Related Clues:

• Fuse with a torch
• Fuse metal together
• Join, in a way
• Fuse with heat
• Put the metal to the metal
• Ironworker's union?
• Iron worker's union
• Bond, of a sort
• Join closely
• Join with a blowtorch
• Unite with heat
• Make circular metal joints
• Get married around fifty and make it stick
• Bond of a sort
• Join together, in a way