Gh90 / Uns No7090 / Age-Strengthened Cobalt-Nickel-Based Wrought Superalloy / Nimonic90 /

• Application: Industrial
• Standard: GB, ASTM
• Purity: >99.5%
• Alloy: Alloy
• Powder: Not Powder
• Transport Package: Wooden
• Model NO.: XD-174
• Origin: Jiangsu Baoying
• HS Code: 7505120000
• Production Capacity: 500ton/Year

Product Description

Nimonic90 is an age-strengthened cobalt-nickel-based wrought superalloy containing a relatively high amount of cobalt and various strengthening elements.

Name in countries:

United States: UNS No7090
UK: Nimonic90
China: GH90

Characteristic:

The alloy is an aging-strengthened cobalt-nickel-based deformed superalloy.

The alloy has high tensile strength and creep resistance at 815 to 870 °C, good oxidation resistance and corrosion resistance, and has relatively good performance under the repeated alternating action of cold and heat.

High fatigue strength and good formability and weldability. Used in turbine engine turbine disks, blades, high temperature fasteners, clamps, sealing rings and elastic elements, etc.

Chemical composition
alloy grade       %           Ni        Co      Cr     Fe      Zr      B       C      Mn    Si      S         P    Cu    Al      Ti
GH90         minimum  margin   15.0   18.0                                                                                     1.0    2.0
                  maximum                21.0   21.0   1.5   0.15   0.02   0.13   0.4   0.8  0.015  0.02   0.2   2.0   3.0

physical properties

density  g/cm3                                                                 8.2

melting point  °C                                                            1400

Thermal conductivity  λ/(W/m·ºC)                             21.76(100ºC)

specific heat capacity  J/kg·ºC   

Elastic Modulus  GPa                                                     225

Shear modulus  GPa 

Resistivity μΩ·m

Poisson's ratio

Linear expansion coefficient  a/10-6ºC-1             12.71(20~100ºC)

Mechanical properties

(Minimum value of mechanical properties detected at 20°C)

Heat treatment method            tensile strength  σb/MPa    Yield Strength  σp0.2/MPa   Elongation  σ5 /%   Brinell hardness  HBS 
Solution treatment                               820                                           590                               8

Metallographic structure
The main strengthening phase of the alloy is γ'-Ni3 (Ti, Al), which is precipitated in the grain as square particles of different sizes, and the γ' phase of this shape can also be seen on the grain boundary. Discontinuous chain-like precipitation.

Process requirements

1. The alloy is prone to internal cracks during forging, allowing heavy hammer blows. The ingot loading temperature is not higher than 700ºC, the low temperature area is preheated for 20-30 minutes, the final heating temperature is 1150ºC-1180ºC, the opening forging temperature is not lower than 1050ºC, and the final forging temperature is not lower than 950ºC.

2. The average grain size of the alloy is closely related to the deformation degree of the forging and the final forging temperature.

3. The alloy can be used for inert gas shielded tungsten arc welding and flash butt welding in the solid solution state.

Company Profile

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Our products sales all over the world as well. From the following two websites you can also get more information about our company:
http://xingda-alloy.en.made-in-china.com
http://xingda-alloy.en.made-in-china.com
 
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