16ME316/Advanced Processes/T.Venkatajalapathi Welding 16ME316/Advanced

1 Atomic Welding  Atomic hydrogen welding (AHW) is an process that makes use of an arc between two metal within an

atmosphere composed of hydrogen. Shielding is obtained from the T.Venkatajalapathi hydrogen.

 The electric arc produced in the process efficiently breaks up the molecules of hydrogen that later recombine through an extreme release of

heat. 16ME316/Advanced Welding Processes/ Welding 16ME316/Advanced

2 Equipments Required  2 tungsten .

 Hydrogen gas cylinder with regulator and hose.

 Electrode holder or torch.

 300 V AC power supply machine with controller.

 Filler rod if needed.

Processes/T.Venkatajalapathi 16ME316/Advanced Welding Welding 16ME316/Advanced

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Atomic Hydrogen Welding

Processes/T.Venkatajalapathi 16ME316/Advanced Welding Welding 16ME316/Advanced

4 limitations  Cost of welding by this process is slightly higher than with the other process.

 Welding is limited to flat positions only.

 Because of the high levels of heat produced in this welding process, need to be even more aware of the dangers they are exposed to.

 Skilled is required.

 Due to advances in inert gases AHW may be limited.

 Hydrogen is highly inflammable gas so it should be taken care.

Processes/T.Venkatajalapathi 16ME316/Advanced Welding Welding 16ME316/Advanced

5 Applications  Atomic hydrogen welding is used in those applications where rapid welding is necessary, as for stainless steels and other special alloys.

 For most of the ferrous and non ferrous metals.

 For thick as well as thin sheets or small diameter wires (2-10mm).

 Can be applied almost to any metal, specially in light gauge metal,

special ferrous alloys, and most non ferrous metals and alloys.

Processes/T.Venkatajalapathi 16ME316/Advanced Welding Welding 16ME316/Advanced

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