ADDRESS:Fukang Road, Dainan Town, Xinghua City,Jiangsu Province, China
We often think that stainless steel wire rod magnet adsorption to verify their quality and authenticity, not non-magnetic, that is good, genuine; there are magnetic, so thought to be counterfeit, fake. Originally, this is an extremely one-sided and wrong method. Fact that stainless steel wire rod will be "rust", also with magnetic stainless steel wire is to go beyond the 60% of iron base, participate in the complex, nickel, molybdenum and other alloying elements for high alloy steels, corrosion-resistant to its most prominent feature is a strong, but not absolutely no rust the stainless steel wire rod. Or some serious air pollution in coastal areas, when the content of chlorine ions in the air is large, exposed stainless steel wire in the atmosphere looks to be some rust spots, but the Rust being restricted to appearance, not corrosive to stainless steel wire inside the matrix.
Many varieties of stainless steel wire, most with magnetic, so the magnet adsorption is not a scientific method to identify stainless steel wire. Often used as a decorative tube sheets are mostly of austenitic 304 stainless steel wire rod material, generally non-magnetic or flux-weakening, caused by smelting the chemical composition fluctuation magnetic or process State may also occur, but it cannot be considered to be counterfeit or substandard, why is this?
Mentioned above is non-magnetic austenite or weakly magnetic, martensite or ferrite is magnetic, due to segregation when smelting or improper heat treatment, causes of austenitic 304 stainless steel wire in a small amount of martensite or ferrite. In this way, with 304 stainless steel wire will become weak magnetism.
In addition, 304 stainless steel wire by cold working, organizing structure will transform to martensite, cold deformation of larger martensite transformation of more, bigger the magnetic properties of steel. Lot number of steel, produced, PHI 76, no significant magnetic induction; produced diameter of 9.5, Ling bending deformation due to magnetic induction; produced square and rectangular tubes due to large deformation of pipe, especially the angle, and more significantly more intense magnetic.
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