S690QL High Strength Plates

S690QL is a high-strength quenched and tempered fine-grained structural steel plate. Here’s an overview of S690QL high-strength plates:

1. **Material Composition**: S690QL steel typically contains carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, and sometimes boron. These alloying elements contribute to its high strength and toughness.

2. **Properties**:

   - **High Yield Strength**: S690QL plates have a minimum yield strength of 690 MPa (100 ksi) or higher, depending on the thickness.

   - **Excellent Toughness**: It offers good toughness at low temperatures and high resistance to brittle fracture.

   - **Good Weldability**: Despite its high strength, S690QL plates are weldable using standard welding methods, although preheating and controlled heat input may be necessary.

   - **High Abrasion Resistance**: It provides excellent resistance to abrasion, wear, and impact, making it suitable for applications in harsh environments.

3. **Applications**:

   - **Heavy Machinery**: S690QL plates are commonly used in the construction of heavy machinery and equipment such as cranes, dump trucks, excavators, and agricultural machinery.

   - **Mining and Quarrying**: They find applications in mining and quarrying equipment subjected to high stress and wear conditions.

   - **Structural Components**: S690QL plates are used in structural components for bridges, offshore structures, and building construction where high strength and lightweight are advantageous.

   - **Transportation**: They are also used in transportation equipment for components like trailers and chassis.

4. **Standards**: S690QL steel plates are typically supplied according to EN 10025-6 standard, which specifies technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition.

In summary, S690QL high-strength plates are advanced structural steel plates known for their high yield strength, toughness, and resistance to abrasion and impact. They are utilized in various industries requiring components that can withstand heavy loads and harsh operating conditions while maintaining structural integrity and safety.