Inconel 718 bar is a high-performance nickel-chromium-iron alloy optimized for automobile manufacturing, with excellent high-temperature resistance, fatigue resistance and machinability. It is used to make key high-stress components of automobiles, improving the reliability and durability of parts, and is suitable for high-performance, new energy and heavy-duty automobile fields.
| Item | Details |
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| Product Brief Introduction | Inconel 718 bar is a high-performance nickel-chromium-iron alloy bar, specially optimized for the automobile manufacturing industry. It integrates excellent high-temperature resistance, corrosion resistance, fatigue resistance and high mechanical strength, and has good machinability and weldability. It is mainly used to manufacture key high-stress, high-temperature components in automobile engines, transmission systems and chassis, which can effectively improve the reliability, durability and performance of automobile components. It is a core high-end alloy material for upgrading and upgrading automobile manufacturing, especially suitable for high-performance, new energy and heavy-duty automobile fields, and fully meets the strict quality and performance requirements of the automobile manufacturing industry. |
| Core Selling Points | 1. Excellent high-temperature performance: Can withstand long-term work at 650℃, and maintain stable mechanical properties under high-temperature conditions such as automobile engine operation, avoiding component deformation and failure;
2. Super strong fatigue resistance: Adapt to the frequent vibration and alternating load of automobile operation, reduce component wear and failure rate, and extend the service life of automobile key parts; 3. Good corrosion resistance: Resist corrosion of engine oil, coolant, exhaust gas and external harsh environment (rainwater, salt spray), avoid component rust and damage; 4. High dimensional precision: Strict control of diameter, length and straightness tolerances, easy to process and assemble, ensuring the consistency of automobile parts batch production; 5. Excellent machinability: Easy to cut, drill, forge and weld, reducing processing difficulty and production cost for automobile manufacturers; 6. Environmentally friendly and durable: Meet the environmental protection standards of the automobile industry, no harmful substances, and can be recycled, in line with the development trend of green automobile manufacturing; 7. Stable batch performance: Uniform chemical composition and mechanical properties, ensuring the consistency of key automobile components, avoiding performance differences affecting automobile safety. |
| Standards | 1. International Standards: ASTM B637 (Nickel-Chromium-Iron Alloy Bars), AMS 5662 (Aerospace and Automobile Grade Inconel 718 Bars), DIN 17752 (Nickel and Nickel Alloy Bars);
2. Industry Standards: ISO 9001 Quality Management System Certification, IATF 16949 (Automobile Industry Quality Management System Certification), ensuring compliance with automobile manufacturing quality requirements; 3. Testing Standards: ASTM E8 (Tensile Testing), ASTM E9 (Compression Testing), ASTM E23 (Impact Testing), ensuring the accuracy and reliability of product performance testing. |
| Material Grade | 1. Main Grade: Inconel 718;
2. International Designations: UNS N07718 (American Standard), W.Nr. 2.4668 (German Standard), EN 2.4668 (European Standard); 3. Equivalent Grades: GB GH4169 (Chinese Standard), JIS NW7718 (Japanese Standard), ensuring international compatibility and adaptability to global automobile manufacturing standards. |
| Chemical Composition (Weight %) | Nickel (Ni): 50.00 – 55.00; Chromium (Cr): 17.00 – 21.00; Iron (Fe): 14.00 – 18.00; Molybdenum (Mo): 2.80 – 3.30; Niobium (Nb): 4.75 – 5.50; Titanium (Ti): 0.65 – 1.15; Aluminum (Al): 0.20 – 0.80; Carbon (C): ≤0.08; Manganese (Mn): ≤0.35; Silicon (Si): ≤0.35; Phosphorus (P): ≤0.015; Sulfur (S): ≤0.015; Copper (Cu): ≤0.30. |
| Mechanical Properties (Annealed State) | Tensile Strength: ≥1240 MPa; 0.2% Yield Strength: ≥860 MPa; Elongation (δ5): ≥15%; Reduction of Area (ψ): ≥30%; Hardness (HB): 300 – 380; Impact Toughness (Akv, Room Temperature): ≥60 J; High-Temperature Tensile Strength (650℃): ≥900 MPa; Fatigue Strength (10⁷ Cycles): ≥550 MPa. |
| Dimensional Tolerance | 1. Diameter Tolerance: Precision Grade (≤50mm): ±0.02mm; Ordinary Grade (50-100mm): ±0.03mm; ensuring precise fit with automobile part processing molds;
2. Length Tolerance: Fixed Length (1m-6m): ±0.3mm/m, maximum full-length tolerance ≤1.0mm; customizable length up to 12m, meeting different part processing needs; 3. Straightness: ≤0.2mm/m, full-length straightness error ≤0.5mm/6m, avoiding processing deformation caused by bending; 4. Roundness: ≤0.015mm (diameter ≤50mm); ≤0.02mm (diameter 50-100mm), ensuring uniform diameter and easy processing. |
| Why the Automobile Manufacturing Industry Uses This Material | 1. High-temperature adaptability: Automobile engines, exhaust systems and other components work at high temperatures for a long time (up to 600℃+), and Inconel 718 bar can maintain stable performance without deformation or failure, which is far superior to ordinary steel bars;
2. Fatigue resistance meets industry needs: Automobile operation is accompanied by frequent vibration and alternating load, and the strong fatigue resistance of this material can reduce the wear and replacement frequency of key parts, improve automobile reliability; 3. Corrosion resistance fits working environment: It can resist the corrosion of engine oil, coolant, exhaust gas and external rainwater, salt spray, avoiding component rust and extending the service life of automobiles; 4. Lightweight and high strength: Compared with traditional high-strength steel, it has higher strength under the same weight, which helps to reduce automobile weight, reduce fuel consumption (for fuel vehicles) and improve battery life (for new energy vehicles); 5. Machinability and batch stability: It is easy to process into various complex-shaped automobile parts, and the batch performance is uniform, which is suitable for large-scale mass production of automobile manufacturers, ensuring production efficiency and product consistency. |
| Applicable Working Conditions in Automobile Manufacturing | 1. Engine System: Engine turbine blades, connecting rods, valve seats, cylinder liners, piston pins (working under high temperature, high pressure and alternating load);
2. Transmission System: Gearbox gears, shafts, synchronizer components (resisting wear, fatigue and high-speed rotation impact); 3. Exhaust System: Exhaust manifolds, exhaust pipes, catalytic converter shells (withstanding high-temperature exhaust gas corrosion and thermal shock); 4. Chassis System: Suspension components, brake calipers, steering knuckles (bearing high load, corrosion resistance and impact resistance); 5. New Energy Automobile: Drive motor rotor shafts, battery bracket components, charging pile connectors (high strength, corrosion resistance, stable electrical performance); 6. Heavy-Duty Automobile: Engine parts, transmission parts, axle components (adapting to harsh working conditions such as high load, long-term operation and complex road conditions). |
| Corresponding User Needs in the Automobile Manufacturing Industry | 1. High Reliability Demand: Automobile manufacturers need key parts to have long service life and low failure rate, and this product’s fatigue resistance and corrosion resistance can meet the demand for stable operation of automobiles;
2. High Performance Demand: With the upgrading of automobiles (high power, high speed, lightweight), manufacturers need materials with high strength and high temperature resistance to improve automobile performance; 3. Mass Production Demand: Uniform batch performance and good machinability of the product can meet the large-scale production needs of automobile manufacturers, reduce processing costs and improve production efficiency; 4. Environmental Protection Demand: The product is environmentally friendly, non-toxic and recyclable, in line with the global automobile industry’s green development trend and environmental protection standards; 5. Cost Control Demand: The long service life of the product reduces the frequency of parts replacement and maintenance, indirectly reducing the production and after-sales costs of automobile manufacturers; 6. Standard Compliance Demand: The product meets international and automobile industry standards, ensuring that automobile parts can pass quality inspection and market acceptance. |
| Common Related Products in the Automobile Manufacturing Industry | 1. Inconel 718 Forgings: Used to manufacture large and complex automobile components such as engine crankshafts, gearbox casings and axle housings;
2. Inconel 718 Welding Wire: Used for welding Inconel 718 bar components, ensuring welding strength and consistency with the base material; 3. Inconel 718 Tube: Used for automobile exhaust pipes, engine cooling pipes and other pipeline components; 4. Inconel 718 Sheet/Plate: Used for automobile body structural parts, engine covers and exhaust system shells in high-performance automobiles; 5. Inconel 718 Fasteners: Bolts, nuts and screws used to connect key automobile parts, ensuring connection strength and corrosion resistance; 6. Inconel 718 Machined Parts: Finished parts directly processed from Inconel 718 bar, such as piston pins, valve stems and gear shafts, which can be directly assembled and used. |
| Supplementary Information (For Automobile Manufacturers) | 1. Machining Guidance: Provide professional machining parameters (cutting speed, feed rate, tool selection) to help manufacturers reduce processing difficulty and improve processing efficiency;
2. 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 automobile industry’s quality traceability requirements; 3. 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; 4. Delivery Guarantee: Short delivery cycle, support urgent orders, ensure the production progress of automobile manufacturers; 5. Technical Support: Provide on-site technical guidance, solve problems encountered in processing, welding and assembly, and assist manufacturers in optimizing production processes; 6. Certification & Reports: Provide IATF 16949 certification, material test report (MTR), mechanical performance test report and other related documents to meet automobile project acceptance requirements. |