Inconel 718 bar is a nuclear-grade nickel-based superalloy with excellent radiation resistance, high-temperature stability and corrosion resistance, specially designed for manufacturing key components of nuclear power plants to ensure safe and stable operation of nuclear facilities.
As a core material for nuclear power equipment, Inconel 718 bar can withstand extreme high temperature, high pressure and radioactive environment, meeting the strictest safety and reliability requirements of the global nuclear power industry.
| Item | Details |
|---|---|
| Executive Standards | 1. Nuclear Industry Standards: ASTM B637 (Nuclear-Grade Nickel Alloy Bars), ASME SB-637 (Nuclear Pressure Vessel Materials), RCC-M (French Nuclear Power Standard);
2. Quality System Certification: ISO 9001, ISO 14001, Nuclear Industry Quality System Certification; 3. Testing Standards: ASTM E8 (Tensile Testing), ASTM E23 (Impact Testing), ASTM E466 (Fatigue Testing), Radiation Resistance Testing, Corrosion Resistance Testing. |
| Material Grade | 1. Main Grade: Inconel 718 (Nuclear Grade);
2. International Designations: UNS N07718 (American Nuclear Standard), W.Nr. 2.4668 (German Nuclear Standard), EN 2.4668 (European Nuclear Standard); 3. Equivalent Grades: GB GH4169 (Chinese Nuclear Standard), JIS NW7718 (Japanese Nuclear Standard). |
| Chemical Composition (Weight %) | 1. Nickel (Ni): 50.00 – 55.00;
2. Chromium (Cr): 17.00 – 21.00; 3. Iron (Fe): 14.00 – 18.00; 4. Molybdenum (Mo): 2.80 – 3.30; 5. Niobium (Nb): 4.75 – 5.50; 6. Titanium (Ti): 0.65 – 1.15; 7. Aluminum (Al): 0.20 – 0.80; 8. Carbon (C): ≤0.05 (nuclear grade limit); 9. Manganese (Mn): ≤0.35; 10. Silicon (Si): ≤0.35; 11. Phosphorus (P): ≤0.010 (nuclear grade limit); 12. Sulfur (S): ≤0.010 (nuclear grade limit); 13. Copper (Cu): ≤0.30. |
| Mechanical Properties (Nuclear-Grade Annealed State) | 1. Tensile Strength: ≥1240 MPa;
2. 0.2% Yield Strength: ≥860 MPa; 3. Elongation (δ5): ≥18% (nuclear grade requirement); 4. Reduction of Area (ψ): ≥35% (nuclear grade requirement); 5. Hardness (HB): 300 – 360; 6. Impact Toughness (Akv, Room Temperature): ≥80 J (nuclear grade requirement); 7. High-Temperature Tensile Strength (650℃): ≥900 MPa; 8. Fatigue Strength (10⁷ Cycles): ≥550 MPa; 9. Radiation Stability: No obvious performance attenuation after 10⁸ n/cm² neutron irradiation. |
| Dimensional Tolerance (Nuclear-Grade Precision) | 1. Diameter Tolerance: Precision Grade (≤50mm): ±0.012mm; Ordinary Grade (50-100mm): ±0.018mm;
2. Length Tolerance: Fixed Length (1m-6m): ±0.15mm/m, maximum full-length tolerance ≤0.6mm; 3. Straightness: ≤0.12mm/m, full-length straightness error ≤0.3mm/6m; 4. Roundness: ≤0.008mm (diameter ≤50mm); ≤0.012mm (diameter 50-100mm); 5. Surface Finish: Ra ≤0.6μm, no scratches, no inclusions, no oxide scale. |
| Why the Nuclear Power Industry Uses This Material (Key Focus) | 1. Excellent Radiation Resistance: Can withstand long-term neutron and gamma ray irradiation without embrittlement or performance degradation, which is the core requirement for nuclear reactor materials;
2. Extreme High-Temperature and High-Pressure Resistance: Maintains stable mechanical properties under 650℃ and 150bar working conditions, suitable for nuclear reactor core and primary circuit systems; 3. Superior Corrosion Resistance: Resists corrosion of high-temperature high-pressure water, boric acid solution, lithium hydroxide and other nuclear coolants, avoiding stress corrosion cracking; 4. Outstanding Fatigue Resistance: Adapts to frequent start-stop and load changes of nuclear power plants, reducing fatigue failure risk of key components; 5. Low Activation Characteristics: Produces less radioactive isotopes after irradiation, reducing radioactive waste disposal difficulty and cost; 6. Mature Application History: Has been widely used in global nuclear power plants for decades, with proven safety and reliability; 7. Compliance with Strict Nuclear Standards: Fully meets ASME, RCC-M and other international nuclear industry standards, ensuring nuclear facility safety. |
| Application Scenarios & Corresponding Customers (Key Focus) | Application Scenarios:
1. Nuclear Reactor Core: Control rod drive shafts, fuel assembly components, reactor internal structures; 2. Primary Circuit System: Main coolant pump shafts, valve stems, pipeline connectors, pressure vessel internals; 3. Steam Generator: Heat exchanger tube sheets, support plates, steam generator internals; 4. Turbine System: High-pressure turbine blades, turbine shafts, generator rotor components; 5. Spent Fuel Treatment: Spent fuel storage racks, transportation cask components, reprocessing equipment parts; 6. Nuclear Safety Systems: Emergency cooling system components, safety valve parts, pressure relief devices. Corresponding Customers: 1. Nuclear power plant operators and owners; 2. Nuclear power equipment manufacturers (reactor, steam generator, turbine suppliers); 3. Nuclear engineering design institutes and EPC contractors; 4. Nuclear fuel cycle and spent fuel treatment enterprises; 5. Nuclear safety equipment manufacturers; 6. Global nuclear power project construction companies. |
| Corresponding User Needs in Nuclear Power Industry (Key Focus) | 1. Absolute Safety Demand: Nuclear power industry has zero tolerance for safety accidents, requiring materials with extremely high reliability and failure resistance;
2. Strict Compliance Demand: Must meet all international and national nuclear industry standards and certification requirements; 3. Full Traceability Demand: Complete material traceability records from raw material to finished product, meeting nuclear industry quality management requirements; 4. Long Service Life Demand: Nuclear power plants have a design life of 60-80 years, requiring materials with long-term stable performance; 5. High Precision Demand: Nuclear equipment components have ultra-strict assembly tolerances to ensure system sealing and safety; 6. Batch Consistency Demand: Uniform material performance to avoid individual component failure affecting the entire system; 7. Technical Support Demand: Professional technical guidance for material selection, processing and welding in nuclear applications. |
| Common Related Products in Nuclear Power Industry | 1. Inconel 718 Nuclear Forgings: Used for large components such as reactor pressure vessel internals, steam generator tube sheets;
2. Inconel 718 Nuclear Welding Wire: Special welding material for nuclear equipment, ensuring weld strength and radiation resistance; 3. Inconel 718 Nuclear Tube: Used for primary circuit pipelines, heat exchanger tubes, control rod guide tubes; 4. Inconel 718 Nuclear Sheet/Plate: Used for reactor internal liners, steam generator baffles, spent fuel storage containers; 5. Inconel 718 Nuclear Fasteners: High-strength bolts, nuts and studs for nuclear equipment assembly; 6. Inconel 718 Precision Machined Parts: Finished components such as valve stems, control rod shafts, pump impellers. |
| Why Choose Us (Emily PIPE) | 1. 20+ Years of Industry Experience: Professional manufacturer of nickel alloy and titanium alloy products, with rich experience in nuclear power industry material supply;
2. Nuclear-Grade Quality Control: Strictly follow nuclear industry standards throughout the production process, with a complete quality management system; 3. Complete Certifications: Hold multiple international certifications, helping customers meet strict nuclear power project procurement requirements; 4. Full Traceability System: Establish a complete material traceability system from raw material procurement to finished product delivery, all records are queryable and verifiable; 5. Customization Capability: Support customized production according to customers’ drawings, technical requirements and specific nuclear application environments; 6. Professional Technical Team: Experienced R&D and technical support team, providing professional material selection guidance and application solutions; 7. One-Stop Service: Provide comprehensive solutions from material selection, customized processing to global logistics delivery. |
| Inquiry Guidance Words | 1. If you need nuclear-grade Inconel 718 bar for your nuclear power project, please contact us with your specific requirements (size, quantity, technical standards), and we will provide a detailed quotation within 12 hours;
2. For any questions about nuclear material certification, traceability, mechanical properties or processing technology, please send us an inquiry, our nuclear industry specialist will reply to you promptly; 3. Emily PIPE is your reliable partner for nuclear power alloy materials. We provide high-quality products and professional services to help you complete your nuclear projects safely and on schedule. |
| Supplementary Information | 1. Complete Test Reports: Provide nuclear-grade material test report (MTR), mechanical performance test report, non-destructive testing report, radiation resistance test report and certification documents;
2. Non-Destructive Testing: All products undergo 100% ultrasonic testing (UT), eddy current testing (ET) and surface inspection; 3. Special Packaging: Adopt nuclear-grade anti-corrosion, moisture-proof and anti-collision packaging, with clear identification and traceability labels; 4. Delivery Guarantee: Stable production capacity and reliable logistics network, ensuring on-time delivery for nuclear power projects; 5. After-Sales Support: Provide professional after-sales technical support, including welding guidance, machining parameters and on-site technical assistance. |