Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [processes and techniques by material]
6. [metalworking and metalworking processes and techniques]
7. [metalworking processes and techniques]
8. [metal assembling processes and techniques]

Narrower term/s

• braze welding
• electric welding[+]
  • resistance welding
  • arc welding [+]
    • projection welding
    • shielded metal arc welding
    • stud welding
• forge welding
• friction welding
• fusion welding[+]
  • electron beam welding
  • gas welding
  • laser welding
• pressure welding[+]
  • cold-welding
  • ultrasonic welding

Anotations

Scope note:

Refers to the process of joining two pieces of metal by softening or melting both surfaces to be joined by the application of heat, with or without inserting filler metal and with or without the application of pressure. For the metal joining process that necessarily involves the insertion of solder but not necessarily the softening or melting of the surfaces to be joined, see "soldering" for the process carried out at temperatures below 750 degrees Celsius, or "brazing" for the similar process carried out at temperatures ranging between 750 and 900 degrees Celsius.