Products Description
The S690Q steel plates supplied by us are widely used by clients across various industries, ranging from conventional sectors such as sugar, paper, textile, dairy, and general engineering, to high-demand sectors like oil and gas, petrochemical, chemical and fertilizer, power generation, and nuclear industries.
With a minimum yield strength of 690 MPa and tensile strength ranging from 720 to 880 MPa, these plates provide excellent load-bearing capacity and durability for heavy-duty applications.
They are typically supplied in thicknesses from 20 mm to 100 mm, with Charpy V-notch impact energy ≥27 J at –40°C, ensuring reliable performance even in cold or high-stress environments.
S690Q steel's combination of high strength, weldability, and toughness makes it ideal for structural frames, pressure vessels, pipeline supports, turbine casings, and offshore platforms, allowing engineers to design lighter, stronger, and longer-lasting structures.
Chemical Composition
The chemical composition of S690Q plates and bolts is optimized for high strength and weldability, as per EN 10025-6:2004 (maximum percentages):
| Element | C | Si | Mn | P | S | Cr | Mo | Ni | V | Nb | Ti | Cu | N | B | Zr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max % | 0.20 | 0.80 | 1.70 | 0.025 | 0.015 | 1.50 | 0.70 | 2.00 | 0.12 | 0.06 | 0.05 | 0.50 | 0.015 | 0.005 | 0.15 |
Mechanical Properties of EN 10025-6 S690Q Strength Steel
| Property | Value | Description |
|---|---|---|
| Yield Strength | ≥690 MPa (8-50mm) | Supports high-load applications |
| Tensile Strength | 770-940 MPa | Ensures durability under extreme stresses |
| Elongation | ≥14% | Provides ductility for forming and fastening |
| Impact Toughness | ≥30 J at -20°C (longitudinal) | Reliable performance in cold conditions |
| Hardness | ~250-300 HB | Quenched and tempered for enhanced durability |
Applications of EN 10025-6 S690Q
S690Q steel plates and bolts are widely used in high-strength structural applications due to their minimum yield strength of 690 MPa and tensile strength of 720–880 MPa, providing excellent load-bearing capacity and toughness.
Construction: Bridges, high-rise buildings, and stadiums.
Plates are typically 20–80 mm thick and can support axial loads exceeding 1000 kN, while bolts ensure structural integrity under dynamic and seismic loads.
Heavy Machinery: Mining equipment, cranes, and excavators.
Components withstand tensile loads up to 880 MPa, with Brinell hardness around 250–310 HB, resisting wear and heavy impact during operation.
Infrastructure: Offshore platforms, wind turbine towers, and tunnels.
S690Q steel maintains Charpy V-notch impact energy ≥27 J at –40°C, providing reliability under cold temperatures and harsh environmental conditions.
Energy Sector: Hydropower plants and pressure vessels.
Plates and bolts can tolerate high internal pressures and cyclic loading, ensuring safe long-term performance in high-stress applications.
