What is the reason for cracking of thin-walled stainless steel pipes?
Thin-walled stainless steel pipes are widely used in motor housings, electrical casings, bathroom hardware, etc. due to their corrosion resistance, good processing performance, and thin walls. However, they may crack due to certain reasons during the processing process. So, what causes the cracking of thin-walled stainless steel pipes?
Stainless steel contains a variety of metal elements, such as chromium, nickel, carbon, iron, etc. It is precisely because of their existence that they have good ductility and corrosion resistance. However, if the carbon content in thin-walled stainless steel pipes is high, the material will be harder. Because the pipe is harder and not easy to weld, cracking may occur after welding.
If the welding material is not selected correctly, the steel pipe itself cannot support itself, and creep occurs under the combined action of high temperature and load. In addition, the embrittlement of austenitic welded joints under high temperature and thermal stress deformation caused by steam condensation will cause deformation and cracking of stainless steel thin-walled pipes. Secondly, if the weld of the welded pipe is exposed outside, it is also one of the reasons for cracking. In addition, the low tensile strength of the material will also cause cracking.
So, what should we do if the stainless steel pipe cracks? As Gangzheng Stainless Steel just mentioned, there are many reasons for cracking, and the corresponding measures for different reasons for cracking are also different. We cannot treat all problems uniformly, let alone use one method to solve them uniformly. If we just blindly weld the cracks of thin-walled stainless steel pipes quickly and ignore the quality of welding, it will also cause the welding to break. This situation is often encountered by processing masters at work. At this time, we should first remove the pollution of the welding interface and then adjust the welding speed appropriately.
Many times when we weld stainless steel precision tubes, we forget to use protective and combustion-supporting gases, which directly causes oxidation of the welding parts, and the welding interface is naturally prone to breakage. Therefore, we must carefully keep the combustion-supporting gas and use it reasonably. In this way, we can effectively avoid cracking and breaking during pipe welding.
The above is the content of what causes cracking of thin-walled stainless steel pipes. High hardness, incorrect selection of welding materials, exposure of welds outside, and low material tensile strength can all cause cracking of stainless steel welded pipes. As for weld cracking, you can first remove the contamination of the welding interface, then adjust the welding speed appropriately, and remember to add and preserve the combustion-supporting gas, so as to avoid cracking and breakage when welding thin-walled stainless steel pipes.

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