Incoloy A286 丨 UNS S66286
Incoloy A286 (UNS S66286 / 1.4980) is a precipitation-hardened iron-nickel-chromium superalloy strengthened with molybdenum, titanium, and vanadium additions. It provides an excellent balance of high-temperature strength, oxidation resistance, and good corrosion resistance up to 700°C. A286 is widely used in aerospace fasteners, gas turbine components, springs, bolts, and high-temperature structural parts. Its good fabricability combined with stable mechanical performance under thermal stress makes it a reliable material for critical engineering applications. J&A Alloy supplies Incoloy A286 in bar, sheet, plate, forging, and custom-machined components with full certification.
Incoloy A286 supplier & Manufacturer
Incoloy A286 is a precipitation-hardenable iron-nickel-chromium alloy designed for high strength and oxidation resistance at elevated temperatures. It is one of the most widely used heat-resistant stainless-type superalloys in aerospace and industrial gas turbine systems.
The alloy maintains excellent mechanical strength from room temperature up to approximately 700°C, making it suitable for long-term structural applications under thermal and mechanical stress. Compared with conventional stainless steels, A286 offers significantly improved creep resistance and fatigue strength.
Its combination of good corrosion resistance, high strength, and stable metallurgical behavior makes it a preferred material for aerospace fasteners, turbine components, and high-performance mechanical systems.
Features of Incoloy A286
- High strength at elevated temperatures
- Excellent oxidation resistance up to 700°C
- Good creep and stress rupture strength
- Precipitation-hardened structure
- Good corrosion resistance in mild environments
- Excellent fatigue resistance
- Good fabricability and weldability
- Stable mechanical performance under thermal cycling
- Widely used aerospace-grade alloy
- Cost-effective alternative to nickel-based superalloys
Chemical Composition of Incoloy A286
| Element | Content (%) |
|---|---|
| Iron (Fe) | Balance |
| Nickel (Ni) | 24.0 – 27.0 |
| Chromium (Cr) | 13.5 – 16.0 |
| Molybdenum (Mo) | 1.0 – 1.5 |
| Titanium (Ti) | 1.9 – 2.3 |
| Vanadium (V) | 0.1 – 0.5 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Carbon (C) | ≤ 0.08 |
| Sulfur (S) | ≤ 0.03 |
Physical Properties of Incoloy A286
| Property | Value |
|---|---|
| Density | 7.92 g/cm³ |
| Melting Range | 1370 – 1425°C |
| Electrical Resistivity | 0.90 μΩ·m |
| Thermal Conductivity | 15 W/m·K |
| Specific Heat Capacity | 460 J/kg·K |
| Modulus of Elasticity | 200 GPa |
Mechanical Properties of Incoloy A286
Age-Hardened Condition
| Property | Value |
|---|---|
| Tensile Strength | ≥ 900 MPa |
| Yield Strength (0.2% Offset) | ≥ 590 MPa |
| Elongation | ≥ 15% |
| Hardness | ≤ 30 HRC |
Corrosion Resistance
Incoloy A286 provides good corrosion resistance in mild atmospheric, freshwater, and industrial environments. While not intended for highly aggressive chemical service, it performs well in oxidation-dominated environments and maintains stability under thermal exposure.
The alloy is particularly suitable for aerospace and turbine environments where oxidation resistance and mechanical stability are more critical than extreme chemical corrosion resistance.
High Temperature Performance
| Property | Performance |
|---|---|
| Recommended Service Temperature | Up to 700°C |
| Oxidation Resistance | Very Good |
| Creep Resistance | Good |
| Thermal Fatigue Resistance | Good |
Available Forms
| Form | Availability |
|---|---|
| Bar | Round, Flat, Hex |
| Sheet | Available |
| Plate | Available |
| Forgings | Available |
| Wire | Available |
| Fasteners | Available |
Applications of Incoloy A286
- Aerospace fasteners
- Gas turbine components
- Jet engine parts
- Springs and washers
- High-temperature bolts and nuts
- Structural aircraft parts
- Power generation equipment
- Industrial heat-resistant assemblies
- Automotive turbocharger components
- High-stress mechanical systems
Incoloy A286 vs Other Alloys
| Property | Incoloy A286 | Inconel 718 | Stainless 316 | Incoloy 800H |
|---|---|---|---|---|
| High Temperature Strength | Very Good | Excellent | Poor | Good |
| Oxidation Resistance | Very Good | Excellent | Good | Excellent |
| Corrosion Resistance | Moderate | Very Good | Good | Good |
| Cost Efficiency | Excellent | Moderate | Excellent | Good |
Welding & Fabrication
Incoloy A286 has good weldability using GTAW, GMAW, and SMAW processes. Post-weld heat treatment is typically required to restore full precipitation-hardened mechanical properties. Proper fabrication ensures optimal fatigue and creep performance in high-temperature applications.
Standards & Equivalent Grades
| Standard | Designation |
|---|---|
| UNS | S66286 |
| W.Nr. | 1.4980 |
| AMS | 5525 / 5858 |
| ASTM | A286 / B564 |
| Trade Name | Incoloy A286 |
Frequently Asked Questions
What is Incoloy A286 used for?
It is widely used in aerospace fasteners, gas turbine components, springs, bolts, and high-temperature structural applications.
What is the UNS number of A286?
The UNS designation is S66286.
What is Incoloy A286?
It is a precipitation-hardened iron-nickel-chromium alloy designed for high strength and oxidation resistance at elevated temperatures.
What temperature can A286 withstand?
It can be used continuously up to approximately 700°C depending on stress conditions.
Is A286 corrosion resistant?
Yes, but mainly in mild environments and oxidation-dominated conditions rather than aggressive chemical media.
Is A286 better than stainless steel?
Yes, for high-temperature strength and oxidation resistance, A286 significantly outperforms conventional stainless steels.
Can A286 be welded?
Yes, using standard welding processes with post-weld heat treatment is recommended.
What is the difference between A286 and Inconel 718?
Inconel 718 offers higher strength and better corrosion resistance, while A286 is more cost-effective for aerospace fasteners and moderate environments.
What industries use A286?
Aerospace, gas turbines, automotive, power generation, and industrial high-temperature systems.
Why Choose J&A Alloy
J&A Alloy provides premium-quality Incoloy A286 with strict metallurgical control and global supply capability.
We offer:
- Full EN 10204 3.1 certification
- Aerospace-grade material supply
- Precision forging and machining
- Fast global delivery
- Strict quality inspection
- Custom manufacturing support
- Technical consultation for alloy selection
- Reliable long-term supply chain
J&A Alloy is committed to delivering high-performance nickel and iron-based alloys for aerospace, energy, and industrial applications worldwide.
