A286 Properties, Chemical Composition & Specifications – UNS S66286 / Alloy 660
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A286 Properties & Specifications | UNS S66286 Alloy 660
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Explore A286 properties, chemical composition and specifications of UNS S66286, Alloy 660 and AISI 660 for high-strength and high-temperature applications.
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Table of Contents
- What Is A286 Alloy?
- A286 Equivalent Designations
- A286 Chemical Composition
- A286 Properties
- A286 Mechanical and Physical Characteristics
- A286 High-Temperature Performance
- A286 Corrosion Resistance
- A286 Heat Treatment and Precipitation Hardening
- A286 Round Bar Specifications
- A286 Industrial Applications
- How to Specify A286 Material
- Why A286 Is Selected for Industrial Components
- Frequently Asked Questions
- A286 Material Enquiry
What Is A286 Alloy?
A286 alloy is an iron-base austenitic precipitation-hardening alloy developed for applications requiring a combination of high strength, corrosion resistance and elevated-temperature performance.
The material is widely identified as:
- A286
- A-286
- Alloy A286
- Alloy 660
- Grade 660
- AISI 660
- UNS S66286
- W.Nr. 1.4980
Carpenter Technology identifies A-286 as UNS S66286, with AISI No. 660 and DIN No. 1.4980.
A286 is particularly useful where conventional stainless steels or alloy steels do not provide the required combination of strength and elevated-temperature capability.
A286 Equivalent Designations
Understanding the different names for A286 is important when searching for or purchasing the material.
| A286 Designation | Identification |
|---|---|
| A286 | Common alloy designation |
| A-286 | Alternate designation |
| Alloy A286 | Material name |
| Alloy 660 | Alternate grade designation |
| Grade 660 | Grade identification |
| AISI 660 | AISI designation |
| UNS S66286 | UNS designation |
| W.Nr. 1.4980 | Werkstoff designation |
These designations are useful for international procurement because buyers may specify the same material using different identification systems.
For example, an enquiry for UNS S66286 Round Bar and an enquiry for A286 Round Bar may refer to the same alloy, subject to confirming the required product specification and condition.
A286 Chemical Composition
The chemical composition of A286 is one of the main reasons for its combination of strength, corrosion resistance and high-temperature performance.
According to Carpenter Technology’s A-286 technical data, the nominal composition includes chromium, nickel, molybdenum, titanium, vanadium and boron, with iron as the balance.
A286 Chemical Composition
| Element | Composition |
|---|---|
| Carbon | 0.08% max. |
| Manganese | 2.00% max. |
| Silicon | 1.00% max. |
| Chromium | 13.50–16.00% |
| Nickel | 24.00–27.00% |
| Molybdenum | 1.00–1.50% |
| Titanium | 1.90–2.30% |
| Aluminium | 0.35% max. |
| Vanadium | 0.10–0.50% |
| Boron | 0.003–0.010% |
| Iron | Balance |
The exact chemistry applicable to a supplied product should always be checked against the relevant purchase specification and material certificate.
A286 Properties
The most important A286 properties relate to its ability to combine strength, corrosion resistance and elevated-temperature performance.
High Strength
A286 can be strengthened through appropriate precipitation-hardening heat treatment. This makes it useful for components where higher mechanical strength is required.
Elevated-Temperature Capability
A286 is designed for applications requiring high strength and good corrosion resistance at temperatures up to approximately 1300°F (704°C), depending on the specific application and material condition.
Precipitation Hardening
One of the defining characteristics of A286 is its ability to be precipitation hardened.
Appropriate heat treatment can produce higher strength and allow the alloy to meet demanding engineering requirements.
Corrosion Resistance
A286 offers good corrosion resistance in many environments, making it suitable for applications where both mechanical strength and environmental resistance are required.
High-Temperature Strength
A286 is an age-hardenable alloy used in high-temperature applications including aerospace, energy and industrial equipment. Carpenter Technology identifies aerospace, energy, defense, transportation and industrial applications for the material.
A286 Mechanical and Physical Characteristics
The mechanical properties of A286 depend significantly on:
- Product form
- Heat treatment
- Cold work
- Aging treatment
- Applicable specification
- Product size
- Required material condition
Therefore, buyers should not rely on a single generic tensile-strength figure when ordering A286.
Carpenter Technology notes that A286 can be supplied in different conditions and can develop different strength levels through heat treatment and controlled cold work.
For critical components, the required mechanical properties should be specified on the purchase enquiry.
A286 High-Temperature Performance
One of the strongest reasons engineers select A286 / Alloy 660 is its elevated-temperature capability.
The alloy was designed for applications where high strength and corrosion resistance are required at elevated temperatures.
Carpenter Technology states that A-286 is designed for service requiring high strength and good corrosion resistance up to 1300°F (704°C).
A286 has also been used in:
- Jet engines
- Turbine components
- Superchargers
- High-temperature fasteners
- Aerospace components
- Automotive exhaust components
- Energy equipment
Carpenter’s technical documentation specifically lists turbine wheels and blades, frames, casings, afterburner parts and fasteners among A-286 applications.
A286 Corrosion Resistance
A286 provides useful corrosion resistance in a range of industrial environments.
According to Carpenter Technology’s technical data, A-286 has excellent corrosion resistance up to 1300°F (704°C) against many atmospheres encountered in jet-engine service. The same technical reference notes that actual corrosion performance depends on factors such as temperature, concentration, pH, impurities, aeration, velocity, deposits, metallurgical condition and surface finish.
This is important because no material should be selected based only on a generic corrosion-resistance statement.
For critical applications, the actual operating environment should be reviewed.
A286 Heat Treatment and Precipitation Hardening
A286 is precipitation hardenable, which means its strength can be increased through controlled heat treatment.
This is an important feature of the material because it allows engineers to obtain higher mechanical properties than would be available from an ordinary non-age-hardenable austenitic stainless steel.
The final properties depend on the selected:
- Solution treatment
- Cooling method
- Aging treatment
- Cold-work condition
- Product size
- Applicable specification
Carpenter Technology describes A-286 as capable of being precipitation hardened and strengthened by heat treatment.
For production components, the exact heat-treatment procedure should be established according to the applicable material specification rather than using a generic internet value.
A286 Round Bar Specifications
A286 is available in round-bar form for machining into high-strength engineering components.
When requesting A286 Round Bar, provide:
| Requirement | Example Information |
|---|---|
| Material | A286 / Alloy 660 |
| UNS | S66286 |
| Product | Round Bar |
| Diameter | Required diameter |
| Length | Required length |
| Condition | Required heat-treatment condition |
| Finish | Required surface finish |
| Quantity | kg / pieces / tonnes |
| Specification | Applicable ASTM / AMS / other specification |
| Testing | Required testing |
| Certification | Material test certificate if required |
| Delivery | Destination and required schedule |
Carpenter Technology lists rounds and bars among available A-286 product forms and identifies several applicable specifications, including ASTM A453 and ASTM A638, alongside various AMS specifications.
The applicable specification should always be confirmed against the customer’s exact product and end-use requirement.
A286 Industrial Applications
The properties of A286 make it suitable for demanding industrial components.
Aerospace
A286 has a long history of use in aerospace applications where elevated-temperature strength is important.
Turbine Components
A286 has been used for turbine wheels, blades and associated high-temperature components.
High-Temperature Fasteners
A286 is particularly relevant to high-temperature bolts, studs and other fasteners. Carpenter Technology identifies A-286 as a widely used alloy for high-temperature bolting applications.
Energy Industry
A286 is listed among alloys used in energy applications where strength and temperature performance are required.
Industrial Machinery
The material can be machined into shafts, pins, fasteners, bushings and other engineered components where its specified properties are appropriate.
How to Specify A286 Material
A strong industrial enquiry should avoid using only the commercial name.
Instead of:
“A286 bar required.”
provide:
A286 / UNS S66286 Round Bar
followed by:
- Diameter
- Length
- Quantity
- Required specification
- Heat-treatment condition
- Testing requirements
- Certification requirements
- Delivery location
This helps the supplier understand the exact requirement and prepare a more accurate quotation.
Why A286 Is Selected for Industrial Components
A286 is considered when a project requires a combination of:
High Strength + Corrosion Resistance + Elevated-Temperature Capability + Precipitation Hardening
Its ability to develop high strength through heat treatment makes it useful for demanding components where ordinary stainless steel or conventional alloy steel may not provide the required performance.
The material’s combination of properties is why it appears in aerospace, energy, transportation, defense and industrial applications.
Frequently Asked Questions
What is A286 material?
A286 is an iron-base austenitic precipitation-hardening alloy designed for high-strength and elevated-temperature applications.
What is the UNS number for A286?
The UNS designation for A286 is UNS S66286.
Is Alloy 660 the same as A286?
Alloy 660 / AISI 660 is a designation associated with A286. Carpenter Technology identifies A-286 as AISI No. 660 and UNS S66286.
What is A286 Werkstoff number?
A286 is identified as W.Nr. 1.4980 / DIN 1.4980 in Carpenter Technology’s technical documentation.
Is A286 precipitation hardenable?
Yes. A286 can be precipitation hardened through appropriate heat treatment.
Is A286 suitable for high-temperature applications?
Yes. A286 is designed for high-strength and corrosion-resistant applications at elevated temperatures, with Carpenter Technology citing capability up to approximately 1300°F / 704°C depending on application.
What is A286 used for?
A286 is used in aerospace, turbine, energy, industrial and high-temperature fastener applications.
What affects A286 Round Bar price?
Price depends on diameter, length, quantity, specification, heat-treatment condition, finish, testing, certification, availability and market conditions.
A286 Technical Resources
For engineers and procurement teams researching A286 / UNS S66286 / Alloy 660, the following authoritative technical resources are useful:
Carpenter Technology – A-286 Alloy Finder:
https://www.carpentertechnology.com/alloy-finder/A-286
This resource provides A-286 identification, chemical composition, applications, product forms and applicable specifications.
Carpenter Technology – CarTech A-286 Technical Datasheet:
https://www.carpentertechnology.com/hubfs/7407324/Material%20Saftey%20Data%20Sheets/A-286.pdf
This technical document provides A-286 identification, composition, properties, corrosion information and application details.
Carpenter Technology – High-Temperature Fastener Information:
https://www.carpentertechnology.com/blog/selecting-high-temperature-alloys-for-fasteners
This resource discusses A-286 in high-temperature fastener applications.
Carpenter Technology – Selection of Age-Hardenable Superalloys:
https://www.carpentertechnology.com/blog/selection-of-age-hardenable-superalloys
This provides additional technical context on A-286 and other age-hardenable alloys.
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A286 Material Enquiry
Looking for A286 / Alloy 660 / UNS S66286 for an industrial requirement?
Send Manan Steel & Metals:
- Required material
- UNS designation
- Product form
- Diameter / dimensions
- Length
- Quantity
- Specification
- Heat-treatment condition
- Testing requirements
- Delivery location
Manan Steel & Metals
Shop No. 2, Hira Building, 97 Khetwadi Main Road (Nanubhai Desai Road), Girgaon, Mumbai – 400004, Maharashtra, India
Phone: 7977369869
Email: manansteel@gmail.com
Website: https://www.manansteel.com/
For A286 Round Bar, Alloy 660 and UNS S66286 requirements, send your complete specification for quotation.
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