Nimonic alloy
Nimonic alloy 90 is a precipitation hardenable nickel-chromium-cobalt alloy strengthened by the addition of Titanium and Aluminium. Alloy 90 has a high stress rupture strength and creep-resistant at temperatures to 920°C. Nimonic Alloy 90 is typically used in extreme stress applications such as turbine blades, hot working tools, exhaust reheaters, disc and high-temperature springs.
heat treatments
Nimonic 90 BarSolution Treatment
1080 °C (1975 °F) for 8 hours + air cool or oil/ water quench
Precipitation Heat Treatment (As per BS HR2)
700 °C (1290 °F) for 16 hours + air cool
Nimonic 90 Sheet
Solution Treatment
1100-1150 °C for 1-10 minutes + air cool or oil /water quench
Stabilization Heat Treatment
925 °C for 1 hour + air cool
Precipitation Heat Treatment
750 °C for 4 hours and air cool
(BS HR202/ MSRR 7016 / Siemens TLV 85252100 do not require the Stabilization Treatment stage)
specifications
BS HR2AMS 5829
UNS N07090
NiCr20Co18Ti
NCK20TA (AIR 9165)
Werkstoff Nr. 2.4632
Werkstoff Br. 2.4969
MSRR 7137, MSRR 7017