Seeking advice on welding cracks
Thread Content
Welding was carried out on the threads of an atmospheric-pressure water storage tank; both the tank body and the threads were made of 0Cr18Ni9, and weld rod A132 was used. Cracks appeared in the welds between the threads and the tank body after welding. What is the reason?
First, the welding rod made of 304 material is of type A102. Also, what is the thickness of the cylinder wall of your equipment? Are they cracks that occurred after welding? Did you perform pre-welding heating? Also, if all the process parameters are correct, you should conduct various chemical analysis tests on the steel plate to check whether there are any issues with its material quality.
Ordinary stainless steel has very good weldability and usually does not crack. If the material is fine, it might be due to a large alignment gap. Because stainless steel has significant welding deformation.
What is the material of your storage tank?
Also, if too high a current is used, heat cracks can occur. In our factory, many people fear that the welding process won’t achieve full penetration, so they use very high currents, which in turn leads to the formation of long heat cracks.