Based in the heart of Kinshasa, Yoane Steel has established itself as a trusted partner for industries across the Congo, specializing in the supply of high-strength structural steel. We take pride in providing premium S690 QL sheets and plates, materials engineered to meet the most demanding projects. Our commitment is to support the nation’s growth by delivering products that combine exceptional durability with the reliability needed for critical infrastructure, ensuring our clients have a solid foundation for building a stronger future.
The S690 QL grade represents a significant advancement in steel technology, featuring a carefully balanced composition that includes elements like carbon, manganese, and micro-alloys. This precise recipe is what gives the material its remarkable mechanical properties, offering a minimum yield strength of 690 MPa. This means it can withstand immense forces without deforming, all while maintaining good toughness and weldability, making it a superior choice where both strength and safety are non-negotiable priorities.
Thickness : 5MM & Above
Width : 1500 – 3500mm
Length : 3000 – 18000mm
Grade : S690QL EN10137-2 EN10025-6:2004, A709-100, DILLIMAX 690, NAXTRA 70, WELDOX 700, E690, JFE HITEN 780LE, ALFORM 700
| Grade | C | Si | Mn | P | S | N | B | Cr | Cu | Mo | Nb* | Ni | Ti* | V* | Zr* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S690 QL | 0.20 | 0.80 | 1.70 | 0.025 | 0.015 | 0.015 | 0.0050 | 1.50 | 0.50 | 0.70 | 0.06 | 2.0 | 0.05 | 0.12 | 0.15 |
| Designation | Mechanical Properties (ambient temperature) | |||||||
|---|---|---|---|---|---|---|---|---|
| Steel Name | Steel Number | Min. Yield Strength Reh MPa | Tensile Strength Rm MPa | Min. % elongation after fracture | ||||
| Nominal thickness (mm) | Nominal thickness (mm) | |||||||
| ≥3 ≤50 | ≥50 ≤100 | ≥100 ≤150 | ≥3 ≤50 | ≥50 ≤100 | ≥100 ≤150 | |||
| S690 QL | 1.8931 | 690 | 650 | 630 | 770/940 | 760/930 | 710/900 | 14 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
The exceptional strength-to-weight ratio of S690 QL sheets makes them ideal for ambitious construction and heavy machinery. You’ll find this material at the core of towering crane booms, the frames of powerful mining equipment, and supporting the vast spans of modern bridges. It’s also essential for building robust chassis for heavy-duty vehicles and in the construction of high-capacity storage tanks, allowing engineers to design lighter, more efficient structures without ever compromising on safety or performance under extreme loads.
Yoane Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Kinshasa, Congo.
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