Product Specification

Incoloy A-286 / UNS S66286 / GH2132 Stainless Steel Bar Heat Resistant Stainless Steel Rod

Products Specification

Incoloy A-286 / UNS S66286 / GH2132 Stainless Steel Bar Heat Resistant Stainless Steel Rod

Incoloy A-286 is a high-performance, heat-resistant alloy made primarily from iron, nickel, and chromium, with additional elements like molybdenum and titanium. Its unique combination of strength, corrosion resistance, and high-temperature performance makes it an ideal choice for critical applications in industries such as aerospace, chemical processing, and power generation. This guide will explore the properties, composition, applications, and advantages of Incoloy A-286, as well as provide detailed information in a user-friendly format.

Product Overview

Incoloy A-286, also known by its UNS designation S66286 and its equivalent GH2132, is a heat-resistant alloy with excellent mechanical strength and resistance to oxidation and corrosion at high temperatures. It is commonly available in the form of bars, rods, and other machined products. Its ability to maintain stability and resist high-temperature degradation under severe conditions makes it a preferred material for many industries, including aerospace and power generation.

Chemical Composition

Incoloy A-286 is primarily composed of the following elements:

These elements contribute to the alloy's remarkable strength, heat resistance, and ability to withstand aggressive environments.

Mechanical Properties

Incoloy A-286 is designed to perform exceptionally well in high-stress environments. Below are its key mechanical properties:

These values make Incoloy A-286 suitable for applications that demand high strength and durability in elevated temperatures.

High-Temperature Performance

Incoloy A-286 is specifically designed for high-temperature environments, where it maintains good strength and oxidation resistance. It performs exceptionally well in temperatures up to 1,600°F (871°C). In particular, this alloy exhibits:

• Oxidation Resistance: Incoloy A-286 demonstrates excellent resistance to oxidation at elevated temperatures, making it suitable for long-term exposure to heat without significant degradation.

• Creep and Stress Rupture: Incoloy A-286 maintains its mechanical properties in high-stress, high-temperature environments, demonstrating outstanding creep and stress rupture characteristics.

Corrosion Resistance

The combination of chromium and molybdenum in Incoloy A-286 imparts superior resistance to a wide range of corrosive environments. Some of its key advantages in this area include:

• Sulfuric Acid: Excellent resistance to sulfuric acid at moderate concentrations and temperatures.

• Chloride Stress Corrosion: High resistance to chloride stress corrosion cracking, which is critical in applications involving exposure to chlorides.

• Pitting and Crevice Corrosion: The alloy’s resistance to pitting and crevice corrosion ensures durability in marine and chemical processing environments.

Applications of Incoloy A-286

Given its impressive combination of high-temperature strength and corrosion resistance, Incoloy A-286 is commonly used in the following industries:

1. Aerospace: Used in jet engine components, turbine blades, and exhaust components due to its high strength at elevated temperatures and resistance to oxidation.

2. Chemical Processing: Employed in equipment exposed to high temperatures and aggressive chemicals, such as heat exchangers, reactor vessels, and piping.

3. Power Generation: Used in gas turbines and components of power plants that operate at high temperatures.

4. Automotive: Used in components requiring high strength at elevated temperatures, such as turbochargers and exhaust systems.

5. Marine: Corrosion-resistant qualities make it an excellent choice for marine environments, particularly for components exposed to seawater.

6. Food Processing: Employed in environments where high temperatures and corrosive substances are common.

Available Forms and Sizes

Incoloy A-286 is available in various forms, including bars, rods, sheets, plates, and forgings. The most common forms are:

• Bars and Rods: Commonly used for manufacturing components through machining or forging. Available in different diameters and lengths to suit specific applications.

• Welded and Seamless Tubes: Used in industries requiring high strength and heat resistance in piping applications.

• Sheets and Plates: Used for heat exchangers and structural components exposed to high temperatures.

Below is a table outlining the common sizes available:

Fabrication and Machining

Incoloy A-286 can be easily fabricated using conventional machining processes like turning, milling, and drilling. However, due to its high strength, it may require specialized tooling and cutting speeds. Some important considerations for working with Incoloy A-286 include:

• Heat Treatment: Annealing or stress-relief heat treatment may be required to reduce residual stresses or soften the alloy for easier machining.

• Welding: Incoloy A-286 can be welded using standard welding techniques such as TIG or MIG welding, provided proper preheating and post-weld heat treatment are applied to prevent cracking or distortion.

Advantages of Incoloy A-286

1. Exceptional High-Temperature Strength: Maintains superior strength at temperatures up to 1,600°F (871°C), making it ideal for turbine and exhaust components.

2. Outstanding Corrosion Resistance: Its resistance to both high-temperature oxidation and aggressive chemical environments ensures long-term durability.

3. Versatility: Available in a variety of forms and sizes, Incoloy A-286 can be tailored to suit a broad range of industrial applications.

4. Creep and Stress Rupture Resistance: Excellent resistance to stress rupture and creep, ensuring performance under sustained high-stress conditions.

Comparison with Other Alloys

Incoloy A-286 can be compared to other high-temperature alloys such as Inconel 718 and Hastelloy C-276, each of which is optimized for specific high-temperature applications. Here's a brief comparison:

While Incoloy A-286 offers strong performance at slightly lower temperatures compared to Inconel 718, it is often more cost-effective for applications that do not require the extreme heat resistance of higher-end alloys.

Conclusion

Incoloy A-286, with its excellent strength, corrosion resistance, and ability to perform at high temperatures, is a highly versatile material for critical industrial applications. Its ability to maintain structural integrity under severe conditions makes it a preferred choice for components in the aerospace, chemical, and power generation sectors. Whether in bar, rod, or other forms, Incoloy A-286 offers exceptional reliability and durability for applications that demand performance under high-temperature stress.

By choosing Incoloy A-286, industries can ensure long-term reliability, cost-efficiency, and optimal performance in demanding environments.