N08825/Incoloy Alloy 825/NS142/NiCr21Mo/2.4858/NCF 825 Incoloy Alloy Nuts For Petrochemical And Chemical Processing
Incoloy 825 (UNS N08825 / W.Nr. 2.4858) is a nickel-iron-chromium alloy with added molybdenum, copper, and titanium, offering excellent resistance to corrosion and oxidation. It is particularly effective against sulfuric and phosphoric acids, making it ideal for harsh environments like chemical processing, marine applications, and nuclear fuel reprocessing.
Incoloy 825 nuts are highly durable, maintaining strength and stability in extreme temperatures and aggressive conditions. Their superior resistance to pitting, crevice corrosion, and stress corrosion cracking ensures longevity in seawater, acidic solutions, and oxidizing agents. These nuts are widely used in heat exchangers, piping systems, and offshore structures where corrosion resistance is critical.
Available in various sizes and specifications, Incoloy 825 nuts comply with ASTM B564 standards, ensuring reliability in industrial applications. Their excellent mechanical properties, combined with outstanding weldability and fabrication capabilities, make them a preferred choice for demanding industries requiring high-performance fasteners.
| Chemical Composition Wt.% | % | C | Mn | Cr | Ni | Cu | Mo | Ti | Al |
| Min |
|
| | | |
| 0.15 | 0.15 |
| Max | 0.05 | 1 | 21.5 | 42 | 2.25 | 3 | 0.6 | 0.6 |
| Physical Constants | Density(g/cm³) | 8.14 |
| Melting Range(℃) | 1370-1400°C |
| AlloyState | Recovery Strength Reduction (RP0.2) N/mm2 | Tensile Strength Rm N/mm2) | Elongation A5% |
| Solid Solution State | 220 | 585 | 30 |
Trade Code
Incoloy 825 (N08825) Alloy Nut – Key Features
- Corrosion Resistance – Excellent resistance to a wide range of corrosive environments, including sulfuric and phosphoric acids, seawater, and oxidizing or reducing agents.
- High-Temperature Performance – Maintains strength and oxidation resistance in high-temperature applications.
- Nickel-Iron-Chromium Base – Provides a strong and stable structure with added molybdenum, copper, and titanium for enhanced performance.
- Pitting and Crevice Corrosion Resistance – Superior protection against localized corrosion, making it ideal for marine and chemical processing applications.
- Stress Corrosion Cracking Resistance – Resists chloride-induced stress corrosion cracking, ensuring durability in harsh conditions.
- Good Mechanical Properties – Offers high tensile strength, good toughness, and excellent creep resistance.
- Weldability – Can be easily welded using standard welding techniques without compromising its properties.
- Versatile Applications – Commonly used in chemical processing, nuclear industry, marine engineering, pollution control, and heat exchangers.
Incoloy 825 (UNS N08825, W.Nr. 2.4858) is a corrosion-resistant nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. It is designed for excellent resistance to acidic and marine environments, making it ideal for various industrial applications.
Applications of Incoloy 825 Nuts
- Chemical Processing Industry
Used in equipment handling sulfuric, phosphoric, and nitric acids
Ideal for heat exchangers, piping systems, reactors, and tanks
Resistant to stress corrosion cracking and pitting in acidic conditions
- Marine and Offshore Engineering
Suitable for seawater applications due to excellent resistance to crevice corrosion
Used in subsea piping systems, offshore platforms, and shipbuilding components
Applied in high-temperature and corrosive environments, such as exhaust systems
Used in aircraft fuel and hydraulic line fittings
Utilized in nuclear and fossil fuel power plants
Found in heat exchangers and piping that handle aggressive cooling waters
Used in downhole and surface gas well components, where sour gas (H₂S) resistance is required
Common in tubing hangers, valves, and pipeline components exposed to corrosive fluids
- Food Processing and Pollution Control
Suitable for handling acidic and contaminated solutions in waste treatment plants
Used in heat exchangers, scrubbers, and evaporators in food and beverage processing
- Pharmaceutical and Biomedical Applications
Found in processing equipment where corrosion resistance is essential for hygiene
Used in reactor vessels and piping systems handling aggressive chemicals
Why Use Incoloy 825 Nuts?
- High resistance to chloride-induced stress corrosion cracking
- Excellent mechanical properties at elevated temperatures
- Outstanding resistance to reducing and oxidizing acids
- Long service life in harsh environments
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N08825/Incoloy Alloy 825/NS142/NiCr21Mo/2.4858/NCF 825 Incoloy Alloy Nuts For Petrochemical Chemical Processing Images
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