Naing Steel is proud to stand as a leading manufacturer and supplier in Naypyidaw, providing high-strength steel solutions that meet the demanding needs of modern construction and industry. We specialize in S690 QL sheets and plates, a premium grade of steel engineered for exceptional performance under significant stress. Our commitment is to support Myanmar’s growth by delivering materials that combine superior strength with reliability, ensuring your most ambitious projects are built on a foundation of proven quality and local expertise.
The S690 QL grade is defined by its precise chemical composition, which is carefully balanced to achieve a minimum yield strength of 690 MPa. This high-strength, low-alloy (HSLA) steel is quenched and tempered, a process that gives it an outstanding strength-to-weight ratio along with excellent toughness. These properties mean structures can be both stronger and lighter, offering significant advantages in design and efficiency without compromising on safety or durability in challenging environments.
Thickness :Â 5MM & Above
Width : 1500 – 3500mm
Length : 3000 – 18000mm
Grade :Â 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 of S690 QL sheets and plates makes them the material of choice for critical, heavy-duty applications. They are ideally suited for constructing the frameworks of high-rise buildings, long-span bridges, and robust industrial machinery. In the mining and quarrying sectors, this steel is used for equipment that must withstand immense wear and impact. Furthermore, it is essential for fabricating crane booms, heavy transport vehicles, and other components where reducing weight while maximizing load-bearing capacity is a primary engineering goal.
Naing 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 Naypyidaw, Myanmar.
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