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Incoloy Alloys – High-Temperature Corrosion-Resistant Nickel-Iron Alloys
Incoloy alloys are designed for service in extreme environments combining heat, pressure, and corrosive media. Ideal for chemical processing, nuclear, marine, and thermal treatment systems.
What Is Incoloy?
Incoloy® is a family of nickel-iron-chromium-based superalloys manufactured by Special Metals Corporation. Unlike Inconel, which is optimized for oxidation and strength at ultra-high heat, Incoloy offers a balance between:
- High strength at elevated temperatures
- Outstanding resistance to sulfuric and phosphoric acid
- Stress-corrosion and pitting resistance in seawater and chlorides
- Excellent structural stability under thermal cycling
Most Popular Incoloy Grades:
Incoloy 800 / 800H / 800HT – High strength + oxidation resistance
Incoloy 825 – Corrosion resistant in reducing + oxidizing acid
Incoloy 925 / 945 / A286 – High strength and corrosion resistance, often used in oil & gas
Products Link
Optional product specifications
| Property | Details |
|---|---|
| Product Forms | Seamless pipe, plate, bar, forging, strip, tube, wire |
| Grades Available | Incoloy 800H, 800HT, 825, 925, A286, 903 |
| Standards | ASTM B163/B407/B409/B514/B564, DIN 1.4876, 1.4958, 2.4858 |
| Plate Thickness | 1mm – 100mm |
| Bar Diameter | Ø6mm – 300mm |
| Pipe Sizes | 1/2” – 20” NPS / SCH 10 – XXS |
| Finish | Annealed, polished, pickled, cold drawn, ground |
* MTC, third-party inspection, EN10204 3.1/3.2 available.
Incoloy alloys are a class of high-performance nickel-based alloys widely used in industry due to their excellent corrosion resistance, high-temperature strength, and stability. The following is a detailed description of their performance characteristics and applications:
1. Performance Characteristics
The performance characteristics of Incoloy alloys are mainly reflected in the following aspects:
1.1 Corrosion Resistance
Incoloy alloys exhibit excellent corrosion resistance in both oxidizing and reducing environments, resisting the erosion of various acid, alkali, and salt solutions. The oxide film formed on their surface effectively prevents further corrosion, maintaining their stability in harsh chemical environments.
1.2 High-Temperature Strength
These alloys maintain high mechanical strength and hardness at high temperatures, and are not prone to creep or deformation. This makes them ideal for high-temperature applications, such as furnaces and heat exchangers.
1.3 Thermal Stability
Incoloy alloys have a low coefficient of thermal expansion, resulting in minimal dimensional changes with temperature variations, ensuring structural integrity under thermal cycling conditions. 1.4 Mechanical Properties
It possesses good ductility and toughness, making it easy to process into various shapes while maintaining high strength and fatigue resistance, adapting to complex working conditions.
2. Applications
Incoloy alloys have a wide range of applications, mainly covering the following fields:
2.1 Chemical Industry
Used in the manufacture of reactors, pipelines, and valves to handle corrosive media such as strong acids and alkalis, ensuring long-term stable operation of equipment.
2.2 Oil and Gas
Providing corrosion-resistant and high-temperature-resistant solutions in high-temperature and high-pressure environments, such as oil well equipment and refinery pipelines.
2.3 Aerospace
Used in the manufacture of aircraft engine components and structural parts to withstand extreme temperatures and stresses, ensuring flight safety.
2.4 Energy Sector
Used in heat exchangers and steam generators in nuclear power plants and thermal power plants to improve energy conversion efficiency.
2.5 Medical Devices
Suitable for surgical instruments and implants, utilizing its biocompatibility and corrosion resistance to ensure medical safety. 3. Conclusion
Incoloy alloys, with their comprehensive properties, have become the preferred material in chemical, petroleum, aerospace, energy, and medical fields. Their corrosion resistance, high-temperature strength, and thermal stability ensure reliability and durability in extreme environments, driving advancements in industrial technology.
Processing & Packaging
Hot rolled or cold drawn processing
Annealing or bright solution heat treatment
PMI, UT, hardness, tensile & elongation tests
Clear heat number stamping + waterproof label
Packaging: plastic wrap + wooden box / crate / pallet
Why Buy From Xishang?
- Full stock of Incoloy 800/825 pipe, sheet, bar & wire
- Cut-to-length, threading, CNC machining service
- Weldability guidance + filler suggestions (e.g., ERNiCrMo-3)
- Precision forging + solution annealing available
- Corrosion simulation & technical support
- Global supply network with fast dispatch
Frequently Asked Questions
Q1: What's the difference between Incoloy 800 and 825?
A:
800 is mainly for high-temperature stability and oxidation resistance; 825 is used more for corrosion resistance in acids like sulfuric or phosphoric.
Q2: Can Incoloy 825 be used in seawater?
A:
Yes. It has excellent resistance to seawater corrosion, pitting, and crevice attack, making it suitable for marine systems.
Q3: Do you supply seamless pipes and heavy plates in Incoloy grades?
A:
Yes, we offer both hot-rolled plates up to 100mm and seamless tubes from NPS 1/2” to 20”.
Q4: What is the welding condition of Incoloy alloys?
A:
Most Incoloy grades can be welded using standard nickel-based filler wires (e.g., ERNiCrMo-3) with preheat control.
Q5: Do you offer low MOQ or urgent delivery?
A:
Absolutely. Stocked items can ship in 3–5 days, and small batch trial orders are welcome.
Let us know your required grade
Whether you're building a heat exchanger, chemical reactor, or marine component, Xishang offers top-quality Incoloy materials with full certification and global delivery.
