Q390C Strength Steel
Products Description Application Fields 1. Construction Engineering High-rise Steel Structures : Used in trusses and grid structures of large-span venues (e.g., stadiums, convention centers). Industrial Factories : Applied to crane beams and load-bearing columns, especially in heavy-duty...
Description
Products Description
Application Fields
1. Construction Engineering
High-rise Steel Structures: Used in trusses and grid structures of large-span venues (e.g., stadiums, convention centers).
Industrial Factories: Applied to crane beams and load-bearing columns, especially in heavy-duty workshops with high load requirements.
2. Bridge Engineering
Key Load-bearing Components: Used for main girders and piers in railway and highway bridges, capable of withstanding vehicle loads and vibration impacts.
Low-temperature Environments: Suitable for cross-sea/river bridges in cold regions (e.g., northern China), with impact resistance at 0℃.
3. Machinery and Equipment Manufacturing
Heavy Machinery: Used in structural components like crane booms, excavator chassis, and wear-resistant parts for mining equipment.
Pressure Vessels and Boilers: Meets special standard requirements for high-strength applications in industrial equipment.
Vehicles: Applied to train carriages and heavy truck frames to reduce weight while improving load capacity.
Comparison with Other Grades
| Grade | Yield Strength (MPa) | Impact Temperature (℃) | Typical Applications |
|---|---|---|---|
| Q345B | ≥345 | +20℃ | General steel structures (bridges, factories) |
| Q390C | ≥390 | 0℃ | High-load and low-temperature environments (northern construction, heavy machinery) |
| Q460D | ≥460 | -20℃ | Ultra-high-strength structures (large-span venues, UHV equipment) |
Precautions
1. Welding Technology
Surface Preparation: Clean oil, grease, and rust before welding.
Preheating: For thick plates, preheat to 80–120℃ to avoid cracking, depending on plate thickness and welding materials.
2. Low-Temperature Use
While suitable for 0℃ impact resistance, select higher grades (e.g., Q390D/E) for extreme cold environments (＜-20℃).
3. Inspection Standards
Verify quality certificates during procurement, focusing on chemical composition, mechanical properties, and impact test reports.
Q390C high-strength steel plays a critical role in modern engineering, excelling in scenarios requiring high strength, toughness, and moderate low-temperature adaptability. For specific technical parameters or supplier information, refer to GB/T 1591-2018 or consult steel suppliers.
Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our Q390C High Strength Steel, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.
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