Inconel Alloy 718 Welding Wire N07718 GH4169 NiCr19Nb5Mo3 2.4668 Perfect for Chemical Processing Systems
Inconel 718 Welding Wire (N07718/GH4169/NiCr19Nb5Mo3/2.4668) is a nickel-based superalloy wire designed for applications requiring exceptional mechanical strength, corrosion resistance, and high-temperature performance. It is widely used in aerospace, power generation, chemical processing, and marine industries for welding and fabricating components subjected to extreme environments. Inconel 718 Welding Wire (N07718/GH4169/NiCr19Nb5Mo3/2.4668) is a premium nickel-based alloy known for its exceptional strength, corrosion resistance, and high-temperature performance. Designed for welding critical components in aerospace, power generation, and chemical processing, it ensures durability and reliability under extreme conditions. While it is more expensive, its superior properties make it indispensable for demanding environments.
Trade Code
| Chemical Composition Wt.% | % | Ni | Cr | Fe | Mo | Nb | C | Mn | Si | S | P | Cu | Al | Ti | B |
| Min | 50 | 17 | Bal. | 2.8 | 4.75 | | | | | | | 0.20 | 0.65 | |
| Max | 55 | 21 | Bal. | 3.3 | 5.50 | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 0.30 | 0.80 | 1.15 | 0.006 |
| Density(g/cm³) | 8.24 |
| Melting Range(℃) | 1260-1320 |
| Typical mechanical properties | Tensile strength Rm N/mm² | Yield strength RP 0.2 N/mm² | Elongation A5 % | Brinell Hardness HB |
| Solution treatment | 965 | 550 | 30 | ≤363 |
Key Features of Inconel 718 Welding Wire:
Nickel (Ni): ~50-55% (base metal).
Chromium (Cr): ~17-21% for oxidation and corrosion resistance.
Molybdenum (Mo): ~2.8-3.3% for enhanced strength and resistance to pitting corrosion.
Niobium (Nb) and Tantalum (Ta): ~4.75-5.5% for age-hardening capabilities.
Iron (Fe): Balance.
Other Elements: Includes cobalt, manganese, titanium, and aluminum for improved mechanical properties.
Oxidation Resistance: Excellent resistance to oxidation and scaling in high-temperature environments.
Pitting and Crevice Corrosion: Outstanding resistance to pitting, crevice corrosion, and intergranular attack, especially in chloride-containing environments.
Stress Corrosion Cracking (SCC): Resists SCC in high-stress and corrosive conditions.
Mechanical Properties:
High Strength: Exceptional tensile and yield strength, even at elevated temperatures.
Creep and Fatigue Resistance: Performs reliably under cyclic thermal and mechanical stresses.
Age-Hardening Capabilities: Precipitation-hardening increases its strength after heat treatment.
- High-Temperature Performance:
Temperature Range: Maintains mechanical integrity up to ~700°C (1292°F).
Suitable for applications requiring both high strength and oxidation resistance at elevated temperatures.
Ease of Welding: Designed for welding applications, including TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and arc welding processes.
Minimal Cracking: Good resistance to hot cracking and post-weld heat treatment improves joint properties.
Repair and Maintenance: Ideal for repairing components in extreme service conditions.
Applications:
- Aerospace: Used in jet engine components, gas turbines, and rocket engines due to its high strength and oxidation resistance.
- Power Generation: Found in turbine blades, exhaust ducts, and high-temperature fasteners.
- Chemical Processing: Suitable for heat exchangers, reactors, and vessels in corrosive environments.
- Marine Applications: Excellent performance in seawater-exposed components, including piping and hardware.
Advantages of Inconel 718 Welding Wire:
- Exceptional Corrosion Resistance: Performs well in aggressive and high-temperature environments.
- High Mechanical Strength: Retains structural integrity under extreme thermal and mechanical loads.
- Ease of Fabrication and Welding: Excellent workability and weldability reduce fabrication complexities.
- Long Service Life: Offers durability and reliability in demanding applications, reducing maintenance and replacement costs.
Limitations of Inconel 718 Welding Wire:
- Cost: The high nickel and alloying element content make it more expensive than other materials.
- Heat Treatment Complexity: Requires precise control of heat treatment processes for optimal performance.
- Specialized Applications: Over-engineered for non-critical applications, where simpler materials may suffice.
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Inconel Alloy 718 Welding Wire N07718 GH4169 NiCr19Nb5Mo3 2.4668 Perfect For Chemical Processing Systems Images
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