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What are the different types od stainless steel?

What are the different types od stainless steel?

What are the characteristics of austenitic, ferritic, martensitic and duplex steel?

03.09.2024

What is stainless steel?

Stainless steel is a group of iron-based alloys known for their corrosion resistance, durability, and versatility. The various types of stainless steel are classified based on their chemical composition, microstructure, and properties

 

 

Austenitic Stainless Steel  - High chromium (16-26%) and nickel (up to 35%)
 

Properties:
Excellent corrosion resistance

High ductility and toughness

Non-magnetic in the annealed condition but can become slightly magnetic after cold working

High formability and weldability

 

 

Ferritic Stainless Steel - High chromium (10.5-30%), little or no nickel

 

Properties:
Moderate corrosion resistance, especially against stress corrosion cracking

Magnetic
Good ductility and formability

Less expensive than austenitic steels

Cannot be hardened by heat treatment but can be strengthened by cold working.

The most widely used ferritic steel, commonly used in kitchen appliances

Often used in automotive exhaust systems.

 

Martensitic Stainless Steel - High chromium 
 

Properties:
Can be hardened by heat treatment

High strength and hardness.

Lower corrosion resistance than austenitic and ferritic steels

Magnetic.

Often used for surgical instruments, also called "cutlery-grade" steel.

 

Duplex Stainless Steel -  Balanced amounts of austenitic and ferritic structures, typically with 18-28% chromium, 4-7% nickel, and added molybdenum

 

Properties:
High strength compared to austenitic and ferritic steels

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INVEST-TECH Sp. z o.o. ul. Płaska 32-34, 87-100 Toruń, Poland - NIP 879-22-90-755 - REGON 871546227. Spółka z ograniczoną odpowiedzialnością zarejestrowana w Sądzie Rejonowym w Toruniu - KRS 0000005413. Kapitał zakładowy 1.000.000,00 Zarząd Spółki: Alicja Jezierska