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Material Specification

Alloy A286

Alloy A286 Fasteners
High-Temperature Precipitation Hardening Superalloy (UNS S66286 / A453 Gr 660 / 1.4980)

High Moly Stainless Steel Alloy A286 Fasteners

Buy Alloy A286 (UNS S66286 / ASTM A453 Grade 660 / AISI 660 / DIN EN 1.4980 / Incoloy® A-286) bolts, studs, nuts, and aerospace-grade fasteners from Exotic Alloy, conforming to ASTM A453 Gr 660 (Class A, B, C, D), ASTM A638, AMS 5731, AMS 5732, AMS 5737, and NACE MR0175. Alloy A286 is an iron-base austenitic precipitation-hardening superalloy formulated with 26% Ni, 15% Cr, 1.25% Mo, and 2.15% Ti, engineered for extreme strength and oxidation resistance up to 700°C (1300°F).

Exotic Alloy manufactures Alloy A286 heavy hex bolts, socket cap screws, high-tensile 12-point bolts, all-thread stud bolts, and custom aerospace fasteners. Widely specified in gas turbines, jet engines, exhaust manifolds, and high-pressure steam boilers, Alloy A286 delivers high creep-rupture strength, high fatigue resistance, and non-magnetic stability.

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Alloy A286 Bolting Products

Alloy A286 Specifications & Standards

  • ASTM A453 Gr 660 (Class A/B/C/D)
  • UNS S66286 / AISI 660
  • ASTM A638 / NACE MR0175
  • DIN EN 1.4980 (X6NiCrTiMoV25-15-2)
  • AMS 5731 / AMS 5732 / AMS 5737
  • Incoloy® Alloy A-286
Alloy A286 Material Datasheet

Alloy A286 Properties

Chemical Composition (Alloy A286)
Elements C Mn P S Si Cr Ni Mo Ti V Al B Fe
Min % - - - - - 13.50 24.00 1.00 1.90 0.10 - 0.003 Balance
Max % 0.08 2.00 0.040 0.030 1.00 16.00 27.00 1.50 2.35 0.50 0.35 0.010 Balance
Mechanical Properties (Alloy A286)
Condition / Heat Treatment Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
Solution Treated & Aged (ASTM A453 Gr 660 Class A) 895 - 1100 585 15 % 24 - 35 HRC / 248 - 341 HB
Solution Treated & Aged (ASTM A453 Gr 660 Class B) 895 - 1100 585 15 % 24 - 35 HRC / 248 - 341 HB

Alloy A286 Characteristics

  • Exceptional high-temperature tensile yield strength and creep-rupture performance up to 700°C (1300°F).
  • High oxidation resistance under continuous and cyclic thermal service up to 815°C (1500°F).
  • Retains fully non-magnetic austenitic characteristics even after severe thermal aging and cold work.
  • High notch-tensile strength, excellent ductility, and fatigue endurance in dynamic bolting.
  • Low-temperature aging heat treatment guarantees high dimensional stability and zero distortion.

Applications

  • Aero-engine turbine casing bolting, jet engine exhaust nozzles, and afterburners.
  • Industrial gas turbine rotor bolting, turbine wheels, and high-temperature flanges.
  • Automotive turbochargers, manifold fasteners, and high-performance racing engine studs.
  • High-pressure steam boilers, superheaters, and nuclear power fasteners.
  • Cryogenic structural bolting and non-magnetic downhole well instruments.