Subject: Heat-resistant properties of stainless steel
Author: meishengchao
Posted on: 05/20/2016 03:18:21 AM
Heat resistance at high temperatures means that stainless steel can maintain its excellent mechanical properties.Common Specification Table of aluminum pipe
Influence of carbon: carbon in austenitic stainless steels are the formation of a strong and stable. Given the expansion of austenite and austenite element region. Carbon austenite forming ability of about 30 times that of the nickel, carbon is an interstitial element, solid solution strengthening can significantly improve the strength of austenitic stainless steel. Carbon austenitic stainless steel can also improve performance in a high concentration of chloride (eg boiling 42% MgCl2 solution) in resistance to stress corrosion.stainless steel wire largest manufacturer
However, in austenitic stainless steels, carbon is often regarded as harmful elements, mainly due to the corrosion of the stainless steel under some conditions of use (such as by welding or by heating 450 ~ 850 ℃), with carbon steel Cr23C6 type carbon chromium compounds to form a high chromium causing local depletion of chromium, the steel corrosion resistance particularly resistance to intergranular corrosion decrease. therefore. Chrome-nickel austenitic stainless steel is mostly carbon content since the 1960s, the new development is less than 0.03% or 0.02% of ultra-low carbon type, it is known as the carbon content decreases, intergranular corrosion susceptibility of steel decreases when the carbon content of less than 0.02% that has the most significant effect, some experimental pearl also noted that carbon will increase the tendency of pitting points chromium austenitic stainless steel. Due to the harmful effects of carbon, not only in the austenitic stainless steel smelting and over should be required to control the carbon content as low as possible, and in the subsequent heat, cold and heat treatment process also prevents the surface by carbon steel and chromium-free carbide precipitationMaterial Composition Of Tungsten Carbide
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