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Alloy A286 Nickel Sheet, Coil & Bar - AMS 5525, 5858, 5731, 5732, 5737


Incoloy Alloy® A-286 (sometimes referred to as A286 stainless steel) is a nickel and iron-based, austenitic superalloy that is useful for applications requiring high strength and corrosion resistance up to 1300˚F (704˚C), and for lower stress applications at higher temperatures.  The mechanical properties of this alloy are developed by suitable solution annealing and precipitation hardening treatments. 

This alloy has excellent high temperature oxidation resistance and is designed to maximize creep and stress rupture properties, with some reduction in strength.  A-286 material can attain high strength levels when aged after cold work, and has wide applications in high temperature fasteners and springs.

Product

Standard Inventory Specifications

A-286 sheet, coil and bar stock

  • UNS S66286

A-286 sheet

  • AMS 5525
  • AMS 5858
A-286 bar
  • AMS 5731
  • AMS 5732
  • AMS 5737
  • ASTM A 638

Other industry standards we comply with

  • ASTM A 453
  • ASME SA 453
  • EN 1.4980
  • DIN EN 10204 3.1
  • PWA-LCS
  • GE-S400/1000
  • RR SABRe Edition 2
  • DFARS Compliant

Common Trade Names

Incoloy Alloy A286 (® Special Metals), Pyromet Alloy A-286 (® Carpenter Technology), ATI A286 (™ Allegheny Technologies)

Industry Applications

Jet engine components, fasteners, springs, bolts, flanges, blades, afterburners, automotive applications, offshore oil & gas, moderate corrosion applications in aqueous solutions, and non-magnetic cryogenic equipment

Inventory Size Range

  • Sheet : 0.016" - 0.130"
  • Round Bar : 0.250" - 6.000"

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Chemical Composition

A-286 chemical composition;
Element Percent by Weight
Carbon 0.08 maximum
Manganese 2.00 maximum
Phosphorus 0.025 maximum
Sulfur 0.025 maximum
Silicon 1.00 maximum
Chromium 13.50 - 16.00
Nickel 24.00 - 27.00
Molybdenum 1.00 - 1.50
Titanium 1.90 - 2.35
Vanadium 0.10 - 0.50
Aluminum 0.35 maximum
Boron 0.003 - 0.010
Iron Balance

Resistance to Corrosion and Oxidation

Type A286 alloy content is similar in chromium, nickel, and molybdenum to some of the austenitic stainless steels. Consequently, this alloy possesses a level of aqueous corrosion resistance comparable to that of the austenitic stainless steels. In elevated temperature service, the level of corrosion resistance to atmospheres such as those encountered in jet engine applications is excellent to at least 1300°F (704°C). Oxidation resistance is high for continuous service up to 1500°F (816°C) and intermittent service up to 1800°F (982°C).

Alloy A286 Physical Properties

Physical properties

  Solution Treated Solution Treated and Aged
Density 0.286 lb./in3 (7.92 g/cm3) 0.287 lb./in3 (7.94 g/cm3)
Specific Gravity 7.92 7.94
Melting Range 2500 - 2600 °F 1370 - 1430 °C
Magnetic Permeability 1.010 1.007

Thermal Conductivity

Temperature Range Linear Coefficients of Thermal Expansion · 10-6
°C °F /°C /°F
21 - 93 70 - 200 16.5 9.17
21 - 204 70 - 400 16.8 9.35
21 - 316 70 - 600 17.0 9.47
21 - 427 70 - 800 17.4 9.64
21 - 538 70 - 1000 17.6 9.78
21 - 649 70 - 1200 17.8 9.88
21 - 760 70 - 1400 18.6 10.32

Thermal Conductivity

Temperature Range Coefficients
°C °F W/m·K Btu/(hr/ft²/in/°F)
150 302 15.1 8.7
300 572 17.8 10.3
500 932 21.8 12.6
600 1112 23.9 13.8

Specific Heat

420 Joules/kg °K (Btu/lb/°F)

Electrical Resistivity

Temperature microhm-cm
°C °F
25 77 91.0
540 1004 115.6
650 1202 118.8
730 1346 120.1
815 1499 122.4

Mechanical Properties and Yield Strength of A286 

Type A286 alloy is formed most easily in the solution treated condition. Typical room temperature tensile properties of material solution treated at 1800°F (982°C) are shown below.

  • Yield Strength: 40,000 psi (275 MPa)
  • Ultimate Tensile Strength: 90,000 psi (620 MPa)
  • Elongation: 40%

 

Additional information about A286

For many decades, stainless steels have been a popular material for modern fasteners, providing good strength and long term resistance to corrosion.  Manufacturing processes have made them economical and ubiquitous, but they cannot match the strength of alloy steel bolts and fasteners.  4xx grades of stainless steel had the strength, but not the corrosion resistance of austenitic 3xx grades, and A-286 was one of the earliest and most versatile nickel alloys used to replace these stainless steels in high strength fastener applications.

It is a high Cr-Ni alloy (with crucial additions of molybdenum and titanium) capable of retaining high strength at temperatures up to 1000F and can be heat treated to a high tensile strength.  Our A-286 round bar stock and sheet formulations are ideal for manufacturing hex bolts, nuts, screws and washers.

The advantages of cold working A286 can optimize total use of the material while increasing strength.  Hot working and forming of A286 is sometimes used for larger diameter fasteners where it remains more resistant to deformation than 3xx grades of steel.  It is somewhat more difficult to machine than these grades, but still easier than other nickel based precipitation-hardening alloys like 718, and is most often machined in full or partially aged condition.

Welding A-286 is mainly done in thin walled sections, as heavier sections are susceptible to hot cracking.  AMS 5858 is designed and supplied for welding.

A-286 is also frequently used in gas turbines for low pressure buckets and first and second stage turbine wheels, as it retains strength and corrosion resistance at high temperatures.  This also makes it ideal for afterburner construction and exhaust nozzles.  A-286 material is also used by automotive manufacturers in exhaust valves and manifold fasteners for its tensile strength, creep strength and corrosion resistance.

We are A286 distributors for sheet, coil and round bar stock with the experience to help you purchase the right product for the right job.  For a price on our in-stock inventory please contact us for a quote.


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