S690QL
Thickness: (6-20mm) Width: (1500-2000mm) Length: (3000-12000mm)
General Product Description
S690QL is a type of structural steel that boasts exceptional strength after being quenched and tempered, making it ideal for rigorous applications, especially within the construction and engineering fields. It adheres to the EN 10025-6:2004 standard and is recognized for its superior mechanical properties, such as elevated yield strength and weldability.
The grade designation of S690QL are the following:
- S = Structural Steel
- 690 = minimum yield strength (MPa)
- Q = Quenching & Tempering
- L = Low notch toughness testing temperature
Mechanical Properties of S690QL
Chemical Composition of S690QL
Applications:
S690QL is extensively utilized in sectors that necessitate materials with a high strength-to-weight ratio, such as:
- Construction: For the fabrication of cranes, bridges, heavy machinery, and other load-bearing structural elements.
- Mining: In the manufacturing of mining equipment like excavators and bulldozers.
- Energy: For wind turbine towers and offshore structures.
- Shipbuilding: For crafting strong yet lightweight ship hulls and components.
Heat Treatment:
S690QL steel undergoes a heat treatment process that includes heating to a high temperature, followed by rapid cooling (quenching), and then tempering (reheating to a lower temperature and cooling). This process enhances the steel's strength and toughness.
- Quenching: Involves heating the steel to a specific temperature and then cooling it rapidly to increase hardness.
- Tempering: Adjusts the hardness and toughness to prevent the material from becoming overly brittle.
Weldability:
While S690QL is known for its good weldability, special considerations are required during welding due to its high strength. The process should employ low-hydrogen electrodes, and the material should be preheated and post-weld heat treated to reduce the risk of cracking.
Advantages of S690QL Steel:
- High Strength: S690QL provides exceptional strength, making it perfect for applications with heavy load-bearing requirements.
- Versatility: Its properties make it suitable for a variety of industries.
- Good Toughness: Despite its high strength, S690QL maintains excellent impact toughness at low temperatures.
- Good Weldability: With proper care, this material can be welded, making it appropriate for construction and structural applications.
Fabrication and Delivery Conditions
For these aspects, they depend on your specific requirements. Please contact us and we will provide you with professional advice and services.
Frequently asked questions
Do you keep large quantities in stock monthly?
Yes, we are Baosteel's long-term first-level dealer, always keeping a large amount of steel in stock, and give priority to ordering and scheduling production at Baosteel Group as well as Xingcheng Special Steel.
Can we visit your office and the warehouse?
Of course, we welcome you to visit our office and warehosue. We can also show you all all the production lines of steel mills we cooperated with to more about our capacity and quality.
Do you have quality control system?
We have ISO, BV, SGS certifications and cand conduct product performance testing based on customer requirements.
Can you provide steel processing services?
We have multiple warehouses with long-term agreements, able to provide high-quality processing and packaging services to meet your requirement.
What are the payment methods?
We accept T/T and L/C. For other payment methods, please contact us for further communication.
How long is your delivery time?
For goods in stock , it takes 3 to 7 days.If we need to order from steel mills, it will take around 25-45 days depends on the specific products and different steel mills.
How do you keep long-term business and good relationship?
We always keep supplying good quality products with competitive prices and provide one stop service.We wish to establish long-term cooperative relationships with you, to achieve the best interests and to become the true friends.