Material: Incoloy Fasteners – Performance in High-Temperature and High-Corrosion Environments
Overview:
Incoloy® is a family of nickel-iron-chromium-based superalloys engineered to provide excellent strength, oxidation resistance, and corrosion resistance at high temperatures and in extreme environments. These alloys are well-suited for applications involving acidic and oxidizing conditions, particularly where chloride stress corrosion cracking is a concern.
At SM Fasteners, we manufacture precision-engineered Incoloy fasteners that are trusted by global industries including chemical processing, power generation, aerospace, and marine applications.
Why Choose Incoloy Fasteners?
Incoloy fasteners combine high strength and excellent corrosion resistance:
✅ High strength at elevated temperatures (up to 1000°C)
✅ Exceptional resistance to oxidation and carburization
✅ Excellent performance in aqueous and chloride-rich environments
✅ Superior weldability and long-term stability
✅ Available in a wide range of grades for specific applications
Popular Incoloy Grades Offered
Incoloy 800 (UNS N08800):
Resistant to oxidation, carburization, and sulfidation in high-temp environments.Incoloy 800H/800HT (UNS N08810/N08811):
Improved creep and rupture resistance; ideal for petrochemical and heat-treating industries.Incoloy 825 (UNS N08825):
Excellent resistance to sulfuric and phosphoric acids, seawater, and chloride-induced stress corrosion cracking.
Chemical Composition (Incoloy 825)
| Element | % Composition |
|---|---|
| Nickel (Ni) | 38 – 46 |
| Chromium (Cr) | 19.5 – 23.5 |
| Iron (Fe) | Balance |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Copper (Cu) | 1.5 – 3.0 |
| Titanium (Ti) | 0.6 – 1.2 |
| Manganese (Mn) | ≤ 1.0 |
| Carbon (C) | ≤ 0.05 |
| Silicon (Si) | ≤ 0.5 |
Mechanical Properties (Incoloy 825 – Annealed)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 586 MPa |
| Yield Strength (0.2%) | ≥ 241 MPa |
| Elongation | ≥ 30% |
| Hardness (Brinell) | ~ 150 HB |
| Max Operating Temp | ~ 1000°C |
Applications of Incoloy Fasteners
Used in severe conditions, Incoloy fasteners are preferred in:
Chemical Process Plants – Acid reactors, piping systems
Oil & Gas Industry – Downhole tools, pipelines, flanges
Nuclear Reactors – Core internals, waste processing
Heat Exchangers & Boilers – Headers, tubes, manifolds
Marine Systems – Seawater coolers, underwater components
Furnace Equipment – Retorts, radiant tubes, combustion chambers
Incoloy Fastener Types We Supply
Hex Bolts & Nuts
Fully Threaded Studs
Socket Head Cap Screws
Heavy Hex Nuts
Eye Bolts & U-Bolts
Washers and Custom Components
Special Fasteners as per drawings/spec
Packaging & Delivery
We ensure precision, quality, and protection with every shipment:
Anti-corrosive VCI packing in polybags or HDPE boxes
Wooden crates for bulk or export quantities
Heat number and specification tags on each lot
Domestic and international delivery support
Documentation Supplied
Each batch of Incoloy fasteners comes with:
Mill Test Certificates (EN 10204 3.1/3.2)
Material Traceability Report
Third-Party Inspection (if required)
Chemical and Mechanical Test Reports
Compliance with ASTM B564, B408, B366, DIN, ISO standards
Request a Quotation
Need a quotation for Incoloy fasteners? Contact our technical sales team:
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp Chat
🏆 SM Fasteners – India’s Leading Supplier of Incoloy Fasteners
With precise engineering, traceable quality, and global shipping, SM Fasteners delivers high-performance Incoloy fasteners that hold up in the most demanding environments—backed by our commitment to technical excellence and customer satisfaction.