Inconel alloy and Incoloy alloy are both nickel based alloys composed of alloying elements such as nickel, chromium, molybdenum, etc. They exhibit excellent performance at high temperatures and extreme environments. Although these two alloys are very similar, there are still some differences in their use. The following will provide a detailed introduction to the differences between Inconel alloy and Incoloy alloy.

Chemical composition

In terms of chemical composition, Inconel alloy contains more molybdenum, cobalt, iron and copper elements, while Incoloy alloy contains more iron, chromium, molybdenum and tungsten elements. Among them, Inconel 718 alloy is the most commonly used, and its chemical composition is as follows: nickel (50%-55%), chromium (17%-21%), titanium (4.75%-5.5%), niobium + tantalum (4.75%-5.5%), aluminum (0.2%-0.8%), molybdenum (2.8%-3.3%), cobalt (1.0%), etc. In comparison, the chemical composition of Incoloy 825 alloy is: nickel (38%-46%), chromium (19.5%-23.5%), iron (22% minimum), copper (1.5%-3%), vanadium (0.6%-1.2%), molybdenum (2.5%-3.5%), aluminum (0.2% maximum), etc.

Corrosion resistance

Inconel alloy has an advantage over Incoloy alloy in terms of corrosion resistance. Generally speaking, Inconel alloy performs well in harsh environments such as high temperature, strong acid, strong alkali and seawater. In contrast, Incoloy alloy is more suitable for oxidation and corrosion resistance applications at low to medium temperatures, such as in the chemical industry and oil refining industry.

Manufacturing cost

Inconel alloy has a higher manufacturing cost due to its high nickel content. Although Incoloy alloy also contains nickel, the relative content is lower, so the manufacturing cost is lower than that of Inconel alloy. This is also one of the reasons for choosing Incoloy alloy.

Physical properties

Inconel alloy is more plastic and ductile than Incoloy alloy in terms of physical properties, so it is more suitable for processing and forming. Incoloy alloy has a higher iron content and better magnetic permeability, so it is more commonly used in the electrical field.

Application range

Due to the differences in the characteristics and performance of the two alloys, their scope of practical application is also different. Inconel alloy is widely used in aerospace, automotive industry, petrochemical industry and other fields, while Incoloy alloy is mainly used in chemical industry, oil refining, pharmaceutical, food processing and other industries.

In summary, although both Inconel alloy and Incoloy alloy are high-performance alloy materials, they have certain differences in chemical composition, corrosion resistance, manufacturing cost, physical properties and application range. Choosing alloy materials that suit your actual needs can better guarantee the quality and performance of the product.