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Specification of stainless steel
Specification of stainless steel
Stainless steel is the abbreviation of stainless steel, resistant to air, steam, water and other weak corrosive medium or stainless steel is called stainless steel; The corrosion resistant medium (acid, alkali, salt, etc.) corrosion of the steel is called acid-resistant steel. Then what are the specifications of this stainless steel?
Stainless steel refers to the resistance of air, steam, water and other weak corrosive medium and acid, alkali, salt and other chemical corrosive media steel, also known as stainless acid-resistant steel. In practical application, the steel resistant to weak corrosion medium is often called stainless steel, and the steel resistant to chemical corrosion medium is called acid-resistant steel. Due to the difference in chemical composition, the former may not be resistant to chemical medium corrosion, while the latter is generally rustless. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel. Stainless steel is usually divided into: martensite steel, ferrite steel, austenitic steel, austenitic - ferrite (dual phase) stainless steel and precipitation hardening stainless steel. In addition, according to the composition can be divided into: chromium stainless steel, chromium nickel
Stainless steel and chromium manganese nitrogen stainless steel and so on. Also used for pressure vessels of special stainless steel "GB24511_2009_ pressure equipment stainless steel plate and steel belt". The corrosion resistance of stainless steel decreases with the increase of carbon content, therefore, the carbon content of most stainless steel is lower, the maximum is not more than 1.2%, some of the steel's ohm c (carbon content) even less than 0.03% (such as 00Cr12). The main alloying element in stainless steel is Cr (chromium), only when Cr content reaches a certain value, steel has corrosion resistance. Therefore, the Cr (chromium) content of stainless steel is at least 10.5%. Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other elements. The model of stainless steel is as follows: gb1220-84 stainless steel bar (grade I) gb4241-84 stainless steel welded disc (grade H) gb4356-84 stainless steel welded disc (grade I) gb1270-80 stainless steel welded tube (grade I) gb3280-84 stainless steel hot plate (grade I) gb4237-84 stainless steel hot plate (grade I) gb4239-91 stainless steel cold belt (grade I)
Stainless steel sheet is a kind of inexpensive material, but the customer has a very high demand for its surface quality. Stainless sheet in the process of production inevitably appear all sorts of defects, such as scratches, pitting, sand hole, wiring, crease, pollution, etc., and its surface quality, like these defects such as scratch and crease is not allowed, senior material and pitting, sand hole defects in the spoon, spoon, fork, production is not allowed, because the polishing is very difficult to sell it. According to the degree and frequency of various surface defects, it is necessary to determine the quality grade of its table, and thus to determine the product grade. Above is the specification of stainless steel related content, thank you for reading!