Although nickel based alloy has good corrosion resistance and good mechanical and physical properties, because of its high nickel content and expensive price, it limited the range of applications of nickel alloy. Reducing the Ni content of nickel based alloy is a development direction of this alloy.

Compared with other series, Ni-Fe series nickel based alloy has the advantages of increasing Fe content, which can reach up to 45% and Ni content is reduced, so it has some advantages in cost. These alloys usually contain elements such as Cr, Mo, Cu, Ti and Al, and the average Cr content is still higher than 20%. According to the three element system, the alloy belongs to the Ni-Fe-Cr system. This kind of alloy is used to fill out the market demand of heat resistance, corrosion resistant alloy with low content. Its business series mainly has Incoloy series, and the typical brands are Incoloy800 825 864 and 925.

Incoloy800(Ni:30.0～35.0;Cr:19.0～23.0;Fe:≥39.5;C:≤0.10;Al:0.15～0.60;Ti:0.15～0.60;Al+Ti:0.30～1.20) is a single-phase austenitic alloy. It has been widely used because of its high temperature strength and oxidation resistance, anti carburizing and other forms of high temperature corrosion resistance. Typical applications include heat treatment equipment in the basket, tray and fixture for chloride ion should be heat exchanger and other piping systems for stress corrosion ability of the chemical and petrochemical process, steam generator tube in nuclear power plant, the shell of household appliances, electric heating element, heating cooking solution in pulp production, petroleum industry the heat exchanger.

Incoloy 825 is solid solution strengthening alloy that adds Mo, Cu and Ti Ni-Fe-Cr. In the oxidizing and reducing medium, it has excellent resistance to chloride stress corrosion cracking, pitting corrosion, crevice corrosion, handling and storage such as sulfuric acid and phosphoric acid as reductive acid, it can also be used in nitric acid solution, the nitrite oxidizing medium, but also it has excellent resistance to seawater corrosion resistance. The typical application is heating sulfuric acid pickling pipe, container, water cooling heat exchanger, marine products pipeline system, heat exchanger, the production of phosphoric acid washing and immersion tube evaporator, air heat exchanger in oil refining, and anaerobic application of flame retardant alloy.
Incoloy 864 alloy is a high performance and cost-effective Ni-Fe-Cr alloy specially developed for automotive exhaust system connections, exhaust gas recirculation manifolds, manifolds and exhaust pipes. It has excellent fatigue resistance, thermal stability and thermal salt corrosion resistance, pitting corrosion and mechanical stress corrosion cracking ability.

Incoloy 925 alloy is a kind of Ni-Fe-Cr series age hardening alloy with Mo, Cu, Ti and Al. The optimization of Ni Cr, Mo alloy, Cu in alloy makes it not only has good mechanical properties, corrosion resistance and has widely, including resistance to chloride stress corrosion, stress corrosion, H2S containing acid oil and gas environment corrosion, as well as in various reduction has good corrosion resistance and oxidation resistance. The alloy is widely used in aviation, ship, energy and other industries. It is often used in the production of oil and gas drilling equipment parts, such as pipes, valves, positioning joints, drilling tools, joints, packers, but also for the manufacture of certain fasteners.