What is the difference between Inconel and nickel alloy?
The answer to the question "What are nickel alloys and Inconel?" is an interesting one. This blog will explore both materials and their applications.
Let's start with nickel
Nickel is an extremely adaptable element that has a variety of beneficial properties, such as resistance to heat, corrosion, electromagnetic properties, and low expansion. It also bonds easily to a variety of different alloys.
Nickel's adaptability and natural properties make it a very useful metal, so it is used to make a wide variety of nickel alloys.
So, what are nickel alloys and Inconel?
"Nickel alloy" is a general term that refers to grades of metal that have a particularly high nickel content. Inconel is just one type of nickel alloy.
Change the chemical composition of the alloy and its benefits will change. Different benefits mean that different nickel alloys have different commercial uses.
These uses include:
– Aircraft gas turbines
– Steam turbine power plants
– Medical applications
– Nuclear power systems
– Chemical and petrochemical industries
Many of these applications require materials to be resistant to corrosion and heat, so nickel and nickel alloys are ideal choices.
Among the many nickel alloys: Inconel 625 alloy, which has a nickel content of at least 58%, and Inconel 825 alloy, which has a nickel content between 38-46%. Both products are known for their excellent performance in corrosive environments.
Gnee Steel is able to source any type of product such as round bars, flanges, and even seamless pipes made of Inconel 625 alloy and Inconel 825 alloy.
About Inconel
Inconel is a special class of austenitic nickel-chromium-based alloys known as "super alloys".
As mentioned earlier, one of the advantages of Inconel is its ability to be used in "extreme" environments. These "extreme" environments refer to extreme temperatures or extreme pressures. This is because when Inconel is subjected to extremely high temperatures, it forms a very stable oxide layer that protects the metal surface from further corrosion. This process is called "passivation", which is a very beneficial chemical reaction, and it actually means that Inconel builds its own "barrier" to resist future damage.
This passivation process also allows Inconel to maintain its strength over a wide temperature range. Other metals, such as aluminum, may not be able to withstand such temperatures.
Applications of Inconel
The significant advantages of Inconel have led to its widespread use in a variety of different markets and industries, such as:
– Marine
– Aerospace
– Nuclear
– Chemical Processing
– Oil and Gas
– Automotive
The range of applications for Inconel is very wide, and it is often used in high-performance equipment that needs to be reliable even in harsh environments. For example, in the oil and gas industry, it is often seen in chemical processing and pressure vessels, well pump motor shafts, steam generators, and even turbine blades, seals, and combustion chambers.
Speaking of highly sensitive applications, Inconel can even be found as a core component in nuclear pressurized water reactors.
Today, Inconel is also very common in the automotive industry. It is used in the exhaust systems of Formula 1 and NASCAR cars, as well as in the turbocharger systems of newer cars and motorcycles, where exhaust temperatures can exceed 1,000°C.
Nickel alloys and Inconel have been used in a wide range of high-pressure environments, from nuclear power to spectator sports. It is safe to say that it is a critical material grade and a wise choice for many engineers looking to create products that deliver high performance and reliability.
Let's focus on Inconel 625 alloy
Inconel 625 alloy was created in the 1960s to create a material that could be used in steam pipes. It has excellent resistance to high stresses and a wide temperature range. Its "passivation" properties mean that it protects itself from corrosion and oxidation in a variety of environments, such as water, air and even acidic environments.
Since its initial development, Inconel 625 alloy has undergone several improvements that have significantly improved its weldability and "creep resistance" properties. "Creep resistance" refers to the slow but permanent movement or deformation of a solid material under sustained mechanical stress.
These improvements have enabled Inconel alloys to be used in a wider range of applications, such as in the chemical processing industry, as well as in the manufacture of pumps, valves and other high-pressure equipment in the marine and nuclear industries.
Some of the products and technical applications for Inconel 625 include:
– Seawater components
– Flare stacks
– Aircraft piping systems
– Specialized seawater equipment
– Chemical process equipment
– Turbine shrouds
– Engine thrust reversers
– Jet engine exhaust systems
