Overview

 

Nimonic 80A is a nickel-based superalloy composed of nickel-chromium, also known as age-strengthened alloy. This alloy has good creep resistance, corrosion resistance, oxidation resistance and fracture toughness at high temperatures (650-850℃). Therefore, Nimonic 80A is widely used in aerospace, Marine, thermal and nuclear power and transportation, especially in the manufacture of key components that need to withstand high temperatures, such as aero-engine low-pressure turbine blades, bearing rings, bolts and bushings, Marine engine valves, gas turbine blades, etc.

The composition and process of Nimonic 80A have an important influence on its performance. Among them, Cr, Ti, Al and other alloying elements play a very important strengthening role in Nimonic 80A. Cr element mainly plays the role of solid solution strengthening, and can form a dense oxide layer, improve the corrosion resistance and oxidation resistance of the alloy. Al and Ti are the main elements to form γ' strengthening phase, and their content and Ti/Al ratio have important effects on the high temperature properties of the alloy.

In terms of production process, the production of Nimonic 80A alloys usually includes vacuum induction melting, forging, hot rolling, solution aging and other steps. Vacuum induction melting can strictly control the content of active elements in the alloy to ensure the stability of alloy properties and quality.

Limiting Chemical Composition, %

Nickel......................................................................................................................................................................................Balance.

Manganese...........................................................................................................................................................................1.00 max.

Si............................................................................................................................................................................................1.00 max.

Carbon ..................................................................................................................................................................................0.10 max.

Copper...................................................................................................................................................................................0.20 max.

Iron.........................................................................................................................................................................................3.00 max.

Chromium..........................................................................................................................................................................18.00-21.00

Titanium.................................................................................................................................................................................1.80-2.70

Aluminum...............................................................................................................................................................................1.00-1.80

Cobalt.....................................................................................................................................................................................2.00 max.

Boron....................................................................................................................................................................................0.008 max.

Sulfur.....................................................................................................................................................................................0.015 max.

Lead....................................................................................................................................................................................0.0025 max.

Ziconlum.................................................................................................................................................................................0.15 max.

Physical Constants

Below are some physical constants and thermal properties of

Mechanical properties

Corrosion Resistance

Nimonic 80A is a superalloy with excellent corrosion resistance due to its special composition and process. This alloy can be used in a variety of corrosive environments, such as acidic, alkaline and saline environments. The corrosion resistance of Nimonic80A alloy is not only due to the inherent properties of its metal elements, but also due to its special manufacturing process. In the manufacturing process, this alloy has undergone complex heat treatment and work hardening, making its internal structure more dense, so as to effectively resist the erosion of various chemical corrosive substances.

Nimonic 80A's surface can form a dense oxide film, which can effectively prevent corrosive media from invading the inside of the material, thereby protecting the material from corrosion. This alloy has excellent corrosion resistance in oxidizing atmospheres, including heating and cooling conditions. This protection is mainly due to the chromium oxide film formed on the surface of the alloy, which is also resistant at high temperatures.

The high temperature strength and corrosion resistance of Nimonic 80A can guarantee the long-term stable operation of the equipment and extend the service life of the equipment, which makes it widely used in many fields. For example, it can be used to manufacture furnace tubes for high-temperature furnaces, parts for petrochemical equipment, parts for nuclear reactors, etc. In the aerospace sector, Nimonic 80A alloys are used in the manufacture of engine exhaust valves and spindles, fasteners and transmissions that are subject to high temperatures and corrosion.

Heat Treatment

The heat treatment of Nimonic 80A mainly consists of two steps: intermediate vacuum annealing and final heat treatment.

The intermediate vacuum annealing is carried out after each forming and needs to be carried out at a temperature of 1060 ° C ±10 ° C for a duration of 10 minutes and is cooled using an argon fan. This step can effectively eliminate the stress inside the material, improve the plasticity and toughness of the material, so as to ensure the forming quality of the parts.

The final heat treatment is aged in a vacuum furnace and needs to be carried out at a temperature of 750 ° C ±10 ° C for a duration of 4 hours and cooled using an argon fan. This step can make the structure of the material more uniform, improve the strength and hardness of the material, so as to ensure the service life and reliability of the parts.

 

Available  Forms

We provide you with a variety of product forms, including but not limited to.

● Bars & Rods

● Strips & Tape

● Wire & Welding

● Pipe & Tube

● Sheet & Foils

● Flanges & Forgins