The difference and application of martensitic and austenitic stainless steel

Martensitic stainless steel has good corrosion resistance and high thermal conductivity. At present, it is mainly used in building decoration, home appliance parts, and high temperature resistant parts.

Martensitic stainless steel is magnetic, and austenitic stainless steel is weakly magnetic. When purchasing stainless steel products, you can use magnets to determine whether it is made of austenitic or martensitic stainless steel.

Stainless steel products for food are divided into two categories according to their uses. 1. Tableware containers are stainless steel utensils used to hold food, that is, pots, bowls, basins, etc. 2. Stainless steel tableware is a tableware such as knives, forks, spoons, chopsticks, etc. that directly contact food.

Martensitic stainless steel is not food grade stainless steel, it can only be used to make knives (wear-resistant, hard). Austenitic stainless steel can be used to make tableware, (austenite has good corrosion resistance).

What is the difference between martensitic stainless steel and austenitic stainless steel?

1. Corrosion resistance

Martensitic stainless steel contains 16.00-18.00% chromium and basically does not contain nickel. Austenitic stainless steel contains chromium and nickel. Austenitic stainless steel has good corrosion resistance.

2. Stable performance

Martensitic stainless steel is a ferrite form, austenitic stainless steel is austenitic form, and austenitic stainless steel is stable.

3. Resilience

Austenitic stainless steel has strong toughness, which is stronger than martensitic stainless steel.

4. Thermal conductivity

The ferrite of martensitic stainless steel has better thermal conductivity than the austenite of austenitic stainless steel.

5. Mechanical properties

Martensitic stainless steel is added with stable chemical element titanium, and the mechanical properties of the weld are better than austenitic stainless steel.

Martensitic stainless steel and austenitic stainless steel application areas

Martensitic stainless steel application areas:

1. Mainly used for building decoration, fuel burner parts, household appliances, and home appliance parts.

2. Add Ti or Nb to martensitic stainless steel to reduce the C content to 430LX, which improves the processing performance and welding performance. It is mainly used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, Bicycle flywheel, etc.

Application areas of austenitic stainless steel:

1. Austenitic stainless steel has the characteristics of high temperature resistance, good processing performance and high toughness. It is widely used in industry and furniture decoration industry and food and medical industry.

2. Austenitic stainless steel has strong corrosion resistance and is widely used in the production of equipment and parts that require good comprehensive performance (corrosion resistance and formability).