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Corrosion resistance[ edit ] stainless steel has excellent resistance to a wide range of atmospheric environments and many corrosive media.
For more severe corrosion conditions, when stainless steel is too sensitive to pitting or crevice corrosion by chlorides or general corrosion in acidic applications, it is commonly replaced by stainless steel. Application[ edit ] stainless steel is used for a variety of household and industrial applications such as food handling and processing equipment, screws,  machinery parts, and car headers. It is also a common coil material for vaporizers. Difference between , H and L[ edit ] They all possess the same nominal chromium and nickel contents and thus possess the same corrosion resistance, ease of fabrication and weldability.
Sensitization is the formation of chromium carbides along grain boundaries when a stainless steel is exposed to temperatures in the range of approx. The subsequent formation of chromium carbide results in reduced corrosion resistance along the grain boundary leaving the stainless steel susceptible to unanticipated corrosion in an environment where would be expected to be corrosion resistant.
This grain boundary corrosive attack is known as intergranular corrosion. Thus is not useful for corrosive applications where welding is required such as tanks and pipes where corrosive solutions are involved, thus, L is preferred. And its lack of a minimum carbon content is not ideal for high temperature applications where optimal strength is required, thus, H is preferred.
Thus is typically restricted to bars that will be machined into components where welding is not required or thin sheets that are formed in articles such as kitchen sinks or cookware that are also not welded. However, nitrogen also has a strong influence on room temperature strength and a tiny addition of nitrogen produces L with the same tensile strength as
Stahlschlüssel - Key to Steel 2013