Can you weld aluminum to inox?

Yes, it is possible to join aluminium and stainless steel parts even though both materials are known to be difficult to weld.
Unlike stainless steel, aluminium is a light metal that welds at low temperatures. Joining these materials with conventional welding processes is therefore very difficult.
Friction stir welding (FSW) is a solid state joining process without melting. The choice of the right FSW tool for the application will ensure that parts made of dissimilar materials such as aluminium and stainless steel are joined.