Inconel Alloy 625/N06625/2.4856/NS 3306 Precipitation-Hardenable for Enhanced Mechanical Properties in Severe Environments
Inconel 625 (UNS N06625, 2.4856, NS 3306) is a high-performance nickel-chromium-molybdenum alloy known for its outstanding fatigue and thermal-fatigue strength, excellent weldability, and exceptional resistance to a wide range of aggressive environments, including high temperatures, corrosion, and oxidation. It is commonly used in demanding applications where both high strength and resistance to extreme conditions are required.
Inconel Alloy 625 (UNS N06625, 2.4856, NS 3306) is a nickel-based superalloy renowned for its excellent resistance to high-temperature oxidation, corrosion, and fatigue. The addition of molybdenum and niobium enhances its strength and resistance to aggressive chemical environments. With exceptional high-temperature performance and resistance to both pitting and crevice corrosion, Inconel 625 is widely used in aerospace, marine, chemical processing, power generation, and nuclear industries. It is also highly regarded for its weldability and ease of fabrication, making it a versatile material for many critical applications.
Trade Code
| Chemical Composition Wt.% | % | Ni | Cr | Mo | Nb+ta | Fe | Al | Ti | C | Mn | Si | Co | P | S |
| Min | 58 | 20 | 8 | 3.15 | | | | | | | | | |
| Max | | 23 | 10 | 4.15 | 5 | 0.4 | 0.4 | 0.1 | 0.5 | 0.5 | 1.00 | 0.015 | 0.015 |
| Physical Constants | Density(g/cm³) | 8.4 |
| Melting Range(℃) | 1290-1350 |
| Minimum mechanical properties of alloy at room temperature | Typical mechanical properties | Tensile strength Rm N/mm² | Yield strength RP 0.2 N/mm² | Elongation A5 % | Brinell Hardness HB |
| Solution treatment | 830 | 414 | 30 | ≤290 |
Key Features:
- Exceptional Corrosion Resistance:
Outstanding resistance to oxidation and corrosion in high-temperature, aggressive environments.
Superior resistance to seawater, acids, and other corrosive chemicals.
Highly resistant to pitting, crevice corrosion, and stress corrosion cracking, particularly in marine environments and harsh industrial settings.
- High-Temperature Strength:
Excellent strength at elevated temperatures, making it suitable for use in applications that involve thermal cycling and high-temperature oxidation.
The alloy retains good mechanical properties even under extreme heat and stress.
Molybdenum (Mo) enhances resistance to pitting and crevice corrosion in reducing environments.
Niobium (Nb) contributes to strengthening the alloy by forming solid solution strengthening phases and enhances the alloy’s resistance to high-temperature oxidation.
Titanium (Ti) stabilizes the alloy and contributes to its resistance to high-temperature creep and fatigue.
Inconel 625 can be easily welded using various methods, including TIG, MIG, and gas welding.
It also demonstrates excellent fatigue and thermal-fatigue strength, making it suitable for dynamic applications.
The alloy can be cold and hot worked into wire, sheet, plate, bar, and tube forms.
High tensile strength and fatigue resistance at elevated temperatures.
The alloy performs well under both high-temperature and cryogenic conditions.
Resistance to both hot and cold cracking.
Applications:
Inconel 625 is used in a wide range of industries where high-performance, corrosion-resistant, and heat-resistant materials are essential:
- Aerospace: Components such as turbine blades, seals, exhaust systems, and other high-temperature parts.
- Chemical Processing: Equipment exposed to aggressive chemicals and corrosive environments, such as reactors, heat exchangers, and piping systems.
- Marine and Offshore: Marine structures, seawater equipment, and heat exchangers, where resistance to chloride-induced corrosion is critical.
- Power Generation: Components in gas turbines, nuclear reactors, and furnaces that require resistance to high temperatures and corrosive gases.
- Oil and Gas: Equipment used in the extraction and refining processes, especially in offshore drilling and subsea applications.
- Nuclear Power: Parts used in nuclear reactors, where materials need to withstand extreme temperatures, radiation, and corrosion.
- Environmental Engineering: Scrubbers, pollution control equipment, and exhaust systems that are exposed to corrosive and high-temperature gases.
It is also used for specialized high-performance components like bolts, fasteners, and custom-engineered parts.
Common Forms:
Inconel 625 is available in various forms, including:Wire(for electrical and welding applications);Sheet; Plate; Bar;Tube. It is also used for specialized high-performance components like bolts, fasteners, and custom-engineered parts.
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Inconel Alloy 625/N06625/2.4856/NS 3306 Precipitation Hardenable for Enhanced Mechanical Properties in Severe Environments Images
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