S690 High Strength Structural Steel Plate
S690 is a high-strength, low-alloy structural steel grade with a minimum yield strength of 690 MPa. It is designed for heavy-load structures such as cranes, bridges, and high-rise buildings where high strength-to-weight ratio and excellent weldability are essential.
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High Strength-to-Weight Ratio – Ensures lighter structures without compromising load-bearing capacity.
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Good Weldability and Formability – Suitable for modern fabrication processes.
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Excellent Toughness – Performs reliably in low-temperature applications.
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Reduced Material Cost – Higher yield strength allows thinner plates for the same performance.
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Complies with EN 10025-6 Standard – Ensures consistency and mechanical reliability.
S690 Steel Description
S690 structural steel plates are produced using advanced quenching and tempering processes that enhance both strength and toughness. These plates maintain excellent surface quality and uniform mechanical properties through the entire thickness. They are widely used for engineering structures where high load-bearing capacity and reduced structural weight are essential.
S690 Technical Data Sheet
| S690 Chemical Composition | ||||||||||
| Element | C | Si | Mn | P (max) | S (max) | Cr | Ni | Mo | V | Nb |
| S690 | ≤ 0.20 | ≤ 0.80 | ≤ 1.70 | 0.025 | 0.015 | ≤ 1.50 | ≤ 2.00 | ≤ 0.70 | ≤ 0.12 | ≤ 0.06 |
| S690 Mechanical Properties | ||
| Property | Unit | Typical Value |
| Yield Strength (min.) | MPa | 690 |
| Tensile Strength | MPa | 770 – 940 |
| Elongation (min.) | % | 14 – 17 |
| Impact Energy (at -40°C) | J | ≥ 40 |
| Delivery Condition | — | Quenched and Tempered |
| Standard | — | EN 10025-6 |
S690 Steel Applications
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Heavy machinery and mining equipment
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Cranes and lifting structures
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Offshore platforms and wind towers
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Bridge construction and high-rise buildings
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Pressure vessels and structural frames
