|
Thoriated tungsten
Thoriated
tungsten is the most commonly used tungsten material, Thoria is
a low-level radioactive material, but it was the first to
display a significant improvement over pure tungsten.
Thoriated tungsten is a good general use tungsten for DC
applications, because it operates well even when overload with
extra amperage, thus improves the performance of welding.
|
Trade
mark
|
ThO2
Content（%）
|
Color
sign
|
|
WT10
|
0.90
- 1.20
|
Primary
|
|
WT20
|
1.80
- 2.20
|
Red
|
|
WT30
|
2.80
- 3.20
|
Purple
|
|
WT40
|
3.80
- 4.20
|
Orange
Primary
|
Pure
Tungsten Electrode:Suitable
for welding under alternating current
|
Electrode
Name
|
Trade
mark
|
Added
impurity
|
Impurity
quantity
|
Other
impurities
|
Tungsten
|
Electric
discharged
power
|
Color
sign
|
|
Pure
Tungsten Electrode
|
WP
|
--
|
--
|
<0.20%
|
The
rest
|
4.5
|
Green
|
|
