Stainless steels and heat resistant steels can be welded by melting and pressure welding methods used in unalloyed and low-alloy steels, except for some limitations. Welding process of stainless and heat-resistant steels requires the properties expected from the main metal to be welded, for example; may vary depending on corrosion and heat resistance. The welding material to be used must be in the same composition as the base metal or higher alloy for some applications. The surface of stabilized stainless steels and weld metal cannot be polished too much, Stabilized stainless steels can be welded both with welding materials of the same composition and with low-carbon welding materials, If low-carbon stainless steels are possible, welding should only be done with low carbon welding materials, Nitrogen (N) -alloyed stainless steels should be welded with normal (N-unalloyed) welding materials with high mechanical properties. The mixture with the base metal should be kept as low as possible. As thermal expansion is high, centering should be done with short passes to reduce deformation, As it has low thermal conductivity, it causes excessive heat accumulation in the welding zone, therefore the heat input should be limited. In order to obtain a clean metallic surface, post-weld heat treatment is necessary, so that an error-free passive surface can be obtained | 
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