Welding

Welding is a fabrication process that joins materials, in our case metals, by causing coalescence (to join into a single mass or whole). This is often done by melting the work pieces and adding a filler material to form a pool of molten material (the weld pool) that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. At Stratford Metal Fabrications we use different methods to weld mild steel, stainless steel and aluminium, the welding techniques we use primarily are:

  • MMA
  • MIG
  • TIG

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Technical bit:

  • MMA welding (manual metal arc), also known as “stick welding” – uses an electrode that has flux, the protectant for the puddle, around it. The electrode holder holds the electrode as it slowly melts away. Slag protects the weld puddle from atmospheric contamination
  • MIG welding (metal, inert gas) – uses a wire feeding gun that feeds wire at an adjustable speed and flows an argon-based shielding gas or a mix of argon and carbon dioxide (CO2) over the weld puddle to protect it from atmospheric contamination
  • TIG welding (tungsten, inert gas) – uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by an inert shielding gas such as Argon or Helium         IMG_3052                       

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