316 remains magnetic after welding
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Has anyone noticed that 316 butt welds remain magnetic after welding?
Have you noticed that the elliptical heads made of 316 material have a magnetic layer in the transition section?
Some tissues have undergone changes, showing martensitic or ferritic structure
Any material that exhibits cold work hardening is magnetic
Welding of austenitic stainless steel generally does not result in ferromagnetism. When austenitic stainless steel sheets are bent or stamped significantly, ferrite is formed at the areas of deformation, but not in other areas.
The ferrite content in the weld must be controlled； Cold-formed heads consider solution treatment based on operating conditions.
It is likely that the microstructure changes due to heating during welding, resulting in an excessive amount of ferrite.
During the compression process, austenite transforms into martensite. . . So it has magnetism