Welding Certificates: Welding Materials

	welding electrodes welding wire welding flux for arc welding carbon dioxide helium		argon protective gas mixture acetylene propane-butane IRF

Welding materials are called consumables used in welding.

Welding materials can perform the following functions:

provision of the necessary geometrical dimensions of the weld;
obtain weld metal with the required chemical composition and properties;
to protect the molten metal from the effects of air - the gas, slag, or gazoshlakovoy;
ensuring the stability of the welding process;
removal of harmful impurities from the weld metal.

Types of welding materials

Welding materials	Varieties
Welding electrodes and filler rods	consumable electrode coated (with acid, basic, rutile, cellulosic mixed coated), non-consumable electrode
Welding wire	solid, powder, activated
Fluxes	protective and conductive
Gas	protective (inert and active), combustible gases and gases that support combustion
Ceramic pads	for butt joints, corner and tee joints vsepozitsionnye, round and other types of

Welding electrodes and wires provide the electrical power supply in the welding zone heating. Melt-coated electrodes, flux cored wires and activated, the protective flux for arc welding contain special ingredients that can be designed to protect the metal from the air, maintaining the stability of the welding process, obtaining the necessary chemical composition of weld metal, etc. Filler rod is introduced into the weld at welding.

The main role of shielding gases - providing gas protection of the molten metal from the air. By the protective gases are inert (argon, helium and mixtures thereof), and active gases (carbon dioxide, and mixtures thereof). Inert gases do not enter into chemical reactions with the metal, and it almost does not dissolve. Active gases enter into chemical reactions with metal or dissolved in it.

Combustible gases and gases that support combustion of the gas used in welding and cutting. These include acetylene, propane-butane mixture, methylacetylene-allene fraction (IRF), hydrogen, and oxygen supports combustion.

Ceramic pads are used to ensure high quality of the seam and the formation of a reverse roll.

Welding consumables (electrodes, wire, filler rods) and divided by the type of welded steel and metals for welding carbon steels, nikzolegirovannyh steels, stainless steels, aluminum, copper, iron, etc.