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304 stainless steel rod Feature
1. The use environment of chlorine ion is widespread, such as salt, HanJi, sea, sea wind, soil and so on. Stainless steel in the presence of chloride ions in the environment, corrosion soon, even more than ordinary low carbon steel. So the use of stainless steel environmental requirements, and often need to wipe, remove dirt, keep clean and dry. (so that you can give him a "misuse".) The United States has an example: a certain enterprise with a oak containerized chlorine ion solution, the container has been used more than hundred years, in the ninety s, plans to change, because the oak not enough modern, stainless steel to replace 16 days after container due to corrosion leakage.
2.Without solid solution treatment: alloy elements into matrix, the matrix organization alloy content is low, the corrosion resistance is poor.
3.This does not contain titanium and niobium material have a natural propensity to intergranular corrosion: join titanium and niobium, combined with stable processing, can reduce the intergranular corrosion. In air or chemical corrosion resistant to corrosion medium of a kind of high alloy steel, stainless steel is a beautiful surface and corrosion resistant performance is good, need not after surface treatment, such as color of plating and the surface of the stainless steel inherent performance, used in a variety of steel a, often called stainless steel. On behalf of the performance of 13 chrome steel, 18-8 chrome-nickel steel high alloy steel.
From the perspective of metallography analysis, because the stainless steel containing chromium and make the surface form very thin chromium film, the film is isolated from intrusion in the steel corrosion of oxygen. In order to keep inherent corrosion resistance of stainless steel, steel must contain more than 12% of chromium
304 is a kind of common stainless steel, it is widely used to make for a good comprehensive performance, corrosion resistance and formability of equipment and parts. 304 stainless steel is according to the United States ASTM standards to produce a brand of stainless steel. 304 is equivalent to our country 0 cr19ni9 (0 cr18ni9) stainless steel. 304 19% chromium and nickel 19%.
304 l is a variation of carbon content lower 304 stainless steel, welding is applied to the occasion. Low carbon content is made in the heat affected zone near the weld in the precipitation of carbide to a minimum, and may result in precipitation of carbide stainless steel intergranular corrosion in some environments.
304 is the most widely used stainless steel, heat-resistant steel. Used in food production equipment, wast, general chemical equipment, nuclear power, etc.