Stainless steel material introduction:

Stainless steel is a kind of material with a brightness close to that of a mirror. It is hard and cold to the touch. It is a relatively avant-garde decorative material and has a series of characteristics such as excellent corrosion resistance, formability, compatibility and strength. It is used in heavy industry and light industry. , daily necessities industry and building decoration and other industries. Stainless acid-resistant steel is referred to as stainless steel. It is composed of two parts: stainless steel and acid-resistant steel. In short, steel that can resist atmospheric corrosion is called stainless steel, while steel that can resist chemical medium corrosion is called acid-resistant steel. Generally speaking, steel with a chromium content of more than 12% has the characteristics of stainless steel. Stainless steel can be divided into five categories according to its microstructure after heat treatment: ferritic stainless steel, martensitic stainless steel, austenitic stainless steel, Austenitic-ferritic duplex stainless steel and precipitation hardening stainless steel.

The history of stainless steel
Stainless steel is a kind of synthetic steel mainly composed of iron. It has excellent corrosion resistance and is not easy to rust. In the early 1820s, the British scientist Faraday invented the invention, which was the first step in the birth of stainless steel. This is a synthetic steel that adds a few percent of chromium to iron to improve its corrosion resistance and prevent it from rusting. However, the practical application of stainless steel took decades to come, and after various studies and improvements by many scientists, today's stainless steel was formed. What is stainless steel
Stainless steel is a synthetic steel composed of iron as the main component and then adding basic components such as chromium or tweezers. There are many types of stainless steel, basically synthetic steel containing 13% or 18% chromium, and synthetic steel containing 18% chromium and 8% nickel, which are generally called 13 chromium series, 18 chromium series, and 18-8 series. Stainless steel. Based on this, the content of chromium or nickel is then increased, and molybdenum, copper, titanium, etc. are added to enhance corrosion resistance, thus producing many types of stainless steel.

In terms of material properties, the biggest difference between stainless steel and iron is that stainless steel has excellent corrosion resistance, that is, it is not easy to rust, and the reason for this is that it contains components such as chromium and nickel. Because the chromium element combines with oxygen in the air to strengthen the gold-plated surface and form a dense non-oxidized film (called oxide scale). This film not only prevents oxidation, but also protects the surface from various corrosions, while nickel-molybdenum improves and strengthens this non-oxidation film. Therefore, the corrosion resistance of stainless steel, that is, the degree of rust resistance, is generally determined by the amount of chromium, nickel, molybdenum, etc. contained.