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39.00
ENGWELD NM250 18/90 Cutting Torch
ENGWELD NM250 18/90 Cutting Torch
99.00
4.0MM SANDVIK 25/22/2 LMNB Electrode per 14.7 kilo Carton - Reduced to Clear
4.0MM SANDVIK 25/22/2 LMNB Electrode per 14.7 kilo Carton - Reduced to Clear
10.95
500 Amp Magnetic Earth Clamp
500 Amp Magnetic Earth Clamp
59.00
METABO W1080 115mm 110v Angle Grinder
METABO W1080 115mm 110v Angle Grinder
5.25
BOSCH 2607001922 2PZ 25mm Bits X10
BOSCH 2607001922 2PZ 25mm Bits X10
125.00
GSB10.8-2LI DRILL + GML10.8VLI RADIO    CLEARANCE PRICE - BRAND NEW STOCK
GSB10.8-2LI DRILL + GML10.8VLI RADIO CLEARANCE PRICE - BRAND NEW STOCK
79.00
METABO W2000 230mm 110v Angle Grinder
METABO W2000 230mm 110v Angle Grinder
59.00
METABO W1080 115mm 240v Angle Grinder
METABO W1080 115mm 240v Angle Grinder
7.95
115 x 1.0mm 10 ENGWELD Inox Discs       10 In Tin
115 x 1.0mm 10 ENGWELD Inox Discs 10 In Tin
79.00
METABO W2000 230mm 240v Angle Grinder
METABO W2000 230mm 240v Angle Grinder
39.00
ENGWELD NM250 18/90 Cutting Torch
ENGWELD NM250 18/90 Cutting Torch
99.00
4.0MM SANDVIK 25/22/2 LMNB Electrode per 14.7 kilo Carton - Reduced to Clear
4.0MM SANDVIK 25/22/2 LMNB Electrode per 14.7 kilo Carton - Reduced to Clear
10.95
500 Amp Magnetic Earth Clamp
500 Amp Magnetic Earth Clamp
59.00
METABO W1080 115mm 110v Angle Grinder
METABO W1080 115mm 110v Angle Grinder
5.25
BOSCH 2607001922 2PZ 25mm Bits X10
BOSCH 2607001922 2PZ 25mm Bits X10
125.00
GSB10.8-2LI DRILL + GML10.8VLI RADIO    CLEARANCE PRICE - BRAND NEW STOCK
GSB10.8-2LI DRILL + GML10.8VLI RADIO CLEARANCE PRICE - BRAND NEW STOCK
79.00
METABO W2000 230mm 110v Angle Grinder
METABO W2000 230mm 110v Angle Grinder
59.00
METABO W1080 115mm 240v Angle Grinder
METABO W1080 115mm 240v Angle Grinder
7.95
115 x 1.0mm 10 ENGWELD Inox Discs       10 In Tin
115 x 1.0mm 10 ENGWELD Inox Discs 10 In Tin
79.00
METABO W2000 230mm 240v Angle Grinder
METABO W2000 230mm 240v Angle Grinder
 
 

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Home » Advice Centre » 3

MMA Welding

Welding with stick electrodes is called Manual Metal Arc (MMA)welding or Shielded Metal Arc Welding (SMAW). It is the oldest and most versatile of the various arc welding processes.

An electric arc is maintained between the end of a coated metal electrode and the work piece. As molten metal droplets from the electrode are transferred across the arc and into the molten weld puddle, they are shielded from the atmosphere by the gases produced from the decomposition of the flux coating. The molten slag floats to the top of the weld puddle where it protects the weld metal from the atmosphere during solidification. The slag must be removed after depositing each weld run.

mma welding

Hundreds of different varieties of electrodes are produced, often containing alloys to add durability, strength and ductility to the weld. The process is mostly used for ferrous alloys in the structural steelwork, shipbuilding and general fabrication industries.Repair and maintenance is another important application for MMA. Despite the relative slowness of the process, because of electrode changes and slag removal, it remains one of the most flexible techniques and has advantages in areas of restricted access.

 

 

Reproduced by kind permission of ESAB Group (UK) Ltd

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