Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers: an excellent choice for corrosion resistance and oxidation resistance

Hastelloy C22 (alloy C22) alloy fasteners - bolts, nuts, screws, washers, is a high-performance nickel-based alloy fasteners - bolts, nuts, screws, washers composed of nickel, chromium, molybdenum and tungsten. It is known for its excellent corrosion resistance and oxidation resistance, especially when dealing with strong acids and other corrosive media. Hastelloy C22 fasteners - bolts, nuts, screws, washers are widely used in industries such as chemical, oil and gas, food processing, pharmaceuticals, power and nuclear energy.

Chemical composition of Hastelloy C22 alloy:

Characteristics of Hastelloy C22 alloy

1. Corrosion resistance Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are one of the most corrosion-resistant alloy fasteners on the market, even better than C276 and C625 alloys. It has excellent resistance to almost all reducing and oxidizing environments, including strong oxidants, seawater and a variety of organic acids. In addition, it has good resistance to localized corrosion caused by chloride ions, which makes Hastelloy C22 alloy fasteners perform well when dealing with strong acids and other corrosive media.

2. Oxidation Resistance

Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers have excellent resistance to oxidation, carburization and sulfidation at high temperatures. However, it is not recommended to use C22 alloy fasteners at temperatures exceeding 1250°F (677°C) because brittle phases may form. This oxidation resistance makes Hastelloy C22 alloy fasteners widely used in high-temperature applications.

3. Mechanical Properties

Hastelloy C22 alloy is usually provided in the annealed state with the lowest yield strength. This alloy can be cold worked to increase the strength level. The melting point of C22 alloy is 1399°C (2550°F), which allows it to maintain good mechanical properties in high temperature environments.

4. Heat treatment

Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are usually annealed at 1121°C (2050°F) followed by rapid cooling. This heat treatment process helps maintain the corrosion resistance and mechanical properties of the alloy.

5. Machinability

Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers can be formed by cold working and hot working methods. Due to its rapid work hardening characteristics, multiple annealing treatments are required during cold working to ensure the performance and processing accuracy of the material. During hot working, the starting temperature of C22 alloy is recommended to be 1232°C (2250°F) and the ending temperature is recommended to be 954°C (1750°F).

Application fields of Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers

Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are widely used in many fields due to their excellent corrosion resistance and oxidation resistance:

Chemical processing: used to manufacture equipment that handles strong acids and other corrosive media, such as reactors, pipelines and storage tanks.

Oil and gas: In the process of oil and gas extraction and processing, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant pipes and equipment.

Food processing: In the food processing industry, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture equipment that comes into contact with food, such as pipes and storage tanks, and are favored for their corrosion resistance and non-toxicity.

Electricity generation: In the power industry, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture equipment that is resistant to high temperatures and corrosion, such as heat exchangers and boiler parts.

Pharmaceutical Industry: In the pharmaceutical industry, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant equipment such as reactors and pipes.

Pulp and Paper Industry: In the pulp and paper industry, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant equipment such as reactors and pipes.

Nuclear Fuel Regeneration: In the nuclear energy field, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant and high-temperature equipment such as reactor components and heat exchangers.

Pesticide Manufacturing: In the pesticide manufacturing process, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant equipment such as reactors and pipes.

Pickling System: In the pickling system, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to manufacture corrosion-resistant equipment such as pickling tanks and pipes.

Sulfur Dioxide Cooling Tower: In sulfur dioxide cooling towers, Hastelloy C22 alloy fasteners - bolts, nuts, screws, washers are used to make corrosion-resistant equipment such as cooling tower components and pipes.