Inconel Alloy A286 Fasteners

Iron-Nickel-Chromium Precipitation Hardening Superalloy

Buy Inconel Alloy A286 (UNS S66286 / DIN 1.4980 / ASTM A453 Grade 660) bolts, stud bolts, heavy hex nuts, and custom CNC fasteners from Exotic Alloy. A286 is an iron-nickel-chromium alloy strengthened by precipitation hardening (age-hardening), offering high tensile strength at temperatures up to 700°C (1300°F). It conforms to ASTM A453, AMS 5731, AMS 5732, AMS 5737, and DIN EN 10269.

Exotic Alloy's A286 fasteners deliver outstanding creep resistance and fatigue strength for aerospace turbines, jet engine casings, and high-temperature pressure vessel bolting. Available in metric and imperial sizes from M6 to M100 / ¼" to 4".

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Product Range

Alloy A286 Fasteners Available

Alloy A286
Hex Bolts

Alloy A286
Heavy Hex Bolts

Alloy A286
Stud Bolts

Alloy A286
Threaded Rods

Alloy A286
Anchor Bolts

Alloy A286
Hex Nuts

Alloy A286
Washers

Alloy A286
Cotter Pins

Alloy A286
Springs

Alloy A286
Circlips

Alloy A286
Coated Fasteners

Alloy A286
Custom Spacers

Technical Data

Alloy A286 Specifications

Chemical Composition — Inconel Alloy A286 (wt. %)

Element	Ni	Cr	Fe	Mo	Ti	Al	V	B	Mn	Si	C
Min %	24.00	13.50	Balance	1.00	1.90	–	0.10	0.003	–	–	–
Max %	27.00	16.00	Balance	1.50	2.35	0.35	0.50	0.010	2.00	1.00	0.08

Mechanical Properties — Inconel Alloy A286

Condition	UTS (MPa)	YS 0.2% (MPa)	Elongation (%)	Hardness
Solution Annealed + Aged (Class A)	895	585	15	≤ 35 HRC
Solution Annealed + Aged (Class B)	1000	690	12	≤ 38 HRC
Solution Annealed + Aged (Class D)	1140	895	10	≤ 42 HRC

Physical Properties

Density	7.92 g/cm³
Melting Range	1370–1400°C (2500–2550°F)
Specific Heat Capacity	500 J/kg·K at 20°C
Thermal Conductivity	12.8 W/m·K at 20°C
Thermal Expansion	16.6 µm/m·°C (20–900°C)
Electrical Resistivity	0.91 µΩ·m

Equivalent Grades & Standards

UNS	Werkstoff / DIN	EN / BS	AFNOR
S66286	1.4980	EN 10269	Z8NCTDV26-15

Key Specifications: ASTM A453 Gr. 660 / AMS 5731 / AMS 5737

Machinability: A286 work-hardens significantly during machining. Use slow speeds, heavy feeds, rigid setups, and positive rake carbide inserts. High-pressure sulfurized cutting oil is essential to dissipate heat. Keep the tool in the cut; dwelling causes rapid work hardening.

Welding: A286 is weldable by GTAW (TIG) and EBW. Use matching A286 or AMS 5804 filler wire. Post-weld solution anneal followed by aging is recommended to fully restore mechanical properties in the heat-affected zone.

Forging: Hot forge between 1120–1175°C (2050–2150°F). Avoid forging below 982°C (1800°F). Reheat promptly if metal cools below forging temperature.

Heat Treatment: Solution anneal at 980°C (1800°F) for 1–2 hours, water quench or rapid air cool, then age at 720°C (1325°F) for 16 hours, air cool to achieve full precipitation hardening.

A286 exhibits excellent resistance to oxidizing acids, sulfur-bearing atmospheres, and atmospheric corrosion up to 650°C (1200°F). Nickel and chromium content guard against scale and intergranular attack in thermal cycling service.

Key Characteristics

Outstanding high-temperature strength and oxidation resistance.
Excellent resistance to pitting, crevice corrosion, and intergranular attack.
High fatigue and thermal-fatigue strength in cyclic temperature service.
Superb resistance to chloride-ion stress-corrosion cracking.
Maintains structural integrity from cryogenic to extreme high-temperature service.

Typical Applications

Aerospace engineering: jet engine turbine blades, discs, and casings.
Chemical processing: reactor vessels, pressure containment bolting.
Marine and subsea: offshore wellhead, Christmas tree, HPHT connectors.
Nuclear power: reactor core hardware, primary coolant system fasteners.
Power generation: steam turbine bolting, ultra-supercritical boiler components.

Alloy A286