Hot-rolled Q355B steel plate is a high-strength low-alloy (HSLA) structural steel widely utilized in the manufacturing of heavy-duty mining machinery and engineering equipment. Highly favored for its high yield strength (minimum 355 MPa), excellent weldability, and exceptional toughness, this steel plate serves as an ideal material choice for various types of machinery and equipment operating in harsh environments.
Chemical Composition of Q355B Steel Plate
| Material | C | Si | Mn | P | S | Cr. | Ni | Cu | N |
| Q355B | ≤0.20% | ≤0.55% | ≤1.60% | ≤0.030% | ≤0.030% | ≤0.30% | ≤0.30% | ≤0.40% | ≤0.012% |
Mechanical Properties of Q355B Steel Plate
| Property | Typical Value/Range (Metric) |
|---|---|
| Yield Strength (0.2% offset) | 355 MPa (Min) |
| Tensile Strength | 470 - 630 MPa |
| Elongation | ≥ 20% |
| Impact Strength (Charpy) | ≥ 27 J |
| Impact Test Temp | +20°C |
Why Choose Q355B Steel Plate for Mining Machinery?
High Strength-to-Weight Ratio: With a minimum yield strength reaching 355 MPa, it enables the fabrication of components that are simultaneously stronger and lighter. This significantly enhances both the payload capacity and fuel efficiency of mobile mining equipment.
Exceptional Toughness and Impact Resistance: At ambient temperatures (e.g., 20°C≥ 27J), Q355B demonstrates superior impact resistance, effectively preventing brittle fracture under high-impact operating conditions.
Excellent Weldability and Machinability: Its favorable welding characteristics simplify the manufacturing processes for complex, heavy-duty structures, thereby ensuring structural integrity while effectively minimizing the incidence of production defects.
High Cost-Effectiveness: While delivering exceptional performance, its cost remains significantly lower than that of higher-strength alloy steels, making it an economical, reliable, and ideal choice for the heavy machinery manufacturing sector.
Durability in Harsh Environments: Q355B maintains stable mechanical properties even under heavy-load operating conditions, making it the ideal material for meeting the long-term operational demands of rigorous mining environments.
Applications of Q355B Steel Plate In Mining Machinery
1. Structural Components for Heavy Earthmoving Machinery
Large Excavators and Loaders: Used for manufacturing structural components such as booms, dipper sticks, and chassis.
Mining Dump Trucks: Used for manufacturing frames and cargo bodies.
Drilling Equipment: Used for manufacturing structural supports and masts that require exceptionally high structural integrity.
2. Underground and Open-Pit Mining Machinery
Hydraulic Supports (Coal Mines): Q355B steel is used to manufacture their structural components.
Mining Cranes: Used for manufacturing boom structures, columns, and other hoisting mechanisms that demand extreme durability.
Conveying Equipment: Applied in the manufacturing of conveyors and the frames of heavy-duty transport machinery.
Apron Feeder Frames: Used for manufacturing the structural framework, though typically not used for manufacturing the high-wear liner plates themselves.
Why Choose Us?
Professional Design Team:We can create design drawings tailored to your specific requirements, or calculate the necessary steel quantities based on the drawings you provide.
Skilled Fabrication Team and Advanced Production Equipment:We formulate a unique production plan for every project to ensure efficient and orderly progress.
One-Stop Service:Leveraging our extensive experience in executing similar projects, we provide comprehensive, integrated solutions that cover every aspect of your project.
Professional Quality Control Team:We maintain strict quality control standards to ensure that the products and services we deliver fully meet all your specifications.
Comprehensive After-Sales Service:Should you encounter any issues requiring assistance while using our products, simply let us know; we are dedicated to providing you with the highest quality after-sales support.
Contact now to get Q355B steel plate
| Type | Q355B |
| Standard | AISI, ASTM, BS, GB, DIN, JIS, etc |
| Certificate | ISO,SGS,CE |
| Length |
Production according to customer requirements |
| Thickness | 8-160MM |
| Width | 2000-2500MM |
| Surface | Coated |
| Technique | Hot rolled |
| Package | Available on request or Standard Export Packing |
| Application | Widely used in Building Construction, Bridge, Architecture, Vehicles Components,hipping,High pressure container, Boiler, Large Structure steel etc. |
What is the difference between Q355B and Q355C?
Q355C steel has an increased carbon content, usually ranging from 0.18% to 0.22%. This variant provides improved strength and hardness compared to Q355B. Q355C is often utilized in applications that require higher load-bearing capacity, such as heavy machinery, cranes, and offshore structures.
What is the hardness of Q355B material?
Q355B round steel hardness is 85-95 HRB. Q355B steel is a low-alloy high-strength structural steel, widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc.
What is the density of Q355B steel?
Q355 steel is a Chinese structural steel, material density: 7.85 g/cm3.
What is Q355B steel?
Q355B material is a low-alloy high-strength structural steel, where "Q" means yield strength, 355 means that the yield strength of this steel is 355MPa, and its yield value will decrease as the thickness of the material increases.