Currently in the Chinese market sales of stainless steel is mainly 300 series and 200 series, the difference between the two is the amount of chemical element nickel content, which caused them in the performance and price of the huge difference.
At the current level of nickel prices, nickel content is very low 200 series stainless steel price is only about half of the 300 series stainless steel, corrosion and toughness in the spring performance is far worse than the 300 series stainless steel, only applicable to the cabinet food processing and other fields, if used in the construction, medical equipment, the field of the basket, there will be a great deal of hidden trouble. Nickel content of about 1% of the 200 series products, can not be subjected to general atmospheric corrosion.
300 series stainless steel is also known as 18-8 steel, is the fasteners, joints, tubes and pipes the most commonly used materials. 18-8 steel is the nominal content of chromium and nickel in 300 series stainless steel, these materials on the surface of the good corrosion resistance, but due to the deposition of carbon, it will make the chromium content decline. Chromium combines with carbon at high temperatures to form chromium carbide, which is not rust resistant.
400 series stainless steel chromium content than 300 series stainless steel low, but not like 300 series have carbon deposition problems, and can be heat-treated, but because of the chromium content of only 12% of 14%, in the environment of a serious chemical atmosphere will corrode the use of 300 series containing 16% of 20% of chromium, will not corrode. 300 series stainless steel and 400 series stainless steel in the same strength.
Post time: Mar-05-2024