Let me introduce you to what we use to make our products for you.
NEREZ – corrosion-resistant (stainless) steel is a kind of steel whose main required property
is corrosion resistance. It is an alloy of chromium, nickel and iron that has a content of 10.5-30%
chromium, up to 30% nickel or 2.5% manganese. At the same time, they contain a certain amount of other
austenite-forming elements, e.g. carbon, manganese, nitrogen, copper.
Breakdown of corrosion resistant steels
There are many types of stainless steels that differ in their resistance to corrosion caused by certain
agents. According to chemical composition, corrosion resistant steels are divided into ferritic, martensitic,
austenitic, and austenitic-ferritic.
Ferritic
These steels are magnetic and sufficiently ductile. The higher chromium content increases their corrosion resistance,
which is higher than that of martensitic steels in oxidizing environments. Applications are in the chemical
industry, nitric acid environments, transportation, air conditioning, architecture. They are unsuitable in
welded structures.
Martensitic
The corrosion resistance is low and their resistance decreases with increasing temperature. Resistance to
atmospheric corrosion is only sufficient in very clean atmospheres.
Austenitic
They have the highest corrosion resistance of all the basic grades, which can be increased by adding
molybdenum and copper. The ductility and toughness are important properties.
Austenitic-ferritic (duplex)
They are derived from classic austenitic steels by increasing the chromium content and reducing the nickel content.
The steels then have some special properties. Welding is more difficult.
