Ferritic Stainless Steel

They are low carbon stainless steels containing 10.5% -18% chromium.

They are magnetic .

Increasing the amount of chromium increases the corrosion resistance.

It is more difficult than austenitic steels in terms of forming.

Usuage Area :

Decorative, kitchen equipment, exhaust parts, automotive industry etc.

Martensitic Stainless Steel

Martensetic steels containing less than 16% chromium are magnetic.

Their ability to be welded is low.

They contain around 0.3% carbon.

They can be hardened by heat treatment with a high amount of carbon.
Usuage Area :

Surgical instruments, blades, pins, shafts etc.

Austenitic Stainless Steel

The most important feature of osnetitic stainless steel is that it is not magnetic. Its basic composition is 18% chromium and 8% nickel. It is the most preferred steel in terms of its mechanical properties, forming and corrosion resistance properties. They constitute 70% of the total stainless steel production.

304 and 316 are the most commonly used ones. It is easy to clean and maintain. It is hygienic.

Usuage Area :

Machinery and manufacturing industry, Elevator industry, Food industry, Kitchen equipment, Textile, Chemistry, Decorative application, Automotive industry, Petrochemical etc.

Ferritic-Austenitic (Duplex) Stainless Steel

Generally, these steels, which contain equal proportions of ferrite and austenite in their structures, differ in corrosion performance according to the alloys they contain.

Duplex stainless steels have a higher strength compared to other austenitic stainless steels, but they have a better resistance to localized corrosion than austenitics, especially against nucleation, crevice and stress corrosion.

Duplex stainless steels contain a high percentage of chromium, between 18% and 28%, and nickel between 4.5% and 8%.

They are more resistant than austenitics thanks to their lower nickel content than molybdenum and austenitics, which are up to a maximum of 5%.

The weakest feature of duplex stainless steels is that they break at high temperatures and very low temperatures. Especially if it is worked above 300 ° C and below -50 ° C even for a short time, duplex steels become brittle and the need for re-annealing arises.

The most widely known duplex stainless steel grade is 2205 grade.

Usuage Area :

Chemical industry, boat shafts, private hydroelectric power plants, propeller construction, pump shafts.

Alloys Applicable to Precipitation Hardening

Their main internal structures can be austenitic, flat austenitic or mertenitic.

Alloying is made with aluminum, titanium, niobium and copper elements to ensure precipitation formation.

Steels that can be applied precipitation hardening show good ductility and toughness, as well as moderate to good corrosion resistance.

They are magnetic, show high mechanical strength, their corrosion resistance varies from medium to good.