Q345 Carbon Steel Plate Manufacturer
Q345 Steel for Structural Fabrication and Heavy Equipment Manufacturing
Q345 Carbon Steel Plate is one of the most widely used low-alloy structural steels in construction, machinery manufacturing, transportation equipment, and industrial fabrication.
Unlike ordinary carbon steel, Q345 combines higher strength with good weldability and forming performance. This balance makes it a practical choice for large welded structures, engineering equipment, and load-bearing components where both strength and fabrication efficiency are important.
For many manufacturers, Q345 is not selected because it is the strongest steel available, but because it offers a reliable combination of strength, toughness, weldability, and cost control.
Product Specifications
| Item |
|
| Standard | GB/T 1591 |
| Available Grades | Q345B, Q345C, Q345D, Q345E |
| Thickness | 3 mm – 300 mm |
| Width | 1000 mm – 3500 mm |
| Length | Up to 12000 mm |
| Supply Condition | Hot Rolled, Normalized |
| Surface | Black Surface, Shot Blasted |
| Inspection | UT Testing, PMI, Third-Party Inspection |
| Packaging | Export Seaworthy Packing |
| Payment Terms | T/T, L/C |
| Trade Terms | EXW, FOB, CFR, CIF |
Mechanical Properties (Q345B)
| Property | Value |
| Yield Strength | ≥ 345 MPa |
| Tensile Strength | 470 - 630 MPa |
| Elongation | ≥ 21% |
| Impact Test | Available Depending on Grade |
Chemical Composition (Q345B)
| Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| Max (%) |
|
0.50 |
|
0.035 | 0.035 |
Why Do Buyers Choose Q345 Carbon Steel Plate?
Suitable for Large Welded Structures
Q345 is widely used for fabricated components that require extensive welding. Its balanced chemical composition helps maintain good weldability without sacrificing structural strength.
Better Performance in Thick Plate Applications
For equipment frames, machinery bases, lifting structures, and industrial platforms, thick plates are often required. Q345 is commonly selected because it offers dependable mechanical properties across a wide thickness range.
Multiple Toughness Grades Available
Different grades such as Q345C, Q345D, and Q345E provide impact toughness at different temperatures, allowing engineers to choose materials according to service conditions.
Applications
FAQ
Q: What is the difference between Q345B and Q345D?
A: The main difference is impact toughness testing temperature. Q345D provides better low-temperature performance.
Q: Is Q345 suitable for welding?
A: Yes. Q345 is widely used in welded structures and fabrication projects.
Q: Can thick Q345 plates be supplied?
A: Yes. Heavy thickness plates up to 300 mm can be supplied depending on project requirements.
Q: What inspection documents are available?
A: MTC, EN 10204 3.1 certificates, UT reports, and third-party inspection documents can be provided.
Q: Can plates be cut to size?
A: Yes. Flame cutting, plasma cutting, and custom processing services are available.
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