Wuxi Jin Ming Jian De Industry & Trade Co., Ltd. is one of the leading manufacturers and suppliers of q345b carbon steel sheet/plate in China. If you're going to wholesale the newest q345b carbon steel sheet/plate made in China, welcome to get pricelist from our factory. All customized products are with high quality and competitive price.
Q345B Steel is a widely used low alloy high-strength structural steel under the Chinese GB/T 1591 standard. It offers higher strength, excellent weldability, and good toughness, making it suitable for structural engineering, machinery manufacturing, bridges, pressure equipment, and heavy-duty fabrication.
Compared with Q235 steel, Q345B provides better mechanical strength and load-bearing capacity, while maintaining good welding and processing performance.
The "B" in Q345B indicates that the steel has impact toughness requirements at 20°C (room temperature), providing more reliable performance for engineering applications.
Chemical Composition of Q345B Steel:
|
Element |
Content (%) |
|
Carbon (C) |
≤ 0.20 |
|
Silicon (Si) |
≤ 0.50 |
|
Manganese (Mn) |
1.00–1.60 |
|
Phosphorus (P) |
≤ 0.035 |
|
Sulfur (S) |
≤ 0.035 |
Mechanical Properties:
|
Property |
Value |
|
Yield Strength |
≥ 345 MPa |
|
Tensile Strength |
470–630 MPa |
|
Elongation |
≥ 21% |
|
Impact Test |
20°C |
Advantages of Q345B Steel Sheet / Plate
- Higher strength than Q235 steel
- Excellent weldability
- Good low-temperature toughness
- Strong load-bearing performance
- Suitable for heavy structural use
- Cost-effective engineering material
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