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Stainless steel fastener has the advantages of corrosion resistance, high quality and appearance of the image, and high strength steel (between about 6.8 ~ 8.8), easy fabrication and welding, do not need to paint, plating and heat treatment, can be 100% recycled.Whether in manufacturing, use and deal with the impact on the environment and burden is the smallest.Although the initial cost is higher, the life cycle cost is low, but the parts of the most economical solution.Nickel elementOn global nickel demand expanding and common in recent years the domestic stainless steel related products industry a good environment, the international nickel prices rose more than 130%, and directly increase the nickel content is 8% ~ 8% of the price of austenitic 300 series stainless steel fasteners, in the middle and lower reaches of the industrial chain of fastener manufacturers and dealers to eager to reduce the impact of the higher costs, looking for alternative materials, then appeared on the market of low nickel stainless steel products.magneticIn general, in the Chinese understanding is not magnetic stainless steel.Little imagine, austenite in series material after cold working processing, because of stress concentration with magnetic is normal (different elements content in different, different size of the magnetic. Reference standards: GB/T3098.6-2000).Chromium and manganese stainless steel (series 200) on the no magnetic, instead of being mistaken for ordinary 300 series stainless steel.Many non-standard businessman realistic-looking, use nickel under 1% or chromium content is low as 304 brand stainless steel products, some even directly in A2-70 of fasteners on bidding, market confusion.Only with and without magnetic to judge the quality of stainless steel is not scientific, is also a wrong idea.Large amounts of chromium manganese series (series 200) products, and does not take the place of the 300 series is used in the coastal areas of high corrosive medium, especially heavy industry field, such as chemical, petrochemical, nuclear power and other related machine parts more seriously., taiyuan and other large domestic steel companies announced his retirement from 200 series stainless steel production, the Chinese government has a series of meetings, and enact related laws, to remind consumers and dealers pay attention to the using of the series 200, chromium manganese stainless steel specification.