Welding issues
Thread Content
This post was last edited by li*aoli Li on 2018-3-18 at 10:58. Cracks appear when welding 201 stainless steel using carbon dioxide shielded welding; the wire used is a carbon steel cored wire (SH Y71T-1). Is there any way to fix this? Can stainless steel suffer from intergranular corrosion?
As far as I know, it is best not to use ordinary carbon steel electrodes for welding stainless steel
In my opinion, the welding electrode should ideally be of the same or similar nature as the material being welded, as this helps to minimize the stress generated after welding and thus reduces the risk of cracking. For pressure vessels, it’s only possible to clean the weld area thoroughly; perhaps using an electrode made of a different material would be a good option to consider
Judging from the shape of the welds, you are an experienced worker with a very high level of welding skill
This post was last edited by li*aoli Li on 2018-3-18 10:58. Thank you for your advice
This post was last edited by li*aoli Li on 2018-3-27 01:35. I wonder what the results will be if we try using stainless steel welding rods again
Grind off all the welds, prepare a good bevel, and weld again
The remedial measure is to remove the original weld, grind the groove properly, and weld again using new welding wire.
If it is a high-voltage device, it must be handled properly; otherwise, hidden damage can be very dangerous
The remedial measure is to remove the original weld, grind the groove properly, and then weld again using welding wire of the same or similar properties as the main weld material.