A Man Made a Smart Chair with Stainless Steel Slab

Steel is an alloy made of iron and carbon as well as other elements; These elements create a unique resistance in it.

Since the beginning of the 20th century, hundreds of types of steel have been developed, each of which has its own unique characteristics.

To help organize these steels, the American Iron and Steel Institute (AISI) and the Society of Automotive Engineers (SAE) have specified specific types of steels.

In this article, a group of steels from the stainless steel slab family that is, steels that are more resistant to stains, corrosion and rust is discussed.


This category of stainless steel is known as 440 steel.

Thanks to their hardness and wear resistance, they are considered a very popular material.

The application of stainless steel 440 can be seen in various industries.

In this article, the features, characteristics and application of steel 440 will be examined.

The purpose of this work is that the audience can learn the uses and how to use this metal.

Physical characteristics of 440 stainless steel: 440 stainless steel is a part of stainless steels or alloy steels that contain at least 10% chromium.

This amount of chromium makes these alloys very resistant to corrosion.

AISI has developed a three digit nomenclature for stainless steels (as opposed to the usual four digit names given to non stainless steels), where the first digit indicates the type of steel and the alloying elements.

Stainless steels are also classified based on their molecular structure.

Based on this, stainless steels can be divided into austenitic, ferritic, martensitic or duplex types.

The difference between these four types lies in their crystal lattice structures, which give stainless steels useful properties such as greater hardness, malleability or fracture resistance.

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