. In practical application, steel resistant to weak corrosive medium is usually called stainless steel, while steel resistant to chemical medium is called acid-resistant steel. Because of the different chemical composition, the former is not necessarily resistant to the corrosion of chemical media, while the latter is generally stainless. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.
. The basic alloying elements of stainless steel are nickel, molybdenum, titanium, niobium, copper, nitrogen and so on. In order to meet the requirements of various uses for the microstructure and properties of stainless steel. Stainless steel is easily corroded by chloride ions, because chromium, nickel and chlorine are allophanates, which will exchange and assimilate to form corrosion of stainless steel.
The corrosion resistance of chemical composition stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steels is relatively low, with the maximum not exceeding 1.2%, and the Wc (carbon content) of some steels is even lower than 0.03% (for example, 00Cr 12). The main alloying element in stainless steel is Cr (chromium), and only when the Cr content reaches a certain value can the steel have corrosion resistance. Therefore, the Cr content of stainless steel is at least 10.5%. Stainless steel also contains elements such as nickel, titanium, manganese, nitrogen, niobium, molybdenum, silicon and copper. Stainless steel is not prone to corrosion, pitting, rust or wear. Stainless steel is also one of the strongest building metal materials. Because stainless steel has good corrosion resistance, structural members can permanently protect the integrity of engineering design. Chromium-containing stainless steel also has both mechanical strength and high ductility, which is easy to manufacture and meets the needs of architects and structural designers.
Question 2: Is stainless steel a metal material? Thank you. Yes
Stainless steel belongs to metallic materials and ferrous materials (although the actual color is not black).
Question 3: Is stainless steel a metal material? It is a metal material, but it is a mixture of several metal materials.
Question 4: Is stainless steel a metal product? Stainless steel is a metal product, specifically an alloy.
The main components are metallic iron (the main component of steel), metallic chromium (the main additive to prevent steel from rusting), carbon (to enhance the strength and toughness of steel) and other metals.
Question 5: Is stainless steel a metal? Stainless steel belongs to alloy, and metal material is not metal, because metal belongs to simple substance and stainless steel belongs to mixture.
Question 6: Is stainless steel a non-ferrous metal? Two completely different concepts. Stainless steel is alloy steel, and non-ferrous metal refers to ferrous metal and other concepts.
Question 7: Whether stainless steel belongs to ferromagnetic metal material, whether stainless steel is magnetic (only refers to being attracted by magnets) depends on the' structure' of steel, and austenitic stainless steel has no machinability; Martensite and ferritic stainless steels are magnetic; Another duplex stainless steel is weakly magnetic.
(Note:' Microstructure' is determined by chemical composition and also related to heat treatment state. See the books on metal materials science for details. )
Question 8: Stainless steel, copper and carbon are not metal materials. Why? Metallic materials refer to metallic elements or materials with metallic characteristics with metallic elements as the main components. Include pure metals, alloy, intermetallic compounds of metallic materials and special metallic materials. Carbon is a nonmetallic element, not a metallic material.
Question 9: Is stainless steel a heavy metal? Stainless steel is an alloy, a metal material, not a metal, because metal belongs to a simple substance and stainless steel belongs to a mixture.