Name: Incoloy A-286
Brand: Incoloy

Material Overview

Incoloy A-286 material profile

A concise grade introduction for buyers who need to confirm composition, properties, standards, available forms and suitable applications before sending an inquiry.

Engineering profile

Incoloy A-286, designated UNS S66286, is an age-hardenable austenitic iron-nickel-chromium superalloy developed for high strength, oxidation resistance and reliable mechanical performance from cryogenic temperatures to approximately 700 °C. Titanium, aluminum and vanadium enable precipitation hardening, while chromium and nickel provide oxidation resistance and corrosion resistance comparable with many austenitic stainless steels. The alloy is widely used for aircraft and industrial gas-turbine components, compressor parts, afterburner hardware, shafts, springs, pressure components and high-temperature bolts, studs and other fasteners.

Technical data on this page is for material selection reference. Final acceptance values should be confirmed by the purchase standard, heat treatment condition, product form, size and material test certificate.

Chemical Composition

Incoloy A-286 composition range

The following table shows common limiting composition values for Alloy 625 / UNS N06625. Actual product chemistry is reported by heat on the material test certificate.

Element	Symbol	Composition, wt.%	Role in Alloy A-286
Nickel	Ni	24.0-27.0	Stabilizes the austenitic structure and supports toughness and elevated-temperature performance.
Chromium	Cr	13.5-16.0	Provides oxidation resistance and general corrosion resistance.
Titanium	Ti	1.90-2.35	Principal precipitation-hardening addition responsible for high aged strength.
Molybdenum	Mo	1.0-1.5	Provides solid-solution strengthening and supports elevated-temperature strength.
Vanadium	V	0.10-0.50	Contributes to precipitation response and high-temperature mechanical properties.
Boron	B	0.003-0.010	Improves grain-boundary strength and stress-rupture performance.
Aluminum	Al	0.35 max	Participates in precipitation hardening together with titanium.
Carbon	C	0.08 max	Controlled for carbide formation, ductility and processing.
Manganese	Mn	2.0 max	Controlled minor alloying and deoxidizing element.
Silicon	Si	1.0 max	Controlled for processing and weldability.
Cobalt	Co	1.0 max	Controlled residual element.
Phosphorus	P	0.025 max	Controlled residual element for ductility and hot workability.
Sulfur	S	0.015 max	Restricted to improve hot workability and weld quality.
Iron	Fe	Balance	Forms the base of the austenitic superalloy matrix.

Physical Properties

Key physical and thermal data

These values help customers compare density, thermal behavior, magnetic response and conductivity during early material selection.

Property	Metric Value	Imperial Value	Condition / Notes
Density	7.94 g/cm3	0.287 lb/in3	Solution treated and aged
Melting Range	1371-1427 °C	2500-2600 °F	Typical range
Specific Heat	420 J/kg·°C	0.10 Btu/lb·°F	Room-temperature typical value
Thermal Conductivity	Approx. 15.1 W/m·K	Approx. 105 Btu·in/ft²·h·°F	Approx. 150 °C
Electrical Resistivity	0.91 µΩ·m	Approx. 548 ohm-cmil/ft	Approx. 25 °C
Modulus of Elasticity	201 GPa	29.1 x 10³ ksi	Approx. 24 °C, dynamic method
Shear Modulus	77 GPa	11.2 x 10³ ksi	Approx. 24 °C
Mean Coefficient of Thermal Expansion	16.5 µm/m·°C	9.17 x 10^-6 in/in·°F	Mean value from approximately 21 to 93 °C
Magnetic Permeability	Approx. 1.007	Essentially non-magnetic	Solution treated and aged

Mechanical Properties

Room-temperature mechanical properties

Mechanical properties vary with product form, size, processing route and heat treatment. The table below summarizes commonly referenced nominal values for material selection.

Product Form / Condition	Tensile Strength	Yield Strength, 0.2%	Elongation	Hardness / Notes
Plate, sheet and strip – solution annealed	724 MPa (105 ksi) max	Specification dependent	25% min	90 HRB max; representative annealed delivery requirements
Plate, sheet and strip – precipitation hardened	965 MPa (140 ksi) min	655 MPa (95 ksi) min	15% min	24-35 HRC; representative AMS 5525 requirements
Bar and forging – 982 °C solution treated and aged	Approx. 895 MPa (130 ksi) min	Approx. 585 MPa (85 ksi) min	Approx. 15% min	Representative AMS 5732-type requirements; size provisions apply
Bar and forging – 899 °C solution treated and aged	Specification dependent	Specification dependent	Specification dependent	Normally selected when higher room-temperature tensile and yield strength is required
ASTM A453 Grade 660 bolting	Class dependent	Class dependent	Class dependent	Classes A, B, C and D have different heat treatments and mechanical requirements
Solution-treated material	Condition and size dependent	Condition and size dependent	Typically higher ductility	Approx. 140-180 HB before precipitation aging
Solution-treated and aged material	Specification dependent	Specification dependent	Lower than solution-treated condition	Typical hardness approximately 248-321 HB

Mechanical properties depend strongly on melting practice, product form, dimensions, solution-treatment temperature and aging cycle. Values shown are representative or specification-based and must be confirmed against the applicable AMS or ASTM standard and material test certificate. Design values for elevated-temperature or stress-rupture service must come from the governing engineering code or approved material database.

For pressure equipment, aerospace parts or project-specific acceptance, use the minimum requirements in the specified ASTM, ASME, AMS, EN or customer drawing rather than nominal values.

Standards & Specifications

Common Incoloy A-286 standards by product form

YSN128 can quote Alloy 625 products according to ASTM, ASME, AMS, EN, DIN, ISO or customer drawing requirements. Certificate scope can be matched to the purchase order.

Product Form	Common Standards	Heat-Treatment / Supply Basis	Certificate / Inspection
Plate, Sheet and Strip	AMS 5525, AMS 5858	Solution annealed or solution annealed and precipitation hardened	EN 10204 3.1 MTC, chemistry, tensile test, hardness and heat-treatment record
Bar, Wire, Rings and Forgings	AMS 5731	982 °C solution treated; supplied for subsequent precipitation hardening	MTC, remelting record, tensile test, grain inspection and dimensional inspection
Bar, Wire, Rings and Forgings	AMS 5732	982 °C solution treated and precipitation hardened	Tensile, hardness, stress-rupture and heat-treatment records as required
Bar, Wire, Rings and Forgings	AMS 5734	899 °C solution treated; supplied for subsequent precipitation hardening	MTC, chemistry, tensile test, hardness and dimensional inspection
Bar, Wire, Rings and Forgings	AMS 5737	899 °C solution treated and precipitation hardened	Tensile, hardness and heat-treatment records as specified
Bars, Forgings and Forging Stock	ASTM A638 / ASME SA638 Grade 660	Solution treated and precipitation hardened for high-temperature service	Chemistry, tensile, hardness, stress-rupture and metallurgical testing as specified
High-Temperature Bolting	ASTM A453 / A453M Grade 660	Class A, B, C or D according to required strength and processing	MTC, tensile test, hardness, heat-treatment record and lot traceability
Mechanical Tubing	AMS 5731, AMS 5732, AMS 5734 or AMS 5737	Condition selected by required strength, fabrication sequence and service	MTC, dimensions, surface inspection and NDT when specified
Welding Wire	AMS 5804	A-286 chemistry welding wire for qualified aerospace and industrial procedures	Consumable certificate, chemistry, diameter inspection and lot traceability

Available Product Forms

Incoloy A-286 supply range

Review available product forms, size ranges, standards and delivery options for this alloy.

Form	Common Size Range	Delivery Condition	Typical Applications	Page Link
Pipe & Tube	OD 6-300 mm, wall thickness and custom mechanical-tubing sizes to specification	Seamless mechanical tubing, solution treated or solution treated and aged	Aerospace sleeves, high-temperature ducts, shafts and precision tubular components	View Pipe & Tube
Round Bar	Diameter 3-300 mm, larger billet and forged sizes available	Hot rolled, forged, solution treated, aged, peeled or ground	Shafts, turbine hardware, fasteners, rings and machined high-strength parts	View Round Bar
Sheet & Plate	Thickness 0.5-100 mm, custom widths, lengths and cut parts	Solution annealed or solution annealed and precipitation hardened	Afterburner components, casings, heat shields and gas-turbine hardware	View Sheet & Plate
Strip & Foil	Thickness 0.02-3 mm, slit widths and coil weights to specification	Cold rolled, solution annealed, spring temper or aged	Springs, clips, diaphragms, seals and formed aerospace components	View Strip & Foil
Wire	Diameter 0.1-12 mm, coil, spool or straight-length supply	Cold drawn, annealed, spring temper or precipitation hardened	Springs, retaining wire, screens, formed parts and fastener production	View Wire
Fasteners	Standard and custom bolts, nuts, screws, studs and washers	ASTM A453 Grade 660 or AMS condition, machined or thread rolled	Turbines, pressure vessels, exhaust systems and high-temperature flanges	View Fasteners
Fittings	Drawing-based fittings, sleeves, connectors and precision-machined parts	Machined or fabricated, solution treated and aged as specified	Aerospace systems, turbine assemblies and high-temperature connections	View Fittings
Flanges	Standard-interface and custom drawing dimensions	Forged, solution treated, aged, machined and inspected	Turbine systems, pressure equipment and high-temperature bolted joints	View Flanges
Forgings	Rings, discs, blocks, shafts, billets and drawing-based forgings	Forged, solution treated, aged, rough or finish machined	Turbine wheels, shafts, rings, structural hardware and pressure components	View Forgings
Welding Wire	Diameter 0.8-4.0 mm, spool, coil or straight-length supply	AMS 5804 chemistry, clean bright finish and precision drawn	Joining thin-section A-286 components and qualified aerospace repair procedures	View Welding Wire

Material Selection Guide

When to consider Incoloy A-286

This guide helps buyers connect service conditions with the typical advantage of Alloy 625. Final selection should consider medium concentration, temperature, pressure, fabrication, availability and budget.

Service Requirement	Why Alloy A-286 Helps	Common Product Form	Buyer Note
High strength up to approximately 700 °C	Precipitation hardening develops high tensile, yield and stress-rupture strength.	Bar, forging, sheet, fastener and ring	Specify temperature, load, required life and the governing AMS or ASTM condition.
High-temperature bolting	Combines high aged strength with thermal expansion comparable to austenitic stainless steels.	Bolt, stud, nut, screw and washer	State ASTM A453 Grade 660 class, dimensions, thread method and testing requirements.
Gas-turbine components	Provides useful strength, oxidation resistance and fabricability for rotating and static hot-section hardware.	Forging, bar, sheet, ring and fastener	Provide the applicable AMS specification, remelting requirement and OEM approval.
Cryogenic high-strength components	The stable austenitic structure retains useful ductility and strength at low temperatures.	Bar, forging, fastener, sheet and wire	Specify the minimum temperature, impact-testing requirement and final heat treatment.
Oxidizing and sulfur-bearing atmospheres	Chromium provides oxidation resistance, while the iron-rich composition performs well in selected sulfurous atmospheres.	Sheet, plate, fastener and fabricated component	Confirm atmosphere chemistry, metal temperature and thermal-cycle frequency.
Parts requiring forming before aging	The solution-treated alloy has better ductility and can be precipitation hardened after forming.	Sheet, strip, wire, tube and forged blank	Plan forming, machining, welding and final aging as one controlled manufacturing sequence.

Why Choose Us

Supply and quality support for Incoloy A-286

For ranking traffic, buyers need more than a data sheet. This section gives clear trust signals for procurement, engineering and quality teams.

STASTM / ASME / AMS / EN

Quotation can be matched to project standards and product form specifications.

MTEN10204 3.1 MTC

Heat number, chemistry, mechanical properties and inspection records can be supplied.

QCPMI & Inspection

PMI, UT, dimensional inspection, visual inspection and packing check are available.

CSCustom Size

Cutting, machining allowance, rough machining and drawing-based supply can be arranged.

EPExport Packing

Wooden case, bundle, waterproof protection and international shipping documents.

RFFast Technical Reply

Send grade, size, standard, quantity and destination for a practical quotation route.

Related Nickel Alloys

Compare nearby grades and product forms

Explore related grades and product forms for comparison.

Incoloy Incoloy 825

Incoloy 825, designated UNS N08825, is a titanium-stabilized nickel-iron-chromium alloy containing molybdenum and copper for resistance to a wide range of corrosive environments. Its nickel,...

Incoloy Incoloy 800

Incoloy 800, designated UNS N08800, is an austenitic nickel-iron-chromium alloy combining corrosion resistance, heat resistance, strength and metallurgical stability. Its nickel content helps resist chloride-ion...

Incoloy Incoloy 800H

Incoloy 800H, designated UNS N08810, is a controlled-carbon nickel-iron-chromium alloy developed for prolonged service at elevated temperatures. Its higher carbon range and controlled coarse-grain structure...

Incoloy Incoloy 800HT

Incoloy 800HT, designated UNS N08811, is a controlled-composition nickel-iron-chromium alloy developed for long-term service at elevated temperatures. Its specified carbon content, higher combined aluminum and...

FAQ

Incoloy A-286 questions from buyers

Find practical answers about procurement, standards, fabrication and industrial applications.

Incoloy A-286 is used for aircraft and industrial gas-turbine components, compressor parts, afterburner hardware, shafts, rings, springs, pressure components and high-temperature bolts, studs, nuts and other fasteners.

Yes. UNS S66286 is the standardized UNS designation for Alloy A-286. The alloy may also be identified as Grade 660, Werkstoff 1.4980 or X6NiCrTiMoVB25-15-2.

A typical cycle uses solution treatment at either 899 °C for approximately two hours or 982 °C for approximately one hour, followed by water or oil quenching. Aging is commonly performed between 704 and 760 °C for approximately 16 hours followed by air cooling. The exact cycle must follow the selected AMS, ASTM or customer specification.

Grade 660 is the A-286-type high-temperature bolting grade covered by ASTM A453/A453M. Classes A, B, C and D use different processing and mechanical requirements, so the required class must be included in the purchase order rather than specifying Grade 660 alone.

We can quote plate, sheet, strip, foil, round bar, rod, wire, mechanical tubing, fasteners, custom fittings, flanges, forgings, rings and welding wire. Supply is available in solution-treated, aged or project-specified conditions.

AMS 5525 and AMS 5858 cover flat products, while AMS 5731, 5732, 5734 and 5737 cover bar, wire, forgings, rings and mechanical tubing in different heat-treatment conditions. ASTM A638 covers Grade 660 bars and forgings, ASTM A453 covers Grade 660 bolting, and AMS 5804 covers welding wire.

A-286 can be welded most successfully in the solution-treated condition, particularly in thin sections or joints with low restraint. The alloy is susceptible to hot cracking, especially when welded in the aged condition. A qualified procedure must address joint restraint, heat input, filler selection and any required post-weld solution treatment and aging.

Please provide UNS S66286, product form, dimensions, quantity, applicable AMS or ASTM specification, heat-treatment condition, melting or remelting requirement, mechanical properties, certificate type and destination. For fasteners, also specify ASTM A453 class, thread form, coating, inspection and testing requirements.

Incoloy A-286