolled H-Beam with High Structural Strength, Flexible Design, and

Product Specification

Q355B hot-rolled H-beams are a type of high-strength, low-alloy structural steel with a minimum yield strength of 355 MPa. Due to their excellent load-bearing capacity, durability, and the ability to save 10-15% of material compared to I-beams, they are widely used in building beams and columns.

Q355B Hot-Rolled H-Beam is an economical section steel with an optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. Named for its "H" shaped cross-section, the inner and outer flanges are parallel, making the connection of components more convenient than traditional I-beams.

• Material Grade: Q355B (Low Alloy High Strength Steel)

• Production Process: Hot-Rolled

• Standard: GB/T 11263-2017 / JIS G3101 / ASTM A572

• Finish: Black (Bare), Primed, or Hot-Dip Galvanized

Technical Specifications & Dimensions

Chemical Composition (Typical Q355B)

• C: ≤0.20% | Mn: 1.20-1.60% | Si: ≤0.50% | P: ≤0.030% | S: ≤0.030%

Key Advantages of Q355b hot-rolled H-beams

1. High Structural Strength: Compared to I-beams, it has a larger section modulus, reducing metal weight by 10-15% under the same load conditions.
2. Flexible Design: Parallel flanges facilitate welding and bolting connections, significantly reducing assembly time and labor costs.
3. Superior Bending Performance: The H-shaped design provides excellent bending performance in all directions, making it ideal for high-rise buildings and long-span bridges.
4. Environmental Stability: Our Q355B steel exhibits excellent impact toughness even at low temperatures, ensuring safe use in various climatic conditions.

Primary Applications

Our H-beams are used in critical load-bearing structures across various industries:

• Industrial Architecture: Steel structure workshops, warehouses, and plant frames.

• Infrastructure: Bridges, highways, and railway brackets.

• Energy Sector: Oil drilling platforms and wind turbine support structures.

• Civil Engineering: High-rise buildings, underground subway support, and parking garages.

• Equipment Manufacturing: Base frames for heavy machinery and vehicle chassis.

Quality Control & Standards

We strictly adhere to national and international quality benchmarks:

• Raw Material Inspection: Every batch of billet is tested for chemical purity.

• Dimensional Precision: Digital monitoring during the hot-rolling process to ensure flange parallelism.

• Ultrasonic Testing (Optional): Available for projects requiring zero internal defects.

• Certification: ISO 9001, CE, and Mill Test Certificates (MTC) provided with every shipment.

Packaging & Logistics

• Packing: Bundled with strong steel strips for sea/land transport.

• Protection: End-capping and anti-rust oil application upon request.

• Shipping: Experience in bulk vessel and container loading (20GP/40GP).

• Lead Time: 7-15 days for standard sizes; 20-30 days for custom orders.

FAQ 

Q: What is the difference between Q235B and Q355B?

A: Q355B has a higher yield strength (355MPa vs 235MPa), allowing for thinner sections to carry the same load, reducing overall structure weight.

Q: Can you provide third-party inspection (SGS/TUV)?

A: Yes, we welcome and facilitate third-party inspections to guarantee quality before shipment.

Q: Do you offer surface treatments?

A: Yes, we provide shot blasting (Sa2.5), painting, and hot-dip galvanizing services.