Incoloy® alloy A-286

UNS S66286
W.Nr 1.4980

Applications

Fasteners and springs.

Description

Incoloy® alloy A-286 is an age-hardenable Iron-Nickel-Chromium alloy with high strength and corrosion resistance at elevated temperatures.  Incoloy® A-286 can operate from cryogenic temperatures up to 750°F.

Industries Supplied

Automotive and Aerospace.

Nominal Composition

Ni: 24.0 - 27.0
Cr: 13.5 - 16.0
Ti: 1.9 - 2.35
Mo: 1.0  - 1.5
Mn: 2.0 max
Si: 1.0 max
Fe: balance
Al: 0.35 max
V: 0.1 - 0.5
C: 0.08 max
S: 0.030 max

Physical Properties

Density: 0.287 lb/in3, (7.94 g/cm3)

Modulus of Elasticity (E): 
At 70°F (20°C): 28.8 x 103 ksi (199 GPa)

Modulus of Rigidity (G): 
At 70°F (20°C): 11.2 x 103 ksi (77.0 GPa)

Coefficient of Expansion:
9.47 µin/in.-°F (70°F to 600°F)
17.0 µm/m-°C (20°C to 300°C)

Electrical Resistivity: 35.8 µΩ.in, (91 µΩ.cm)

Thermal Conductivity: 88 Btu-in/ft2hr-°F, (12.7 W/m-K)

Applicable Specifications

Wire & Bar: AMS 5726, AMS 5731, AMS 5732, AMS 5734, AMS 5737, AMS 5804, AMS 5805, AMS 5810, AMS 5853, ASTM A638, NACE MR0175 (ISO 15156-3).

Typical Mechanical Properties – Spring Applications

  • Annealed
    • Heat Treatment: 1800°F (980°C)
    • Tensile Strength: 80 - 110 ksi; (550-760 MPa)
    • Suggested Operating Conditions: -300°F to 750°F (-184°C to 400°C)

  • Annealed + Aged
  • Heat Treatment:  After spring coiling.  Age: 1300 - 1400°F (704°C to 760°C) for 16 hours.
  • Tensile Strength: 160 - 190 ksi; (1100 - 1300 MPa)
  • Suggested Operating Conditions: -300°F to 750°F (-184°C to 400°C)

  • Spring Temper
  • Tensile Strength: 160 – 190 ksi; (1100 – 1310 MPa)
  • Suggested Operating Conditions: -300°F to 750°F (-184°C to 400°C​)

  • Spring Temper + Aged
  • Heat Treatment: After spring coiling. Age: 1300 - 1400°F (704°C to 760°C) for 8 hours
  • Tensile Strength: 200 - 240 ksi; (1379 - 1655 MPa)
    • Suggested Operating Conditions: -300°F to 750°F (-184°C to 400°C​)

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    Incoloy® is a registered trade mark of the Special Metals Corporation group of companies.

    For further information Contact:

    Email: wireinfo@elgiloy.com
    Phone: 1 847 695 1900 
    Elgiloy Specialty Metals - Wire Products
    356 N.Cross Street
    Sycamore, IL 60178 USA