EN S690QL steel is fine grained quenched and tempered steel. It is well known for its high strength, which shall owe to S690QL chemical composition. EN S690QL steel yield strength shall be not lower than 690 Mpa, and it is mainly used in a wide variety of engineering applications where strength is important.
EN S690QL chemical composition:
| Grade | C | Si | Mn | P | S | N | B | Cr |
| S690QL | 0.20 | 0.80 | 1.70 | 0.025 | 0.015 | 0.015 | 0.005 | 1.50 |
| Cu | Mo | Nb | Ni | Ti | V | Zr | ||
| 0.50 | 0.70 | 0.06 | 2.0 | 0.05 | 0.12 | 0.15 |
EN S690QL chemical composition shall be compliant with the standard EN 10025-6. With high standards of flexibility, good bending and welding properties, EN S690QL steel is specially used in structural purposes, such as cranes, critical structural components in building, pipes and gates in hydroelectric projects.
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