Stainless steel- A few things to know

The term stainless steel is said to have originally been used to describe a cooking knife made from new metal. Currently, it refers to rust-resistant steel. It is also sometimes written as Kuji in stainless steel.

Definition of stainless steel

The main component of stainless steel is iron, which contains 12% or more of chromium (Cr). It has been improved to prevent the easily rusting weakness of iron and has corrosion resistance/durability, designability, fire resistance/low temperature.

Alloy steel has characteristics and workability that are superior to those of carbon steel and is easy to maintain.
Some Inconel 625 Plate contains nickel (Ni) to form a stronger oxide film.

It is also important that carbon (C) content is low.

Since carbon has a property of easily binding to oxygen, no matter how much chrome is contained, if it has a large amount of carbon, it easily rusts.

Stainless steel is strong against rust

It is said that stainless steel is generally resistant to rust. When chromium is added to iron, chromium combines with oxygen to form a thin protective film on the surface of the steel. It prevents the progress of rust.

This film is thin, about three-millionths of a millimetre, but it is very strong. Even if it breaks, Monel 400 Plate will automatically regenerate as soon as there is oxygen around it to prevent rust.

What kind of stainless steel is famous for sinks?

There are 18-8 stainless steel (sus304) and 18 chrome stainless steel commonly used for sinks.
18-8 stainless steel (sus304) contains 8% nickel in addition to 18% chromium.
For this reason, the rust is very strong, but it is not completely rust-free.

How can a stainless bottle keep warm?

Stainless steel mahobin is a vacuum double stainless steel bottle made to keep the temperature of hot and cold water inside for a long time.



The structure is wrapped with silver plating or copper foil on the wall (vacuum surface) of the stainless steel inner barrel. The air between the inner and outer barrel walls is extracted from the tip tube. It's a vacuum. A double vacuum bottle prevents convection and conduction of heat and foiling blocks radiant heat.

About 200 types of stainless steel

There are about 200 types of stainless steel, and their mechanical properties and corrosion resistance vary depending on the alloy element content and metal structure.

Features of austenitic stainless steel

Austenitic stainless steel represented by Hastelloy C276 Tube has a double-centred cubic lattice metal structure and has excellent flexibility and excellent workability. It has excellent weldability, corrosion resistance, and high-temperature strength. Its tensile strength at 600°C is about 3 to 5 times that of carbon steel, eight kg/m㎡, making it ideal for high-temperature machine parts. Since austenitic stainless steel is non-magnetic, it is also used in some electronic components, medical equipment, and special weapons.

Characteristics of duplex stainless steel

Cold rolling is extremely difficult for thick Duplex Steel Sheet

 plates due to the extremely large anisotropy of the metal structure. It is close to the ideal material that has both strength and flexibility as a characteristic of duplex stainless steel.

Features of ferritic stainless steel

Moulded parts generally used 2507 Sheet stainless steel has excellent resistance to corrosion cracking.