Welding wire is a consumable electrode or filler material used in various welding processes (e.g., MIG, TIG, flux-cored) to join metals. It melts during welding to form the weld bead.

Common types include:

• Solid wire (for MIG welding).

• Flux-cored wire (self-shielded or gas-shielded).

• Metal-cored wire.

• Stainless steel, aluminum, or carbon steel wire.

Wire diameter depends on:

• Base metal thickness.

• Welding process (e.g., thinner wire for sheet metal, thicker for heavy-duty applications).

• Manufacturer recommendations (check data sheets).

Porosity is often due to:

• Moisture in flux-cored wire.

• Contaminated base metal (oil, rust).

• Insufficient shielding gas flow (for gas-shielded processes).

• Wear PPE (gloves, helmet, respirator).

• Ensure proper ventilation to avoid fumes.

• Ground equipment to prevent electric shock.

No. Match the wire composition to the base metal (e.g., stainless steel wire for stainless steel, aluminum wire for aluminum). Always check AWS/ISO standards (e.g., AWS A5.18 for carbon steel).