Nickel Alloy 90/ Nimonic 90®

Technical Data Sheet

Chemical Composition Limits
Weight % Ni Cr Co Ti Al C Si Cu Fe Mn B S Zr Pb
Alloy 90 Bal 18-21 15-21 2-3 1-2 0.2 max 1.0 max 0.2 max 1.5 max 1.0 max 0.02 max 0.015 max 0.15 max 0.0020 max

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.

The recommended heat treatments for Nimonic 90 are as follows:
Nimonic 90 Bar
Solution 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)

Typical Mechanical Properties

Extruded Bar
Temperature °C Yield Strength 0.2 % (MPa) Tensile Strength (MPa) Elongation (%) Hardness HV
Nimonic 90 bar
Solution Treated (BS HR2)
RT - - - 295 max
Nimonic 90 bar
Precipition Treated (BS HR2)
RT 695 min 1080 min 20 min 310 min
Nimonic 90 Bar
Precipitation Treated (BS HR2)
500 672 (typical) 1038 (typical) 31 -

Temperature °C Yield Strength 0.2 % (MPa) Tensile Strength (MPa) Elongation (%) Hardness HV
Nimonic 90 sheet
Solution Treated (BS HR202)
RT - - - 250 max
Nimonic 90 sheet
Precipitation Treated
(BS HR202)
RT 695 min 1080 min 25 min
280 min
Nimonic 90 sheet
Precipitation Treated
(BS HR 202)
500 740 (typical) 995 (typical) 30 -
Alloy 90 Cold Rolled Sheet
(Heat Treated)

Nimonic Alloy 90 (Nimonic 90) is available in sheet, strip, plate, bar, round bar, flat bar, wire, forging stock, tube, welding wire and extruded section. For all stock availability contact Sales.

UNS N07090
Werkstoff Nr. 2.4632
Werkstoff Br. 2.4969
NCK20TA (AIR 9165)
AMS 5829
MSRR 7137, MSRR 7017

Nimonic 90 bar/wire Nimonic 90 sheet/plate/strip Nimonic 90 Tube
BS HR2 Nimonic 90 bars, billet, forgings BS HR202 Nimonic 90 sheet and strip BS HR 402
BS HR501 Nimonic 90 cold drawn wire for springs MSRR 7087 AECMA PrEN 2299
BS HR502 Nimonic 90 cold drawn and solution treated wire for springs AECMA PrEN 2298  
BS HR503 Nimonic 90 wire for thread inserts Siemens TLV8525 2100  
AMS 5829
Siemens TLV8525 31001  
AECMA PrEN 2295    
AECMA PrEN 2296    
AECMA PrEN 2297    
AECMA PrEN 2400    
AECMA PrEN 2401    
AECMA PrEN 2669    
AECMA PrEN 2670    
MSRR 7016    
MSRR 7137    
Siemens DL 1641-1    
ABB Stal 63 73 01    

At Aircraft Materials we specialise in the rapid turn-around of orders, with most stock items ready for shipping out the same day to anywhere in the world. For time-critical orders, such as AOGs use our AOG service desk (, the team are dedicated to processing and dispatching orders on the same day, even for cutting orders on bar and sheet products.

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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.