At present, stainless steel sinks are almost every household, indispensable kitchen utensils, but do you understand the main metal elements of stainless steel products and their functions? In fact, most people don't know much about this, so the editor will make a short introduction and popularization for you today, I hope you can have a deeper understanding of other stainless steel products such as stainless steel sinks after reading.
First, the main metal elements contained in the stainless steel sink
In daily life, we are most exposed to 201, 304 stainless steel products, mainly containing nickel (Ni), chromium (Cr) two metal elements. Among them, 304 stainless steel grade: 0CR18NI9, of which the chromium content is 18%-19%, nickel content is 8%-9%; 201 stainless steel grade: 1Cr17Mn6Ni5N, of which the chromium content is 12%-13%, and the nickel content is 1%-1.5%. Basically, the nickel content determines the price of stainless steel sinks.
Second, the role of metal elements in stainless steel sinks
The main role of nickel in stainless steel products is that it changes the crystal structure of steel, so that the crystal structure changes from a body-centered three-dimensional (BCC) structure to a face-centered three-dimensional (FCC) structure, which can significantly improve the plasticity and toughness of stainless steel, and make the ductility of stainless steel raw materials better.
The fundamental reason why chromium has become the main element determining the performance of stainless steel is that after adding more than 12% of chromium to steel, a very thin colorless, transparent and very smooth oxide film (that is, passivation film) will be formed on the surface of steel, and the formation of this film greatly slows down the oxidation of steel and makes stainless steel products have better rust resistance.