The Welding Characteristics of Austenitic Stainless Steels

There are a number of typical austenitic stainless steels, such as SUS303, SUS304, SUS309, SUS316, SUS317 and so on. They have been treated as the most widely used stainless steels. In addition, their weldability is very excellent; however, some unexpected problems occur in the welding process as well. They are as follows:
1. Intergranular corrosion
According to the theory, intergranular corrosion is an universal phenomenon which is very easy to occur around the welded joint.
2. Welding thermal crack
The main reason of thermal crack is that the welded dendrites are very directive, which is conductive to the formation and aggregation of low melting eutectic product of phosphonium and sulfur. In addition, the coefficient of thermal conductivity is very small while the coefficient of thermal expansion is large. As a consequence, the welding stress is very large, which prompt the occurrence of thermal crack.
3. Stress corrosion crack
4. Low-temperature brittleness of welding metal
5. σ phase brittleness of welded joint
Austenitic stainless steel plays a significant role in stainless steel industry. Hongchao Stainless Steel, INC supplies all kinds of austenitic stainless steels and other stainless steels, such as martensite stainless steels, ferritic stainless steels, etc. with relatively high quality and competitive price. For more information, please feel free to contact us via email: Your kind inquiries are highly appreciated.
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