1. Austenitic Stainless Steels (300 Series): This type of stainless steel is often represented by grades like 304 (EN 1.4301) and 316 (EN 1.4401). They have high corrosion resistance and excellent mechanical properties. They are used in many applications, including the food industry, chemical industry, and medical field.

2. Ferritic Stainless Steels (400 Series): These steels contain a high amount of chromium and have good corrosion resistance. They are commonly used in kitchen utensils, automotive exhaust systems, and interior designs.

3. Martensitic Stainless Steels (400 Series): These steels have high hardness and strength properties. They are used in applications like cutting tools, knives, and industrial equipment.

4. Duplex Stainless Steels: Duplex stainless steels contain both austenitic and ferritic structures and offer high strength and corrosion resistance. They are used in the maritime, petrochemical, and water treatment industries.

5. Precipitation Hardening (PH) Stainless Steels: These steels are used in applications where high-temperature resistance is required, such as components in the aviation industry.

6. High-Temperature Stainless Steels: Designed to provide strength and corrosion resistance at high temperatures, these steels are commonly used in industries like energy production, petrochemicals, and steel manufacturing. 

Each type of stainless steel is designed to meet specific application requirements. The choice of the right stainless steel type can vary depending on factors such as operating conditions, cost, corrosion resistance, and mechanical properties.