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A286 is a precipitation age-hardening iron-nickel-chromium alloy that is one of the most popular and widely used of high temperature alloys. It maintains good strength with oxidation resistance at temperatures of up to 1300F. A286 is used in various components, such as aircraft and industrial gas turbines due to is high strength and superior fabrication. A286 is also very popular in offshore oil and gas industry where high levels of heat and stress are a factor.
The work hardening of A286 is equivalent to 310S Stainless, and cold working is possible at the same level.
A286 has superior corrosion resistance beyond the standard 304 and 304L. This does not change after the aging process.
A286 is harder to work with than 316 and 310 stainless, however A286 can still be cold-worked with positive results. However, compared with other high-temperature alloys A286 is much easier to machine.
A286 solution treated AMS 5731 (AMS 5732 capable)
Solution Heat Treatment: 1800ºF ± 25 (982 ± 14ºC) 1 hour, water/oil quench (AMS) Hardness: ≥ 217HB or 220 HB (BS), ≥201HB (AMS)
A286 Solution Treated and Aged is covered by specifications AMS 5732, BS HR51, ASTM A638 660 Type 2, ASTM A453 660 Class B
Solution Heat Treatment:
980ºC ± 10 for > 1 hour, followed by air cool (BS)
1800ºF ± 25 (982 ± 14ºC) 1 hour, water/oil quench (AMS)
Precipitation Heat Treatment:
720ºC ± 10 > 16 hours, followed by air cool (BS)
1300-1400 ºF (704-760ºC) hold not less 16 hours, air cool (AMS)
Hardness:
248 - 341 HB or 260 - 360 HV (BS)
248-341 HB (AMS)