Characteristics of Nickel and Nickel Alloys
Most often, nickel is used not as a separate metal but as an alloy with other metals. The most common are alloys with titanium, aluminum, molybdenum, copper and chromium as additional elements. Nickel alloys are divided into acid-resistant alloys and temperature-resistant alloys. In this article, I will discuss alloys of these metals in detail and their impact on the properties of the final product.
Acid resistant
This group of nickel alloys includes alloys of copper, chromium, tungsten and molybdenum. These alloys are resistant to aggressive oxidizing and non-oxidizing environments.
Nickel and Copper
Copper-nickel alloy (Monel) has increased corrosion resistance, high tensile strength parameters and excellent ductility under different temperature conditions. Therefore, it is frequently used in the fields of electrical engineering, the chemical industry, and in the manufacture of naval ship equipment. This alloy is also used in the construction of nuclear reactors. One of the most common alloys is Monel 400.
Nickel vs. Chromium and Iron
Inconel is an alloy containing chromium and iron as alloying substances. The resulting metal is used to make components that operate at high temperatures. However, it is not recommended for use on parts exposed to temperatures above 850°C.
Nickel and Molybdenum
The alloy is made of nickel, iron and molybdenum and is used for casting mechanical elements exposed to hydrochloric acid and temperatures up to 70°C. The metal is resistant to corrosion. These include the brand ХН65МВ and its analog - Hastelloy C276.
Nickel and different metals
Nickel alloy is an alloy whose main components are nickel, chromium, iron, molybdenum, copper and titanium. It can be used to make containers for storing caustic soda solutions as well as sulfuric acid and phosphoric acid.
heat resistant
Adding elements such as titanium, aluminum, molybdenum, tungsten, niobium, rhenium, ruthenium and strontium to the nickel solution can increase its heat resistance. The alloy offers long-term strength, excellent manufacturability and high temperature resistance. The properties of an alloy depend on the percentage of a certain metal in the composition.
For example, Inconel 600 alloy is used to make gas turbine parts. They can withstand temperatures up to 750°C and are highly resistant to oxidation and metal fatigue. Inconel 718 is suitable for the manufacture of rotor blades for gas turbine engines with operating temperatures of 800-850°C. After heat treatment, the alloy is not sensitive to notching.
