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.

Availability

Alloy 80A is available in Round Bar, Flat Bar, Rod, Tube, Plate, Sheet, Strip, Forging Stock and Wire. For all stock availability contact Sales.

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)

Technical Data

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

Mechanical Properties

Material 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	-

Material Sheet	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 (0.45mm-3.0mm)	280 min
Nimonic 90 sheet Precipitation Treated (BS HR 202)	500	740 (typical)	995 (typical)	30	-
Alloy 90 Cold Rolled Sheet (Heat Treated)

Specifications
UNS N07090
Werkstoff Nr. 2.4632
Werkstoff Br. 2.4969
NiCr20Co18Ti
NCK20TA (AIR 9165)
BS HR2
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

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