Aoshi slow for stainless steel in 450-850 ℃ warming or cooling, Crystal asked corrosion can occur. Higher carbon content, intergranular corrosion tendency to be. In addition, in weld heat - affected zone of intergranular corrosion can also occur. This is because on the grain boundary precipitation of Cr - rich Cr23C6. Depleted chromium the substrate around it, thus forming corrosion caused by the original battery. This phenomenon of intergranular corrosion in ferritic stainless steel in the mentioned earlier is also exist.
