UNS N07090 (Nimonic 90)

Short Introduction:

  • Nimonic 90/GB GH90/UNS N07090/BS Nimonic90/W. Nr. 2.4632 is aging strengthen ni-based deformation high temperature ally, with a high amount of cobalt and many kinds of strengthening element, this alloy in 815 ~ 870 °C have high tensile strength and contravariance ability, good oxidation resistance and corrosion resistance, cold and heat alternately repeatedly in under the action of a higher fatigue strength and good formability and weldability. Used for turbine engine turbine dish, leaf, high temperature fasteners, card hoop, seals and elastic components etc.

Category:

Description

UNS N07090 /Nimonic 90

Material grades and equivalents

Nimonic 90/GB GH90/ UNS N07090 / BS Nimonic90/ W. Nr. 2.4632

Nimonic 90 characteristics and application fields of summary:

  • This alloy is aging strengthen ni-based deformation high temperature ally, with a high amount of cobalt and many kinds of strengthening element, this alloy in 815 ~ 870 °C have high tensile strength and contravariance ability, good oxidation resistance and corrosion resistance, cold and heat alternately repeatedly in under the action of a higher fatigue strength and good formability and weldability. Used for turbine engine turbine dish, leaf, high temperature fasteners, card hoop, seals and elastic components etc.

Nimonic 90 chemical ingredients: (GB/T14992-2005):

 %

 Ni

 Cr

 Fe

 Zr

 B

 Co

 C

 Mn

 Si

 S

 Cu

 Al

 Ti

 Min

 Bal

 18.0

 15.0

 1.0

 2.0

 Max

 21.0

 1.5

 0.15

 0.02

 21.0

 0.13

 0.4

 0.8

 0.015

 0.2

 2.0

 3.0

 

Nimonic 90 physical ability:

 density g/cm3

  M.point°C

 Heat transfer Rate λ/(W/m•°C)

specific heat capacityJ/kg•°C

 modulus of elasticityGPa

 shear elasticityGPa

  RμΩ•m

 coefficient of linear expansiona/10-6°C-1

 8.2

 1400

21.76(100°C)

 225

 12.7(20~100°C)

 

Nimonic 90 force ablity:

 Heat treatment

 Tensile Strength σb/MPa

Yield Strength σp0.2/MPa

 Elongationσ5 /%

 HB HBS

Solutiontreatment

 820

 590

 8

Nimonic90 process performance and requirements:

  • 1, the alloy in forging easily produce inside crack, allow hammer blow, don’t allow low temperature chamfering. Ingot outfit furnace temperature is not higher than 700 °C, 1150 °C ± final heating temperature 10 °C, open forging not below 1060 °C temperature, and forging temperature not less than 950 °C.

  • 2, the size of the average grain degrees of alloy forgings and deformation degree, eventually forging is closely related to the temperature.

  • 3, alloy in solid solution state can be inert gas protection electric arc welding and tungsten very flash butt weld.

Specification:

   bar/wire

BS HR2 Nimonic 90 bars, billet, forgings;BS HR501 Nimonic 90 cold drawn wire for springs;BS HR502 Nimonic 90 cold drawn and solution; treated wire for springs; BS HR503 Nimonic 90 wire for thread inserts;AMS 5829;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

 sheet/plate/strip

BS HR202 Nimonic 90 sheet and strip;MSRR 7087;AECMA PrEN 2298;SiemensTLV8525 2100;Siemens TLV8525 31001

Tube

BS HR 402;AECMA PrEN 2299