Welding issues
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1. Copper pipes and A3 steel pipes; 2. Aluminum pipes and A3 steel pipes. How should these two types of pipes be welded to ensure a strong connection and to prevent leakage under a water pressure of 0.5 MPa?
I’m afraid it won’t be possible to weld them; it’s better to use other methods of connection.
I’ve never seen welding of this kind across different materials.
For pipe-to-pipe connections, the key considerations are choosing the appropriate welding electrode and groove shape, as well as the fit gap. Additionally, it is necessary to determine whether full penetration is required, and whether TIG welding for root pass is needed Anything should be evaluated through a welding test before welding it, and welding can only proceed once the evaluation is successful.
It’s quite difficult; I don’t know why welding different materials in this way is necessary
Using brazing might work, or TIG welding
Cooler, which is immersed in the oil inside the housing; cooled by copper tubes, but the external connections are made of A3 steel
Can it be changed to a threaded connection? Or take a look at how those air conditioners or other heat exchange devices are connected? Brazing might work, or you can call some manufacturers directly and ask their professional staff to see if there are any good solutions.