ATI A286™ alloy (UNS S66286) is a Ni-Cr austenitic precipitation-hardened iron-based steel that is one of the original superalloys. It has been used for applications requiring high strength and corrosion resistance up to 1,300°F (704°C), and for cryogenic applications. Its relatively low alloy content and low-cost formulation make it an excellent choice for many applications. ATI A286™ alloy is produced by vacuum induction melting (VIM), followed by vacuum arc (VAR) or electroslag (ESR) remelting. Applications include jet engine, supercharger, and missile components including: wheels and blades, casings, afterburner and sound suppressor parts, fuel nozzles, fasteners, extrusion tooling and miscellaneous hardware This alloy is designated Grade or Type 660 in several specifications.
SPECIFICATIONS - AMS
• AMS 5525 - Sheet, Strip, and Plate
• AMS 5858 - Sheet, Strip, and Plate
• AMS 5731 - Bars, Rings, Forgings and Tubing (1,800°F Solution Treatment)
• AMS 5732 - Bars, Rings, Forgings and Tubing (1,800°F Solution Treatment + Age)
• AMS 5734 - Bars, Rings, Forgings and Tubing (1,650°F Solution Treatment)
• AMS 5737 - Bars, Rings, Forgings and Tubing (1,650°F Solution Treatment + Age)
• ASTM A453 - Bolting
• ASTM A638 - Forgings, forging stock and bar
• ASME SA-638 - Forgings, forging stock and bar
PHYSICAL PROPERTIES
Melting Range: 2,500-2,600°F (1,371 - 1,427°C)
Density: 0.287 lbs./cu. in. (7.94 g/cm3).
HEAT TREATMENT
Two solution treatments are used. 1,650°F (899°C) for 2 hours with water or oil quench is used where higher tensile and yield strengths are desired.