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Material: Exceptional high-temperature resistance – this is its core advantage, making it specifically designed for extreme heat conditions. High strength at elevated temperatures: While most steels soften above 600°C, NO6617 maintains considerable strength at 1000°C (tensile strength approx. 180–220 MPa) and exhibits excellent creep resistance – meaning it resists slow deformation under long-term exposure to high temperatures and stress. High service temperature limit: In oxidizing environments, it can operate continuously at 1100°C, and can withstand short-term exposure up to 1200°C or beyond.
Powerful corrosion-resistant armor: Its high chromium (Cr) and aluminum (Al) content forms a dense, self-repairing oxide layer on the surface – like a solid suit of armor.
Oxidation and spallation resistance: This protective layer remains stable at extremely high temperatures and resists spalling even under repeated heating and cooling thermal cycles.
Carburization and sulfidation resistance: In aggressive atmospheres containing carbon (e.g., petrochemical cracking environments) or sulfur (e.g., combustion gases), it demonstrates strong resistance, effectively preventing embrittlement or rapid corrosion.
Excellent microstructural stability and overall performance: Unlike some other high-temperature alloys that rely on special precipitate strengthening phases, NO6617's microstructure remains remarkably stable after long-term high-temperature service – resistant to embrittlement.
Balanced performance: It achieves an excellent balance across often-contradictory properties – high-temperature strength, creep resistance, oxidation resistance, and microstructural stability – making it a highly versatile material.
Good workability: Despite its high strength, it is relatively easy to machine and weld compared to other superalloys in its class. Conventional TIG welding and other methods can be used for joining, and post-weld heat treatment is generally not required.
Dimensional Accuracy Assurance: The machining process follows a sequence of roughing, medium roughing, semi-finishing, and finishing on CNC machining centers, combined with custom tooling and fixtures. Finished products are inspected using CMM inspection and GOM 3D scanning to ensure product quality.
Anti-deformation Process: Nickel alloy materials are prone to deformation during machining. We adopt a cutting process combining stress relief and coolant-assisted cold cutting, ensuring that deformation after machining is controlled within 0.5 mm per meter.
Custom Cutting Tools: Nickel alloys tend to cause rapid tool wear during machining. Based on the compositional characteristics of this material, we have developed custom cutting inserts specifically designed for machining it. This increases cutting efficiency by 60–80% and reduces tooling costs by 50–60%.
Typical Customers: Leading nuclear power companies both domestically and internationally.
CMM Inspection: After product machining is completed, GOM 3D scanning inspection is performed and an inspection report is issued.
| Parameter | Typical Value / Range |
|---|---|
| Roughness Requirement | Ra0.8-Ra1.6 |
| Wall Thickness | 9.57MM |
| Connection Type | Special bevel groove welding process |
| Thickness (T) | 300-400 mm |
| Weight | 1-2 tons/piece |