|
|
 
|
 |
|
| |
|
| |
 |
| |
|
| |
|
Air Products offers a full range of standard shielding gas mixtures
for the TIG welding of all common material
types.
Our standard gases are available in traditional cylinder sizes
at 200 bar and 230 bar cylinder pressure. Further information
on cylinder contents, pressures and valve outlet connections can
be found on the Welding and Cutting Gases Cylinder Identification
sheet.
Our Standard shielding gases are named in accordance
with their chemical composition:
|
| |
|
|
| Hytec™ |
argon, hydrogen |
[Ar, H2
] |
| Astec TM xx |
argon, helium |
[Ar, He] |
| Protec TM xx |
nitrogen, hydrogen |
[N2, H2] |
| |
|
|
| [Note – where x = a number
between 0 and 9] |
|
| |
|
| |
| Material |
Shielding gas
manual mechanised
|
|
| Carbon
and low alloy steels |
Astec 30
|
Astec 30
|
argon
|
|
argon
|
argon
|
Stainless
steels
(austenitic) |
Hytec 2
|
Hytec 5
|
Hytec 5
|
|
argon
|
Hytec 2
|
Protec 5
|
| |
argon
|
argon
|
Stainless
steels
(ferritic and martensitic) |
Astec 30
|
Astec 50
|
argon
|
|
argon
|
Astec 30
|
| |
argon
|
| Aluminium
and alloys |
Astec 30
|
Astec 75
|
argon
|
|
argon
|
Astec 50
|
|
| |
|
| |
| |
 |
| |
|
| |
|
|
TIG (tungsten inert gas) welding is a high-quality welding technique
with a low fusion rate. The arc burns between a tungsten electrode
and the workpiece; the electrode does not melt, so it acts only
as a current conductor and arc carrier.
For thin sheet metal work, TIG welding can be used without a
filler metal.For thicker items or when joining different materials,
a filler metal is used in the form of a handheld rod or a wire
supplied by a separate feed device, generally currentless.In standard
TIG welding the arc is free, but a variant known as plasma welding
uses a secondary nozzle to constrict the arc.
|
| |
| |
| |
| |
| |
| |
| |
|
The melt, the hot tungsten electrode and the molten end of the
filler metal are protected from the atmosphere by an envelope
of inert gas. Argon is generally used, although there are quality
and productivity advantages in using a mixture of either argon
and helium or argon and reduced hydrogen
|
| |
| |
 Back
to top |
|
| |
|
|
|
