What kind of material is stainless steel (inox)?

Stainless steel (inox) is one of the most widely used materials across a broad range of industries, from construction and architecture to manufacturing and food processing. But what exactly is stainless steel, and what makes it so popular? In this article, we take a closer look at the material and explore its properties and applications.

Stainless steel is an alloy of iron, carbon and other elements, including chromium, nickel and molybdenum. The exact composition can vary depending on the application, but it usually contains at least 10% chromium. The chromium is what gives stainless steel its unique properties, including its resistance to corrosion and heat.

There are several types of stainless steel, each with its own properties and applications. Some of the most common are:

Austenitic stainless steel
This type is non-magnetic and contains high levels of chromium and nickel. It is highly corrosion-resistant and is often used where high standards of cleanliness and hygiene are required, such as in food processing and medical equipment.

Ferritic stainless steel
This type is magnetic and contains high levels of chromium but lower levels of nickel. It is also highly corrosion-resistant, though not as resistant as austenitic stainless steel. Ferritic stainless steel is often used in automotive applications such as exhaust systems.

Martensitic stainless steel
This type is magnetic and contains high levels of carbon and chromium but lower levels of nickel. It is very hard but not as corrosion-resistant as the other types. Martensitic stainless steel is often used where high strength and hardness are needed, such as knives and turbine blades.

Duplex stainless steel
This type combines austenitic and ferritic structures, giving it a unique combination of strength and corrosion resistance. It is often used in chemical processing and in the oil and gas industry.

Besides its unique properties, stainless steel is popular because it is relatively easy to work with and can be formed into a wide range of shapes and sizes. It is also easy to clean and maintain, making it a popular choice for applications that require high standards of hygiene and cleanliness.