P690QL2 is a high-strength alloy steel plate designed for pressure vessels, boilers, storage tanks, and industrial pressure equipment. Supplied in the quenched and tempered condition, it provides high yield and tensile strength together with excellent impact toughness, making it suitable for demanding pressure-containing applications.
The grade is widely used in power generation, petrochemical, oil & gas, chemical processing, and heavy industrial equipment where high mechanical strength and reliable performance are required. P690QL2 is particularly suited to applications requiring enhanced low-temperature impact toughness.
Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | V | Nb | Ti | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | 0.20 | 0.80 | 1.70 | 0.025 | 0.015 | 1.50 | 2.00 | 0.70 | 0.50 | 0.12 | 0.06 | 0.05 | 0.015 |
| Property | Yield Strength | Tensile Strength | Elongation | Impact Toughness | Hardness |
|---|---|---|---|---|---|
| Min | 690 MPa | 770 MPa | 14% | 27 J @ -20°C | - |
| Max | - | 940 MPa | - | - | - |
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