Butt joint of stainless steel composite plate
Thread Content
For the butt weld of the stainless steel clad plate consisting of 28 (Q345R) + 3 (S30403), TIG welding was used for welding the Q345R layer together. The thickness of the weld metal produced by TIG welding is 3 mm. When selecting the TIG welding method, it is necessary to ensure that the weld metal covers the thickness of the base layer, i.e., 28 (Q345R) mm; but does it also need to cover the total thickness of the entire plate, which is 28 (Q345R) + 3 (S30403) = 31 mm?
It depends on the thickness gauge you use; better gauges can measure the thickness of both the base layer and the top coating separately, while inferior gauges either measure the total thickness or fail to provide any reading at all.
This post was last edited by Zhang Junli on 2020-6-30 at 15:01. A welding procedure qualification for composite steel plates is required, with the thicknesses to be calculated separately. Or weld overlay process qualification.