Resentment and entanglement of stainless steel 200 lines and 300 lines
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Stainless steel: 200 lines and 300 lines of resentment and entanglement
We know so according to its organizational structure can be divided into different Austenitic, martensitic, Ferritic,, which on the market a large number of outstanding, used in making building decoration, household electric appliance, daily necessities, such as stainless steel is mainly austenite stainless steel. Coupled with a large number of industrial uses, so the consumption of austenitic stainless steel accounted for nearly 80% of total consumption of stainless steel. Austenitic stainless steel according to its chemical composition is divided into chromium nickel and chromium manganese series two series, that is, we often say the 300 series and 200 series.
The 300 series stainless steel chromium nickel stainless steel, in the formation of iron and chromium iron prime structure continuous addition of nickel to austenite structure increased, until all of the iron element structure changes for Austenitic structure is formed the 300 series stainless steel, non-magnetic. In the 200 series stainless steel, is to replace nickel with manganese and nitrogen enough, the lower the content of nickel, to be added with manganese and nitrogen is higher, to form a 100% of the austenitic structure, so the 200 series stainless steel have austenitic steel without magnetic properties. Generally speaking, the 300 series stainless steel in general in 8%, while the 200 stainless steel containing nickel in the 300 series stainless steel with half the amount of nickel.
Initial 200 series stainless steel is the United States to resolve the difficulties during World War II nickel supply is a serious shortage of research and development of, as the strategic materials of nickel in various countries are strictly control the use of, the United States first developed with low nickel 200 series stainless steel products, but due to the resistance to intergranular corrosion and corrosion resistance ability was significantly lower than that of 300 series stainless steel, resulting in its scope of application has greater limitations, only as the emergency and supplement of the 300 series products. In recent years due to the high nickel prices, resulting in 300 series stainless steel prices are too high, relatively cheap price of 200 series stainless steel production increased accordingly.