Product Overview
Q235B H Beams are high-quality low-carbon structural steel beams manufactured according to the Chinese GB/T700 standard. Q235 is a plain carbon structural steel widely used across China, also classified as Q235A, Q235B, Q235C, and Q235D.
The "Q" represents yield point, and "235" indicates the yield strength. Q235B is known for good plasticity, weldability, and overall mechanical performance, making it ideal for engineering and construction applications.
Q235B H Beams are commonly used in buildings, bridges, towers, boilers, containers, and vehicles, as well as machinery components like brackets, rods, and supports.
Q235 Equivalent Materials
Q235 steel can be substituted with equivalent standards such as:
A36 (USA, ASTM)
SS400 (Japan/Vietnam, JIS)
These equivalences allow flexible material selection when specific regional standards are required.
Physical Properties of Q235
| Property | Metric | US/Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Compressive Yield Strength | 152 MPa | 22000 psi |
| Bulk Modulus | 160 GPa | 23200 ksi |
| Poisson's Ratio | 0.26 | 0.26 |
| Shear Modulus | 79.3 GPa | 11500 ksi |
Mechanical Properties
| Property | Metric | US/Imperial |
|---|---|---|
| Tensile Strength, Yield | 250 MPa | – |
| Tensile Strength, Ultimate | 400–550 MPa | – |
| Elongation at Break | 20–23% | 20–23% |
These properties ensure that Q235B H Beams maintain structural integrity under heavy loads while remaining flexible enough for welding and fabrication.
Chemical Composition of Q235B Steel
| Element | Max % |
|---|---|
| Carbon (C) | 0.20 |
| Silicon (Si) | 0.35 |
| Manganese (Mn) | 1.4 |
| Phosphorus (P) | 0.045 |
| Sulfur (S) | 0.045 |
The composition ensures a balance of strength, plasticity, and durability for versatile applications.
Specifications of Q235B H Beams
Height (H): 100–900 mm
Flange Width (B): 100–300 mm
Web Thickness (t1): 6–16 mm
Flange Thickness (t2): 8–28 mm
Length: 6–12 m (customizable)
Key Advantages
High Strength and Durability
Tensile strength: 400–550 MPa, yield strength: 250 MPa, ensuring that Q235B H Beams can handle high structural loads in buildings and bridges.
Can support frameworks up to several hundred tons, depending on beam size and configuration.
Excellent Weldability and Fabrication
Carbon content ≤ 0.20% allows for easy welding, cutting, and cold bending without cracking.
Suitable for fabrication into H-beams, I-beams, angles, channels, and other steel profiles.
Outstanding Plasticity
Elongation at break: 20–23%, providing flexibility for complex structural shapes.
Maintains integrity under cold bending and high-stress conditions.
Versatile Applications
Widely used in construction, bridges, towers, containers, machinery, and vehicles.
Can withstand outdoor environmental exposure, including moderate rain, humidity, and industrial conditions.
Cost-Effective
Durable steel reduces maintenance frequency and costs by up to 30% compared with lower-grade materials.
Long service life supports projects requiring high reliability and minimal replacement.
Applications
Structural frameworks for factories, warehouses, and commercial buildings
Beam spans up to 12 m supported with standard Q235B H Beams.
Flange width: 100–300 mm, height: 100–900 mm, allowing large-scale industrial structures.
Bridges, towers, and civil infrastructure
Suitable for medium to heavy-load bridges; supports tensile stress up to 550 MPa.
Machinery components such as brackets, rods, and supports
Can handle mechanical stress without deformation due to yield strength ≥ 250 MPa.
Vehicles, containers, and heavy equipment structures
Resistant to vibration and impact loads; maintains stability for large containers or truck frames.
