Hastelloy C276: Pioneer in corrosion resistance in the industrial field
Nickel-based alloys are widely used as superalloys around the world and are known for their strength, ductility and corrosion resistance. Even under high temperature conditions, these alloys maintain strong performance. Today, we will take a deep look at a nickel-based alloy called Hastelloy C276, which is a superalloy composed of nickel, molybdenum and chromium and is considered to be the most versatile corrosion-resistant alloy currently available.
Characteristics and Applications of Hastelloy C276
What is Hastelloy C276?
Hastelloy C276 is a superalloy composed of nickel, molybdenum and chromium. According to the information, this alloy is resistant to the formation of grain boundary precipitates in the heat-affected zone of welding, so it is suitable for most chemical process applications under welding conditions. Hastelloy C276 has excellent resistance to pitting, stress corrosion cracking, and oxidizing atmospheres up to 1900°F, and can cope with a variety of chemical environments.
Application fields of Hastelloy C276
The application of Hastelloy C276 is very extensive, mainly involving the following fields:
Papermaking industry: used for digesters and bleaching equipment in the papermaking industry.
Oil and gas industry: used for components exposed to acidic gases.
Flue gas desulfurization equipment: as a material for flue gas desulfurization equipment.
Sulfuric acid reactor: used to manufacture sulfuric acid reactor.
Organic chloride process equipment: used for organic chloride process equipment.
Halide or acid catalyst process equipment: used for halide or acid catalyst process equipment.
Hastelloy C276 is widely used in chemical and petrochemical organic chloride processes, including scrubbers, pipes and stack linings for flue gas desulfurization. Its corrosion resistance is excellent in a variety of chemical processes, including the treatment of ferric chloride and cupric chloride, high temperature and contaminated mineral acids, solvents, dry chlorine, formic acid and acetic acid, acetic anhydride and seawater.
Chemical composition of Hastelloy C276
Hastelloy C276 contains elements such as molybdenum, chromium, iron, tungsten, cobalt and carbon, among which nickel is the main component. Its detailed chemical composition is as follows:
Element Maximum percentage
Molybdenum 17%
Chromium 16.5%
Iron 7%
Tungsten 4.50%
Cobalt 2.50%
Carbon 0.02%
Silicon 0.08%
Manganese 1%
Vanadium 0.35%
Phosphorus 0.03%
Sulfur 0.03%
Nickel Balance
Corrosion resistance of Hastelloy C276
Hastelloy C276 has excellent corrosion resistance to solutions containing phosphoric acid, and also performs well in seawater corrosion, and can maintain good corrosion resistance even in crevice conditions. Its chemical composition makes it highly resistant to sulfuric acid and hydrochloric acid, and is suitable for a variety of equipment, including scrubbers, pipelines, stack linings, stack gas reheaters and fans.
Hastelloy C276 Welding Properties
Hastelloy C276, also known as UNS N10276, is known for its good welding properties. This alloy can be welded by common welding methods, and with proper welding techniques, high-quality welds can be produced using conventional welding processes.
