A286, also known as Nickel Alloys A286 or Incoloy A286, is actually a high- alloy based on nickel, chromium, iron and other elements, rather than a traditional stainless steel. Although it is sometimes mistakenly called austenitic stainless steel alloy, A86 has significant differences in composition, performance and application fields from stainless steel.
Incoloy A286
Chemical Composition
A286 alloy is primarily composed of the following elements, which provide excellent mechanical properties, corrosion resistance, and high-temperature stability.
| Alloy | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Other Significant Elements |
|---|---|---|---|---|
| Incoloy A286 | 24.0 – 27.0% | 13.5 – 16.0% | 1.0 – 1.5% | Titanium (Ti) 1.9 – 2.35%, Aluminum (Al) 0.1 – 0.65% |
| Incoloy 20 | 36 – 38% | 19 – 20% | 2.0 – 3.0% | Copper (Cu) 3.0 – 4.0%, Silicon (Si) ≤ 0.80%, Carbon (C) ≤ 0.06% |
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Physical properties
| Physical Property | Incoloy A286 | Incoloy 20 |
|---|---|---|
| Density (g/cm³) | 7.93 | 8.08 |
| Melting Point (°C) | 1364-1424 | 1357-1430 |
| Thermal Conductivity (W/(m·K)) (at 100°C) | 11.4 | N/A |
| Specific Heat Capacity (J/(kg·K)) (at 20°C) | 460 | N/A |
| Modulus of Elasticity (GPa) | N/A | N/A |
| Tensile Strength (MPa) (at 20°C) | 950 (Rm) | 620 (Rm) |
| Yield Strength (MPa) (at 20°C) | 680 (RP0.2) | 300 (RP0.2) |
| Elongation at Break (%) (at 20°C) | 28 (A5) | 40 (A5) |
| Hardness (HB) (Brinell) | 248 | N/A |
| Creep Strength (MPa) (at 650°C, 1000 hours) | 310 | N/A |
Mechanical Properties
| Mechanical Property | Incoloy A286 | Incoloy 20 |
|---|---|---|
| Tensile Strength (Ultimate Tensile Strength, UTS) (MPa) | Typically around 950 MPa | 620 MPa |
| Yield Strength (Yield Point, YP) (MPa) | Typically around 680 MPa | 300 MPa |
| Elongation at Break (%) | Typically around 28% | Typically around 40% |
| Reduction of Area (%) | N/A | Typically good, indicating ductility |
| Hardness (HB) (Brinell) | Typically around 248 | 155-207 |
| Hardness (Rockwell C) | N/A | 15 |
| Impact Strength (Charpy V-Notch) (J) | N/A | Typically good, indicating toughness |
| Fatigue Strength | Good fatigue resistance | N/A |
| Creep Strength (MPa) (at specific temperature and time) | Specified at 650°C for 1000 hours (e.g., 310 MPa) | N/A |
Heat Treatment Process The heat treatment process of A286 alloy mainly includes two steps: solid solution treatment and precipitation treatment: Solid Solution Treatment: The alloy is heated to 980°C-1080°C, held for a of time, and then rapidly cooled (usually by water quenching or oil quenching) to form a uniform solid solution.
This process helps to improve the’s plasticity and forgeability and improve its creep resistance. Precipitation Treatment: The alloy that has undergone solid solution treatment is heated again to 720-760°C, held for a certain period of time, and then cooled.
Through the formation of precipitated hardening phases (such as γ’ phase TiN, TiC, etc.), the strength and hardness of the material are further enhanced. The choice of precipitation treatment time depends on the specific application needs to obtain best mechanical properties.
Precautions A286 alloy shows high strength during cold working, which easily lead to work hardening, so it is necessary to control the deformation amount to avoid cracking or excessive deformation. The alloy can be machined by turning, milling drilling, and other mechanical processing methods, but it is necessary to use hard tool materials such as tungsten carbide or ceramic cutting tools and control the cutting speed to overheating.
Incoloy A286 and Incoloy 20 Differences
High-Temperature Strength and Corrosion Resistance:
- Incoloy A286: Known for its high-temperature strength and corrosion resistance up to 1300°F (704°C). It is precipitation-hardened and exhibits excellent creep and stress-rupture properties.
- Incoloy 20: Demonstrates good corrosion resistance to a wide range of organic and inorganic acids, chlorides, and sulfides. It maintains its properties at elevated temperatures and is resistant to high-temperature oxidation, corrosion, and stress-corrosion cracking.
Mechanical Properties:
- Incoloy A286: Offers high yield strength, durability, and creep resistance below 650°C. It has good processing plasticity and satisfactory welding performance.
- Incoloy 20: Provides excellent mechanical strength and toughness, allowing it to maintain structural integrity at high temperatures and pressures. It exhibits good tensile strength and impact resistance.
Incoloy A286 and Incoloy 20 Advantages
- High Temperature Strength:
- Incoloy Alloy A286 maintains excellent mechanical strength and stability at temperatures up to 700°C , making it ideal for high-temperature structural components.
- Excellent Corrosion Resistance:
- It exhibits outstanding resistance to oxidation, corrosion in acidic or alkaline environments, and stress corrosion cracking in chloride-containing environments. This makes it suitable for harsh environments such as chemical reactions, oil refining, and aerospace engines.
- Good Weldability and Fabricability:
- Incoloy Alloy A286 can be easily welded using various methods such as argon arc welding, plasma arc welding, and resistance welding. It also has good machinability and can be formed through both cold and hot processing.
- Wide Range of Applications:
- Due to its combination of high temperature strength, corrosion resistance, and good fabricability, Incoloy Alloy A286 is widely used in aerospace, automotive, petrochemical, and chemical industries.
- Corrosion Resistance:
- Incoloy Alloy 20 is known for its resistance to corrosion in a wide range of environments, including those containing oxidizing agents, reducing agents, and acids. This makes it suitable for applications in chemical processing, pollution control, and nuclear fuel reprocessing.
- Good Mechanical Properties:
- While not as high as Incoloy Alloy A286 at elevated temperatures, Incoloy Alloy 20 still offers good mechanical properties at room temperature and moderate temperatures.
- Stable Performance in High-Temperature Water:
- Incoloy Alloy 20 maintains stable performance in high-temperature water and steam environments, making it suitable for use in nuclear reactors and other high-temperature water applications.
- Ease of Fabrication:
- Incoloy Alloy 20 can be easily fabricated into various shapes and sizes, making it versatile for a wide range of applications. Incoloy Alloy 20 is more focused on corrosion resistance in a wide range of environments and has good mechanical properties at room temperature and moderate temperatures.
Incoloy A286 and Incoloy 20 Applications
Application Fields A286 alloy, with its excellent high-temperature strength and good thermal stability, is widely used in aerospace,rochemical, energy, and automotive fields. It includes but is not limited to: Aerospace field: Manufacturing critical components such as turbine disks, combustion chambers, fasteners. Automobile manufacturing field: Used for high-performance engine parts. Petrochemical field: Used for high-temperature reactors and high-pressure equipment. Energy industry Such as high-temperature parts in nuclear power plants and gas turbines. Alloy is important to the industries and the use of daily life, as a distributor, our company has the all kinds of incoloy and shapes.
Incoloy A286:
- Primarily used in high-temperature applications such as turbine disks, high-strength bolting, and critical components in nuclear power units.
- Suitable for aerospace, jet engines, and other high-performance industrial applications due to its high-temperature strength and corrosion resistance.
Incoloy 20:
- Widely used in the chemical, petroleum, and pharmaceutical industries due to its corrosion resistance.
- Applied in the manufacture of high-temperature components in aerospace, such as turbine disks, blades, and combustion chambers.
- Also used in energy sectors for high-temperature equipment like gas turbines, boilers, and nuclear reactors.
In Conclusion
In summary, A286, as a high-performance high-temperature alloy, has become the preferred material for many high-temperature and antioxidant applications its excellent high-temperature strength, good machining plasticity, and welding performance. Through reasonable heat treatment and processing technology, its performance can be further optimized to meet the of various complex working conditions. Huaxiao Metal Supplier provides the professional services and technology to producing the incoloy alloy to around the world, please contact us to get more details about the alloy.
Incoloy Alloy A286 and Incoloy Alloy 20 differ significantly in their chemical compositions, resulting in distinct properties and applications. Incoloy Alloy A286 is tailored for high-temperature strength and corrosion resistance in demanding environments like jet engines and nuclear power units. In contrast, Incoloy Alloy 20 offers excellent corrosion resistance to various acids and chemicals, making it suitable for applications in the chemical, petroleum, and pharmaceutical industries, as well as aerospace and energy sectors. Alloy applications are various and our company has the solutions for personalized to customers, if you want to learn about more informations ,please inquiry us and any questions are ok.