What is another word for butt-welding?
Pronunciation: [bˈʌtwˈɛldɪŋ] (IPA) 
Butt-welding is a type of welding that involves joining two metal parts in a manner where the parts are aligned end to end, creating a single joint without the use of any filler metal. Other synonyms for the term butt-welding could include seam welding, fusion welding, and autogenous welding. Seam welding involves using an electric current to join two metal parts along the entire length of the edges. Fusion welding generally implies that a filler metal is being used to join two metal parts. Autogenous welding, on the other hand, implies that no filler material is used in the welding process. Ultimately, all of these different terms refer to the process of joining two metal parts by heat and pressure.
