Alloy 690 / UNS N06690
High-chromium nickel alloy engineered for strong resistance to oxidizing media and demanding high-temperature water environments.
Request Alloy 690 QuoteAlloy 690 Can Be Supplied in Multiple Forms.
UNS N06690 can be reviewed in different product forms to match fabrication, machining and project requirements. Final availability depends on specification, dimensions, heat-treatment condition, quantity and inspection requirements.
Bar & Rod
Forged, rolled, peeled and machined bar supplied to project dimensions and finishing requirements.
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Pipe & Tube
Seamless pipe, straight tube and U-bend tube for process, pressure and heat-transfer service.
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Sheet & Plate
Plate and sheet for pressure equipment, vessels, exchangers, high-temperature service and fabrication.
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Wire
Alloy wire for welding, springs, heating, forming and engineered applications.
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Strip
Cold-rolled and precision strip for heat-resistant, electrical, spring and specialty component applications.
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Forgings
Custom forged bars, rings, blanks and near-net components for demanding mechanical and thermal service.
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Welding Materials
Nickel and nickel-alloy welding wire and specialty welding materials for compatible fabrication and repair.
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Machined Parts
Drawing-based components with material traceability, machining control and inspection support.
Request this form →Overview & Key Features
Alloy 690 is especially relevant to steam-generator and heat-transfer service where corrosion resistance and metallurgical control are critical. Our manufacturing history includes Alloy 690 U-bend seamless tube supply experience for power and nuclear-related equipment.
Applications
Steam generators, heat exchangers, nuclear and power-generation equipment, high-temperature water service and corrosion-resistant process equipment.
Inspection Support
Project-specific dimensional, chemistry, mechanical and other inspection requirements can be coordinated according to the applicable material specification and purchase order.
Composition, Mechanical Properties & Product Standards
Description
Specifications
| UNS | W.Nr |
| N06690 | 2.4642 |
| Grade | % | Ni | Cr | Fe | C | Mn | Si | Cu | S |
| 690 | Min | 58.0 | 27.0 | 7.0 | 0.05 | ||||
| Max | 31.0 | 11.0 | 0.5 | 0.5 | 0.5 | 0.015 |
| Tensile Strength σb/MPa | Yield Strength σp0.2/MPa | Elongation σ5 /% |
| 580 | 260 | 30 |
| Bar | Forging | Sheet/Strip | Pipe |
| ASTM B166 | ASTM B564 | ASTM B168 | ASTM B163 ASTM B829 |