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The four most common welding processes are:

MIG (Metal Inert Gas) welding, also known as MAG (Metal Active Gas) welding and GMAW (Gas Metal Arc Welding). In Europe, the term 'MIG' is used only when a totally inert gas shield like argon is used, and 'MAG' when the shielding gas also contains active constituents, such as carbon dioxide or oxygen. MIG is a high-productivity continuous process requiring little downtime and can be used semi-automatically, automatically and robotically.

TIG (Tungsten Inert Gas) welding, also known as GTAW (Gas Tungsten Arc Welding). TIG welding tends to be used for intricate work and where a high-quality finish is required.

FCAW (Flux Cored Arc Welding). FCAW is mainly limited to carbon and low-alloy steels and some types of stainless steel.

MMA (Manual Metal Arc) welding, also known as SMAW (Shielded Metal Arc Welding). MMA is ideally suited to outside and site work because the electrode coating generates its own shielding gas.

For any welding application, it is important to choose the right gas for the job. You can find out more about the welding process and the welding gases and equipment that BOC supplies, along with how to buy them, by clicking on the links below.


About the welding process

The gases used in welding perform an important function in that they shield the molten weld pool and molten filler material from the damaging effect of air.

Shielding Gases

For any welding process, it is important to choose the right shielding gas. BOC provides an extensive shielding gas range to meet all requirements.

Pureshield Argon

The role of argon is nearly always to exclude atmospheric air from contact with metal alloys such as purging gas to protect weld areas.

Argoshield Shielding Gases

BOC Argoshield is a premium range of shielding gases. Developed primarily for the MIG welding of steel, Argoshield gases deliver improved welding performance and a lower operating cost than other shielding gases.

Alushield Shielding Gases

BOC Alushield shielding gases are suitable for MIG and TIG welding copper and titanium alloys, as well as for TIG welding nickel alloys, stainless steel, carbon and alloy steels, where heat transfer or high welding speeds are important.

The Multi User Panel

Unique BOC solution for large welding jobs requiring multiple welders to work off a single source of gas, reducing cylinder handling and improving safety and productivity.

Welding Consumables

MMA electrodes, MIG/MAG wires, TIG/GTAW rods, gas-welding filler rods and fluxes are all available to buy online or from your local BOC retail outlet.

Welding Safety Products

BOC has selected a range of the most innovative and highly-rated welding safety products on the market to meet your safety requirements, available to buy online or in-store.

How to buy welding gases and equipment

Find out more about the different ways to buy welding products from BOC including how to buy via our online shop, how to locate your nearest BOC store and how to open a BOC account.

BOC Store Finder

BOC has over 70 stores and more than 300 agents and partners all around the UK. Use our Store Finder to locate your nearest one.

Buy gas, equipment and safety products online

You can now buy all your welding gas, equipment and safety products, as well as manage your BOC account, online. Visit our online store to find out more.

Industrial Products catalogue

View BOC’s Industrial Products catalogue to find out more about our welding equipment, welding consumables and trade tools.

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