Hastelloy

Hastelloy X is a Nickel-Chromium-Iron-Molybdenum alloy with an exceptional combination of oxidation resistance, ease of fabrication and high temperature strength. It has also been found to be exceptionally resistant to stress corrosion cracking in petrochemical applications. Hastelloy X possesses exceptional strength and oxidation resistance up to 1200°C (2200°F), and has exceptional forming and welding characteristics. Some applications that Hastelloy X is recommended for includes gas turbine engines, combustor cans, spray bars and flame holders. Hastelloy X is also known as Inconel HX, Nicrofer 4722 Co, and Pyromet 680.

This alloy was developed to broaden the application range of one alloy. With the addition of Copper to the Nickel-Chromium-Molybdenum system, Hastelloy C-2000 is resistant to an extensive range of corrosive chemicals, including sulphuric, hydrochloric and hydrofluoric acids. The combination of Molybdenum and Copper provide excellent corrosion resistance to reducing media, while the high Chromium content gives good oxidising resistance. Like other nickel alloys, Hastelloy C-2000 is ductile, easy to form and weld, while possessing excellent resistance to stress corrosion cracking in chloride-bearing solutions.

This Nickel-Molybdenum-Chromium alloy with the addition of Tungsten, has excellent corrosion resistance in a wide range of corrosive media and is especially resistant to pitting and crevice corrosion. Hastelloy C-276 is considered to be the most versatile corrosion resistant alloy available, as it is resistant to the formation of grain boundary precipitates in the weld heat-affected zone; this makes it ideal for most chemical process applications in an as welded condition. Hastelloy C-276 also has exceptional resistance to pitting, stress-corrosion cracking and oxidizing atmospheres, as well as excellent resistance to multiple different chemical environments. Hastelloy C-276 is also known as Nicrofer 5716, Superimphy 276, and Inconel C-276.

A Nickel-Chromium-Molybdenum alloy with better overall resistance and versatility than any other NiCrMo available. It has excellent resistance to localised corrosion and to a variety of mixed industrial chemicals. Hastelloy C-22 is used in severely corrosive media involving high chloride and temperature applications such as buffer solutions, active pharmaceutical ingredients (API), fabric softeners, cleaning supplies, and condiments such as soy and chili sauce. Like other nickel alloys, Hastelloy C-22 is extremely ductile, exhibits exceptional weldability, and can easily be fabricated into industrial components. Hastelloy C-22 is also known as Nicrofer 5621, Superimphy C22, and Inconel 622.

This Nickel-Chromium-Molybdenum alloy tolerates high temperatures and gives a design freedom in areas where weld geometry makes excessive heat build-up unavoidable. Resistance to general and localised corrosion and stress corrosion cracking is generally similar to Hastelloy C-276. With its high contents of Chromium and Molybdenum, Hastelloy C-4 is able to withstand both oxidizing and non-oxidizing acids, and is resistant to pitting and crevice attacks in the presence of chlorides and other halides. Like other nickel alloys, Hastelloy C-4 is ductile, easy to form and weld. Hastelloy C-4 is also known as Nicrofer 6616.

This Nickel-Molybdenum alloy gives excellent resistance to hydrochloric acid at all concentrations and temperatures from ambient to high. It also withstands sulphuric, acetic, formic and phosphoric acids and other non-oxidizing media. B-3 also has excellent resistance to pitting corrosion and to stress-corrosion cracking. Hastelloy B-3 is not recommended in the presence of ferric or cupric salts. Like other nickel alloys, Hastelloy B-3 is ductile and can be formed and welded. It resists stress corrosion cracking in chloride-bearing solutions, and is able to withstand fluoride-bearing media and concentrated sulfuric acid, both of which result in damage to zirconium alloys.