What is stainless steel

- Mar 01, 2019-

Stainless steel is a kind of high alloy steel which can resist corrosion in air or chemical corrosive medium, as the name suggests, it is not easy to rust, and has beautiful surface and corrosion resistance, without having to go through surface treatment such as plating, can play the inherent surface performance of stainless steel. But the market is really suitable for processing rings of stainless steel only SUS316L medical stainless steel, at least also need to use SUS304 materials! Now most products are made of stainless steel tubes, stainless steel plates or stainless steel wire!

With the magnet test can be with the magnet phase suction can only indicate that it is iron stainless steel refers to the resistance to air, steam, water and other weak corrosive media and acid, alkali, salt and other chemical etching media corrosion of steel, also known as rust-resistant steel. In practical applications, steel that is resistant to weak corrosive media is often referred to as stainless steel, while steel corrosion resistant to chemical media is called acid-resistant steel. Due to the difference in chemical composition between the two, the former is not necessarily resistant to chemical media corrosion, while the latter is generally non-rust. The corrosion resistance of stainless steel depends on the alloy elemets contained in the steel.

Stainless steel basic alloy elements also nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the various uses of stainless steel organization and performance requirements. The corrosion resistance of stainless steel decreases with the increase of carbon content, so the carbon content of most stainless steel is lower, and the wC (carbon content) of some steels is even less than 0.03% (such as 00Cr12). The main alloy element in stainless steel is Cr, which is corrosion-resistant only when the Cr content reaches a certain value. Therefore, stainless steel general wCr are more than 13%. Stainless steel also contains Ni, Ti, Mn, N, Nb and other elements.