S690
S690 is a high yield structural steel designed for applications requiring exceptional strength, toughness, and weldability. With a minimum yield strength of 690 MPa (100,000 psi), it offers excellent weight-to-strength efficiency for large, load-bearing structures. Available in plate, sheet, coil, and strip form, S690 delivers reliable performance in critical fabrication environments where strength, safety, and structural integrity cannot be compromised. Its combination of high yield strength and good formability allows for reduced section thickness—supporting designs that require lighter, stronger components without sacrificing durability.
Grades Designations
S690 is supplied in accordance with EN 10025-6, the European standard for high-strength structural steels. Its composition typically includes a low carbon content (≤ 0.20%) with controlled additions of manganese, chromium, nickel, molybdenum, and micro-alloying elements such as niobium and vanadium.
S690 Characteristics
Property
specification
Weldability
S690 exhibits excellent weldability with all conventional welding methods.
Thermal Cutting
S690 responds well to laser, plasma, and oxy-fuel cutting.
Bendability
S690 provides good cold formability relative to its strength class.
Ease of Fabrication
Despite its strength, S690 can be machined and fabricated using standard industrial processes.
S690 is commonly used in heavy-duty structural and fabrication projects where strength-to-weight performance is critical, including:
- Construction and infrastructure projects
- Crane and lifting equipment fabrication
- Mining and earthmoving machinery
- Offshore and energy structures
- Heavy industrial components
