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304 Stainless Steel Pipe Processing Is The Cause Of Fracture

2022-08-26 14:12

304 stainless steel tube contains a variety of metal elements, such as: chromium, nickel, carbon, iron, etc. It is precisely because of the existence of these metal elements that stainless steel pipes have good ductility and corrosion resistance. 304 stainless steel pipe has the advantages of low elongation, high elasticity, high hardening index, short plastic deformation stage from yielding to fracture, etc. After deep drawing deformation, deep drawing cracking sometimes occurs, and cracking occurs immediately when it is pulled out from the die. Shock or vibration sometimes occurs after deep-drawing deformation, and after deep-drawing deformation occurs after storage or use for a period of time.

The cold work hardening index of austenitic stainless steel is 0.34. 304 stainless steel pipe is a metastable type, which will undergo phase transformation during deformation and induce martensitic structure. The martensitic structure is brittle and easy to crack. During the plastic deformation process , with the increase of deformation, the higher the content of induced martensite structure, the greater the residual stress, and the easier cracks occur during processing.

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