joint interface between the two elements made in such a manner that on the one side of the interface only metal out of the one carrier material and on the other side only metal of the other carrier material is present for example the weld joint interface is made by an electron beam welding the surface of the weld joint can be enamelled and the welding of the two elements can be performed by a normal melt welding method in which welding material out of the metal of the respective carrier materials is laid on application_number US 19390988 A description as explained above the weld joint and method of the present invention can be used to join for example heads to reactor bodies and conduit attachments to either heads or reactor bodies both elements of dissimilar metal which would then be coated with glass or enamel it is also possible to use the weld joint and the method of the present invention to join dissimilar metal elements together wherein one of the metal elements itself is of a highly corrosion resistant alloy thus eliminating the need to coat that element with glass or enamel however where such dissimilar metal elements are joined it is highly desirable to coat both the non corrosion resistant element and the weld joint with glass or enamel as well as extending the glass coating beyond the weld joint onto the.