Inconel 718 nickel alloy, with outstanding fabricability, excellent weldability and long term structure stability, can be made into complex parts used for various industries. The nickel-chromium alloy has superb stress-corrosion cracking and pitting resistance at both high and low temperatures, and prominent resistance to high temperature oxidation.
Inconel 718 is a nickelchromium alloy with high strength and corrosion resistance. It is used at temperatures ranging from -423° to 1300°F (-253° to 705°C). As an age-hardenable alloy, the alloy Nickel Inconel 718 can be readily fabricated in very complex parts, and its welding characteristics are also outstanding. It also has good tensile, fatigue, creep, and rupture strength, which combined with easy fabrication and corrosion resistance. Due to its combination of properties, the Nicke Inconel 718 is used for a wide range ofapplications, such as liquid-fueled rockets, rings, and casings, various formed sheet metal parts for aircraft and land-based gas turbine engines, cryogenic tankage, and for fasteners and instrumentation parts.
- Easy to process
- High tensile strength, fatigue strength, creep strength and fracture strength at 700℃
- High oxidation resistance at 1000℃
- Stable chemical properties at low temperature
- Good welding performance
Inconel 718 Chemical Composition
Inconel 718 Physical Properties
Inconel 718 Mechanical Properties (Minimum value at 20℃)
|Tensile Strength (σb/MPa)||Yield Strength (σp0.2/MPa)||Elongation (σ5/%)|
Inconel 718 Welding mode
Inconel 718 alloy is easily welded by gas tungsten welding (GTAW), gas shielded Metal Arc welding (GMAW), shielded metal Arc welding (SMAW), electron beam (EB), and resistance welding techniques. Its welding characteristics are similar to those of HASTELLOY X alloy. Submerged arc welding (SAW) and oxyacetylene welding are not recommended, as these processes are characterized by high heat input to the base metal and slow weld cooling. These factors can increase welding constraints and promote cracking.
Base metal preparation
Before performing any welding operation, the welding surface and adjacent areas should be thoroughly cleaned with an appropriate solvent. All grease, oil, cutting oil, crayon marks, machining solutions, corrosion products, paint, scale, dye penetrant solutions, and other foreign objects should be completely removed.
Filling metal selection
Matching filler metals (AWS A5.14 ERNiFeCr-2, AMS5832) should be used to connect the Inconel 718 alloy. For welding 718 alloy to other alloys, it is recommended to use HASTELLOY® S (AMS 5838) or W (AWS A5.14 ErnIM-3, AMS 5786) to fill the wire.
Preheating and interlayer temperature
No need to preheat. Preheating is usually specified at room temperature (typical shop conditions). The interlayer temperature should be kept below 200°F (93°C). If necessary, auxiliary cooling methods may be used between passes, provided that such methods do not introduce contaminants.
Post-weld heat treatment
Inconel 718 alloy is usually used under full aging conditions. After molding and welding, full solution annealing is usually performed prior to aging for optimal joint and overall manufacturing performance. Best practice depends on the specific conditions of manufacture prior to aging.
- Bars & Rods & Foring Ring /Flanges
- Sheet & Plate
- Strip & Coil
- Welding Wire &Spring wire
- Seamless Tube & Welded Pipe
»Round Bar & Square Bar & Hexagon Bar
● Diameter : φ8～φ300mm Length:10mm-6000mm
● Hot forging, Hot Rolling, Cold Drawing
● Bright Surface, Polished Surface, Black Surface
»Tube & Pipe:Seamless Tube& Welded Pipe
● Cold Drawing Seamless Pipe： φ1.0～φ220mm
● Hot Extrusion pipe: φ50～φ250mm
● Others : U Blend Tube and Elbow
»Hot Rolled Plate & Cold Rolled Sheet
● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m
● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m
»Strip & Tape Ribbon
● Thickness: ≧ 0.01mm Width: 15mm-300mm
● Cold rolling BA Strip, Hard & Soft Condition
»Straight Length Wire & Spool Wire
● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm
● Package : 5-25kg/Spool or Box
ALLOY 718 APPLICATIONS
Inconel 718 wire is a high-performance nickel-based alloy wire that offers exceptional strength, corrosion resistance, and high-temperature capabilities. As a member of the renowned Inconel family of superalloys, Inconel 718 wire has earned its reputation as a versatile and reliable material, widely used in critical applications across various industries. This product description provides a comprehensive overview of the features, applications, and benefits of Inconel 718 wire.
Superior Strength: Inconel 718 wire exhibits outstanding tensile strength, making it suitable for applications that demand mechanical integrity and reliability in high-stress environments.
High-Temperature Performance: With its ability to retain mechanical properties at elevated temperatures, Inconel 718 wire is an ideal choice for components operating in extreme heat, such as gas turbines and jet engines.
Corrosion Resistance: The alloy’s excellent corrosion resistance allows Inconel 718 wire to withstand aggressive chemical environments, including acidic, alkaline, and chloride-containing media.
Wide Range of Applications: Inconel 718 wire finds use in a diverse range of industries, including aerospace, oil and gas, chemical processing, marine engineering, and nuclear power generation.
Weldability: Inconel 718 wire offers good weldability, enabling secure and reliable weld joints that maintain the alloy’s mechanical properties and corrosion resistance.
Inconel 718 wire is extensively utilized in various critical applications, including but not limited to:
Aerospace and Aviation: Key components in aircraft engines, gas turbines, combustion chambers, and exhaust systems benefit from the high strength and temperature resistance of Inconel 718 wire.
Oil and Gas: Inconel 718 wire plays a vital role in downhole components, wellhead equipment, and offshore drilling operations, where resistance to corrosion and high-temperature stability are crucial.
Chemical Processing: Inconel 718 wire is employed in reactors, heat exchangers, and valves in chemical processing plants, safeguarding against corrosive environments and high temperatures.
Marine Engineering: Inconel 718 wire is used in marine shafts, seawater piping, and offshore structures due to its ability to resist corrosion in harsh marine environments.
Nuclear Power Generation: Inconel 718 wire’s resistance to corrosion and high-temperature performance make it a suitable choice for nuclear power plant components.
Quality Assurance and Certification:
Inconel 718 wire is manufactured under strict quality control processes and adheres to industry standards, ensuring consistency and reliability in every product. Manufacturers provide certifications and test reports to demonstrate compliance with specific industry requirements and customer specifications.
- Material: Nickel-Chromium Alloy (Inconel 718)
- Wire Diameter: Available in various sizes (e.g., 0.8mm to 5.0mm)
- Forms: Round, flat, square, or as per customer requirements
- Tensile Strength: Typically in the range of 140-180 ksi (965-1241 MPa)
- Yield Strength: Minimum 100 ksi (690 MPa)
- Elongation: Minimum 30%
- Melting Point: Approximately 1290°C (2354°F)
- Density: 8.24 g/cm³ (0.297 lb/in³)
Packaging and Delivery:
Inconel 718 wire is typically supplied in spools or coils, ensuring convenient handling and storage. The wire is carefully packaged to prevent any damage or contamination during transportation. Depending on customer requirements, the wire can be delivered in various quantities, ranging from small spools for specialized applications to large coils for industrial production.
Manufacturers of Inconel 718 wire adhere to stringent quality assurance practices to ensure that every batch of wire meets the highest standards of performance and reliability. The wire undergoes rigorous testing for mechanical properties, corrosion resistance, and other critical parameters. Certificates of conformance and material test reports are provided, assuring customers of the wire’s compliance with industry specifications and requirements.
Safety and Handling:
Inconel 718 wire, like any other alloy, should be handled with care to avoid damage to the wire surface or any contamination that may affect its performance. Users should follow appropriate safety guidelines when handling the wire, including the use of protective gear such as gloves and safety glasses. Proper storage conditions are essential to maintain the wire’s integrity, and it is recommended to store the wire in a dry and controlled environment.
Inconel 718 wire stands as a testament to the remarkable properties and versatility of nickel-based superalloys. Its strength, corrosion resistance, and high-temperature capabilities make it a favored material in demanding applications across numerous industries. From aerospace to oil and gas and beyond, Inconel 718 wire continues to be a cornerstone of engineering excellence, pushing the boundaries of technological advancements and ensuring superior performance in critical components. Whether it’s for the most intricate aerospace machinery or the harshest offshore environments, Inconel 718 wire delivers unmatched reliability and durability, making it a trusted choice for engineers and manufacturers worldwide.