Inconel 718 bar is a reliable nickel-based superalloy featured with great heat resistance, corrosion resistance and high strength, widely used to make core parts for various power generation and power transmission equipment.
| Item | Details |
|---|---|
| Product Brief Introduction | Inconel 718 bar is a high-performance nickel-based superalloy specially designed for electric power equipment. It has excellent high-temperature resistance, corrosion resistance and mechanical strength, and is mainly used to manufacture key components of power generation equipment, ensuring stable and safe operation of electric power systems. |
| Core Selling Points | 1. Excellent high-temperature stability: Can work stably for a long time at 650℃, and maintain excellent mechanical properties under high-temperature conditions of power equipment (such as boiler, turbine), avoiding component deformation or failure;
2. Strong corrosion resistance: Resist corrosion of high-temperature flue gas, steam, electrolyte and other media in power systems, reduce equipment rust and damage, and extend service life; 3. High mechanical strength and fatigue resistance: Bear long-term high load, vibration and alternating stress in power generation operation, reduce component failure rate and ensure continuous power supply; 4. High dimensional precision: Strictly control diameter, length, straightness and roundness tolerances, meet the precise assembly requirements of power equipment components; 5. Good machinability and weldability: Easy to process into complex-shaped power parts (such as turbine shafts, valve components), and the welding strength is consistent with the base material, ensuring component integrity; 6. Stable batch performance: Uniform chemical composition and mechanical properties, suitable for large-scale production of power equipment, ensuring the consistency of components; 7. Anti-oxidation and anti-creep: Resist high-temperature oxidation and creep deformation, adapt to long-term continuous operation of power generation equipment, reduce maintenance costs. |
| Standards | 1. International Standards: ASTM B637 (Nickel-Chromium-Iron Alloy Bars for Electric Power), AMS 5662 (High-Temperature Alloy Bars for Power Equipment), DIN 17752 (Nickel Alloy Bars for Electric Power Industry);
2. Quality System Certification: ISO 9001, ISO 14001, ensuring compliance with electric power industry quality and environmental protection requirements; 3. Testing Standards: ASTM E8 (Tensile Testing), ASTM E23 (Impact Testing), ASTM E466 (Fatigue Testing), ensuring the accuracy and reliability of product performance testing. |
| Material Grade | 1. Main Grade: Inconel 718 (Electric Power Grade);
2. International Designations: UNS N07718 (American Standard), W.Nr. 2.4668 (German Standard), EN 2.4668 (European Standard); 3. Equivalent Grades: GB GH4169 (Chinese Electric Power Standard), JIS NW7718 (Japanese Standard), fully compatible with global electric power equipment manufacturing standards. |
| 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): ≤0.08; 9. Manganese (Mn): ≤0.35; 10. Silicon (Si): ≤0.35; 11. Phosphorus (P): ≤0.015; 12. Sulfur (S): ≤0.015; 13. Copper (Cu): ≤0.30. |
| Mechanical Properties (Electric Power Grade Annealed State) | 1. Tensile Strength: ≥1240 MPa;
2. 0.2% Yield Strength: ≥860 MPa; 3. Elongation (δ5): ≥15%; 4. Reduction of Area (ψ): ≥30%; 5. Hardness (HB): 300 – 380; 6. Impact Toughness (Akv, Room Temperature): ≥60 J; 7. High-Temperature Tensile Strength (650℃): ≥900 MPa; 8. Fatigue Strength (10⁷ Cycles): ≥550 MPa; 9. Thermal Stability: No obvious performance attenuation after 1000 hours of high-temperature aging. |
| Dimensional Tolerance (Electric Power Grade Precision) | 1. Diameter Tolerance: Precision Grade (≤50mm): ±0.015mm; Ordinary Grade (50-100mm): ±0.02mm, ensuring precise fit with power equipment processing molds;
2. Length Tolerance: Fixed Length (1m-6m): ±0.2mm/m, maximum full-length tolerance ≤0.8mm; customizable length up to 12m, meeting different power component processing needs; 3. Straightness: ≤0.15mm/m, full-length straightness error ≤0.4mm/6m, avoiding processing deformation caused by bending; 4. Roundness: ≤0.01mm (diameter ≤50mm); ≤0.015mm (diameter 50-100mm), ensuring uniform diameter and stable processing performance; 5. Surface Finish: Ra ≤0.8μm, no scratches, no oxide scale, meeting the precision assembly requirements of power equipment. |
| Why the Electric Power Industry Uses This Material | 1. High-temperature adaptability: Power equipment (boilers, turbines, generators) works at high temperatures (up to 600℃+) for a long time, and Inconel 718 bar can maintain stable performance without deformation, which is far superior to ordinary alloy materials;
2. Corrosion resistance fits working environment: It can resist the corrosion of high-temperature flue gas, steam, electrolyte and other media in power systems, avoid component rust and leakage, and ensure the safe operation of power equipment; 3. High strength and fatigue resistance: Power generation equipment bears long-term high load, vibration and alternating stress, and the strong mechanical properties of this material can reduce component failure rate, ensure continuous power supply; 4. Machinability and batch stability: It is easy to process into complex-shaped power parts, and the batch performance is uniform, which is suitable for large-scale production of power equipment manufacturers, ensuring production efficiency and product consistency; 5. Compliance with industry standards: It fully meets the strict quality and performance standards of the electric power industry, can pass power equipment acceptance, and ensures the stability of the power grid; 6. Cost-saving: The long service life of the product reduces the frequency of component replacement and maintenance, indirectly reducing the operation and maintenance costs of power enterprises. |
| Applicable Working Conditions in the Electric Power Industry | 1. Thermal Power Plants: Boiler components, turbine shafts, turbine blades, valve seats, high-temperature pipeline connectors (working under high temperature, high pressure and flue gas corrosion);
2. Nuclear Power Plants: Nuclear reactor cooling system components, high-temperature and high-pressure pipeline parts, control valve components (resisting radioactive media and high temperature and pressure); 3. Hydropower Plants: Hydraulic turbine components, generator rotor shafts, high-pressure valve cores (bearing high load and water corrosion); 4. Solar Thermal Power Plants: High-temperature heat exchange components, heat collector support parts (adapting to high-temperature solar radiation and thermal shock); 5. Wind Power Plants: Wind turbine gearbox shafts, generator components (resisting outdoor harsh environment and alternating load); 6. Power Transmission Equipment: High-voltage switch components, transformer accessories (resisting corrosion and ensuring stable electrical performance). |
| Corresponding User Needs in the Electric Power Industry | 1. High Safety Demand: Electric power enterprises need key components to have extremely high reliability and low failure rate, and this product’s high-temperature stability and corrosion resistance can fully ensure the safe operation of power equipment;
2. High Precision Demand: Power equipment components have strict assembly requirements, and the high dimensional precision of the product can meet the precise fit needs of parts, avoiding assembly errors; 3. High Performance Demand: With the upgrading of power equipment (high efficiency, large capacity), manufacturers need materials with high strength, high temperature resistance and corrosion resistance to improve equipment performance; 4. Batch Stability Demand: Uniform chemical composition and mechanical properties of the product can meet the large-scale mass production needs of power equipment manufacturers, ensuring the consistency of components; 5. Standard Compliance Demand: The product meets international and electric power industry standards, ensuring that components can pass power project acceptance and grid access; 6. Cost Control Demand: The long service life of the product reduces the frequency of component replacement and maintenance, reducing the operation and maintenance costs of power enterprises. |
| Common Related Products in the Electric Power Industry | 1. Inconel 718 Electric Power Forgings: Used to manufacture large and complex power components such as turbine disks, boiler headers and generator rotor shafts;
2. Inconel 718 Electric Power Welding Wire: Used for welding Inconel 718 bar components, ensuring welding strength and consistency with the base material, meeting electric power welding standards; 3. Inconel 718 Electric Power Tube: Used for power plant high-temperature pipelines, boiler cooling pipes and heat exchange pipes; 4. Inconel 718 Electric Power Sheet/Plate: Used for boiler shells, turbine casings and power equipment structural parts; 5. Inconel 718 Electric Power Fasteners: High-precision bolts, nuts and screws used to connect key power parts, ensuring connection strength and corrosion resistance; 6. Inconel 718 Precision Machined Parts: Finished power parts directly processed from Inconel 718 bar, such as valve stems, turbine blades and connecting rods, which can be directly assembled and used. |
| Supplementary Information (For Electric Power Manufacturers) | 1. Test Reports: Provide complete test reports, including material test report (MTR), mechanical performance test report, high-temperature performance test report and dimensional precision test report, meeting electric power project acceptance requirements;
2. Machining Guidance: Provide professional electric power-grade machining parameters (cutting speed, feed rate, tool selection) to help manufacturers reduce processing difficulty and improve processing precision; 3. Material Traceability: Establish a full-process traceability system, from raw material procurement to finished product delivery, with complete records, which can be queried and verified, meeting the electric power industry’s quality traceability requirements; 4. Packaging Protection: Adopt anti-corrosion, moisture-proof and anti-collision packaging, each bar is separated by a protective sleeve to avoid scratches during transportation, ensuring product surface quality; 5. Technical Support: Provide professional electric power technical guidance, solve problems encountered in processing, welding and assembly, and assist manufacturers in optimizing production processes; 6. Delivery Guarantee: Short delivery cycle, support urgent power orders, ensure the production progress of electric power equipment manufacturers. |