The application ranges of Inconel 625 alloy and Incoloy 825 alloy are very close. Since the Incoloy series alloys are developed to reduce the cost of superalloys, the Incoloy 825 alloy can be regarded as a fully weakened version of the Inconel 625 alloy.
In this article, we analyze the differences in properties of the two alloys from many aspects.
Basic Information
Inconel 625 alloy is based on nickel, with 21-23% chromium, 8-10% molybdenum and 3.15-4.15% niobium added. It is a typical solid solution strengthened alloy with excellent mechanical properties, corrosion resistance and welding performance, and its operating temperature range is from low temperature to 982°C.
Incoloy 825 alloy is based on nickel, with 30-35% iron, 20-23% chromium, 2-3% molybdenum and 0.5-1.5% copper added. The alloy’s chemical composition is designed to provide excellent corrosion resistance against many corrosive environments.
From a composition comparison, Inconel 625 alloy is more stringent in controlling impurity elements, such as lower sulfur and manganese contents, which makes Inconel 625 alloy have better instant performance and durability. The 825 alloy contains higher iron, which reduces the cost of the alloy and also reduces the corrosion resistance. Alloy 625 has a high nickel content and a higher molybdenum content giving it a better foundation to resist corrosion.
In terms of mechanical properties, Inconel 625 alloy adds niobium and tantalum. The solid solution strengthening effect of these two elements is stronger than other elements, giving Inconel 625 alloy higher mechanical strength. At the same time, Inconel 625 alloy contains higher molybdenum and also has better strengthening effect. The table below compares the mechanical properties of the two alloy materials.
In terms of physical properties, the Inconel 625 alloy has a higher density and a wider melting point range, which allows the Inconel 625 alloy to maintain better performance at high temperatures.
Since Incoloy 825 alloy is designed as a cheaper alternative to Inconel 625 alloy, the application range of the two alloys is basically the same, but the service temperature of Incoloy 825 alloy is lower. The products we provide are basically the same, mainly including seamless steel pipes, welded pipes, flanges, elbows, T-shaped pipes, etc.
Although the performance of Incoloy 825 alloy is not as good as that of Inconel 625 alloy, it is cheaper. Therefore, when selecting materials, if the performance of Incoloy 825 alloy is sufficient, it is recommended to choose Incoloy 825 alloy to reduce costs.
In short, Incoloy 825 alloy is a fully weakened version of Inconel 625 alloy. (purity, corrosion resistance and mechanical properties), but the price of Incoloy 825 alloy is relatively cheaper and can be given priority.
Tianjin Anton Metal Manufacture Co., Ltd. is a company specializing in the production of various nickel-based alloys, Hastelloy alloys and high-temperature alloy materials. The company was established in 1989 with a registered capital of 10.0 million, specializing in the production and sales of alloy materials. Anton Metal’s products are widely used in aerospace, chemical industry, electric power, automobile, nuclear energy and other fields, and can also provide customized alloy material solutions according to customer needs. If you need to know the price consultation of alloy materials or provide customized alloy material solutions, please feel free to contact the sales staff.
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Post time: Dec-13-2023
