1. High mechanical strength and strong anti-extrusion ability

Stainless steel has extremely high strength and rigidity, and the gasket will not be crushed, sheared or deformed when subjected to high preload or continuous pressure. This makes it very suitable for use in high-pressure vessels, flange seals or equipment with large vibration conditions to ensure long-term stable sealing.

2. Excellent high temperature resistance

Different grades of stainless steel (such as 304, 316, 321, 310S, etc.) have different temperature resistance capabilities, generally can withstand high temperatures above 500℃, and some high-nickel stainless steel can even maintain structural stability under 800~1000℃ conditions, which is very suitable for sealing high-temperature media such as steam, hot oil, and gas.

3. Strong corrosion resistance

Stainless steel itself has a natural resistance to a variety of corrosive media (such as water, steam, weak acids, weak alkalis, organic solvents, etc.), especially molybdenum-containing stainless steels such as 316 and 316L, which have stronger corrosion resistance to media such as chlorides. Therefore, stainless steel gaskets are widely used in chemical, seawater treatment, petrochemical and other industries.

4. Aging resistance and long life

Stainless steel will not age, harden or crack over time like non-metallic materials such as rubber and graphite. Even if used in harsh environments for many years, it can maintain good sealing performance and is suitable for sealing maintenance of long-term operating equipment.

5. Suitable for composite structures or coating applications

Although stainless steel gaskets themselves have poor flexibility, they can be composited with flexible materials (such as graphite, PTFE, non-asbestos) to form more efficient sealing gaskets, such as metal-coated gaskets, spiral wound gaskets, etc. This type of composite gasket has both rigidity and flexibility, better sealing performance, and a wider range of applications.

6. Good thermal and electrical conductivity

As a metal material, stainless steel has good thermal conductivity and electrical conductivity, and is suitable for certain connection parts that require heat dissipation or grounding and conduction.

7. Easy to process and stable in size

Stainless steel gaskets can be precisely processed into various shapes (round, square, special-shaped), and have strong dimensional stability at high temperatures, which can meet the needs of precise matching of flange sealing surfaces.

Summary:

Stainless steel gaskets are suitable for sealing conditions that require high temperature, high pressure, high strength, corrosion resistance, and long life. They are one of the important metal sealing components in industrial equipment, especially suitable for static sealing, precision flange surfaces, and harsh media environments. They are widely used in petrochemical, electric power, metallurgy, nuclear industry, shipbuilding, pharmaceuticals, and heat exchange systems.