QIDAMT · CARBON STEEL ANGLE
Q355B Carbon Steel Angle Bar – Low Alloy Equal Angle
Hot-rolled Q355B equal angle for steel structures, towers, frames, brackets and general fabrication.
Q355B carbon steel angle bar is a hot-rolled equal-angle section of low-alloy high-strength structural steel. It combines 355 MPa yield strength with good weldability, and is used where Q235 angle is too weak.
Key Advantages
High Strength
355 MPa yield, supports heavier loads.
Weldable
Easy welding for trusses and frames.
Wide Sizes
20×20 to 200×200 mm equal angle.
Cost Effective
Cheaper than stainless or alloy angles.
Chemical Composition (Q355B)
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Content % | ≤ 0.24 | ≤ 0.55 | 1.00 – 1.60 | ≤ 0.035 | ≤ 0.035 |
Mechanical Properties
- Tensile strength (σb): 470 – 630 MPa
- Yield strength (σs): ≥ 355 MPa
- Elongation (δ): ≥ 21 %
- Impact (Charpy V): ≥ 34 J at +20 °C
Standard Sizes (Equal Angle)
| Parameter | Range |
|---|---|
| Size (leg × leg) | 20×20 – 200×200 mm |
| Thickness | 3 – 24 mm |
| Length | 6 – 12 m (cut to length) |
| Surface | Black / rust-proof painted / galvanized |
| Standard | GB/T 1591 / GB/T 706 / ASTM A572 Gr.50 |
Applications
Q355B angle is used for steel structure frames, transmission towers, crane booms, brackets, fence posts, warehouse racking and building reinforcement. For general Q235B angle see our Q235B angle; for galvanized angle see galvanized angle.
Processing & Packaging
Cutting, drilling, punching and welding fabrication available. Angles are strapped in bundles on wooden pallets.
Request a Q355B angle quote
Send leg size, thickness, length and quantity — we confirm price within 24 hours.
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