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What is the reason for the fracture of 304 stainless steel pipe?

Shandong Xinhe International Trade Co., Ltd2022-10-18

Because of its superior performance, 304 stainless steel pipes are widely used in all walks of life. Sometimes deep processing is required, such as bending, punching, etc., which may break during deep processing. Why does this happen? What is the reason for the fracture of 304 stainless steel pipe?

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 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.

The causes of corrosion cracking of 304 stainless steel pipes include excessive polishing of stainless steel welds and inferior stainless steel raw materials. Corrosion cracking will cause the safety of pipe use and cause certain economic losses. Therefore, corrosion must be prevented to avoid unnecessary troubles. In addition, to strictly control the use environment of 304 stainless steel pipe is one of the effective ways to solve the cracking of stainless steel welded pipe.

If you want to get high-quality stainless steel products, you need to find a professional stainless steel manufacturer. As a professional stainless steel manufacturer, Shandong Xinhe International Trade Co., Ltd. is very willing to cooperate with you. If you have any questions about stainless steel or want to inquire about stainless steel prices, you can contact me, we are happy to serve you.