Densimet
Tungsten Alloys
|
|
Densimet
alloys are materials with high tungsten content
and low amounts of NiFe or NiCu.
|
|
|
Advantages:
- High
density (17.0~18.5g/cm3).
- High
modulus of elasticity.
- Good
machinability.
- Harmless
to the health and environment.
- Good
mechanical properties
- High
absorption capacity against x-rays and ?-rays
Applications:
- Balancing
weights.
- Balls
in bomb.
- High
voltage electrical contact.
- Protection
shields for nuclear radiation.
- Electroheat
upsetting anvil block.
- Substitutional
material for Uranium.
-
|
Tungsten-Copper
Composites
|
|
WCu
composites are offered with 10?40wt.% Cu
Advantages:
- High
thermal conductiveity.
- Low
thermal expansion.
- High
arc resistance combined with good electrical
conductivity.
|
|
|
Applications:
- Arcing
contacts and vaccum contacts in high and
medium voltage breakers or vaccum interruptors.
- Electrodes
in spark erosion cutting machines.
- Heat
sinks as passive cooling elements of electronic
devices.
|
Tungsten
Bar
|
|
Appearance:
- The
tungsten bar is fine-grained and has a luster
rather like that of silver in uniform color.
- Though
the whole bar may slightly is curved, the
maximum height of the bend should not be
more than 15mm. It measures 12x12x510.
|
|
|
Applications:
Purified
tungsten bars are used as a material for making
special steels and tungsten wire, or used in electric
contact points. Tungsten bars with impurities are
used to procedure bulb filaments or electron tube
filaments, which are guaranteed to have remarkable
resistance to high temperature.
Technical
Data:
|
Impurity
quantity
|
Tungsten
|
Weight
|
Density
|
|
%
|
%
|
g/piece
|
g/cm3
|
|
<0.05
|
>99.5
|
1,200
|
17.6---18.2
|
|
Tungsten
Rod
|
|
Applications:
- For
producing electric light source parts and
electric vacuum components.
- For
producing heating elements and refractory
parts in high temperature furnaces.
- For
producing electric contacts.
|
|
|
Chemical
Composition
|
Trade
Mark
|
Tungsten
|
Impurity
Elements Content
|
|
Total%
|
Each%
|
|
WAL1
WAL2
|
>99.95
|
<0.05
|
<0.01
|
|
W1
|
>99.95
|
<0.05
|
<0.01
|
|
W2
|
>99.92
|
<0.08
|
<0.01
|
Type
and Size
|
Type
|
Swaged
Rods
|
Straightened
Rods after Drawn
|
Grand
rods available
|
|
Size
|
Ф2.4~50mm
|
Ф0.8~3.2mm
|
|
Tungsten
evaporation boats and coils
|
|
All
kinds of tungsten evaporation boats and coils are
available according to the requests of customers.
|
Tungsten
Granules
|
|
Appearance:
Particle
size:
- -12~+80
mesh, plus sieve material, <5%; minus,
<7%.
|
|
|
Impurity
Content:
Application:
|
WRe3/WRe25
Thermocouple
|
|
Applications:
|
|
|
Chemical
Composition:
|
Grade
|
Diameter
(mm)
|
Working
Temperature C
|
Accuracy
%
|
Uniformity(at1500?)
|
|
WRe3(+)
|
WRe25(-)
|
|
Gr.1
|
0.1
|
1800
|
±0.25
|
<
40
|
<
30
|
|
Gr.2
|
0.1,0.25,0.5
|
1800
|
±0.5
|
<
45
|
<
35
|
|
Tungsten
Thorium Wire and Rod
|
|
Grade
Use
|
Grade
|
Use
|
|
WTH7
|
Ratio
tube, Pothook of emissive tube. Spring.
High temperature electrode and cathode
of gas discharge lamp-house etc.
|
|
WTH10.
WTH15
|
Cathode
of ratio tube. Grid. High temperature
electrode and resistance shake filament
etc.
|
Norm
Table
|
Grade
|
WTH7
|
WTH10
|
WTH15
|
|
Max
diameter, um
|
1800
|
|
Min
diameter, um
|
150
|
Chemical
composition: %
|
Grade
|
W
content >
|
ThO2
content
|
Total
impurity content <
|
Every
impurity content <
|
|
WTH7
|
98.9
|
0.70-0.99
|
0.10
|
0.01
|
|
WTH10
|
98.41
|
1.00-1.49
|
0.10
|
0.01
|
|
WTH15
|
97.91
|
1.50-1.99
|
0.10
|
0.01
|
Diameter
tolerance:
|
Diameter
(d) UM
|
Weight
tolerance/200mm%
|
Diameter
tolerance %
|
|
I
class
|
II
class
|
I
class
|
II
class
|
|
150<d<300
|
±1.5
|
±2.0
|
-
|
-
|
|
200<d<350
|
±1.0
|
±1.5
|
-
|
-
|
|
350<d<500
|
-
|
-
|
±1.5
|
±2.0
|
|
d>500
|
-
|
-
|
±1.0
|
±1.5
|
Norm
table of spool and coil:
|
Diameter
(d) UM
|
Norm
of spool and coil, mm
|
|
Norm
of spool
|
Norm
of coil
|
|
Inner
diameter
|
Width
|
|
d<350
|
85
|
15-20
|
-
|
|
350<d<500
|
-
|
-
|
135
|
|
500<d<750
|
-
|
-
|
210
|
|
750<d<1200
|
-
|
-
|
350
|
|
1200<d<1800
|
-
|
-
|
600
|
Condition
of roll wire
|
Grade
diameter, um
|
Core
multiple
|
Rolling
way
|
Rolling
length
|
Condition
of heating
|
|
WTH7
WTH10
WTH15
260<d<800
|
4
|
Handwork
|
4-5
|
Temperature
600-800?
Heating
way, direct or indirect
|
|
WTH7
WTH10
WTH15
d<260
|
4
|
Handwork
|
4-5
|
Normal
temperature
|
|
Tungsten
Thorium Rod
|
|
Kind
|
Norm
|
Max
diameter
|
Min
diameter
|
|
Non-grinding
rod
|
Wrought
rod
|
10.0
|
2.8
|
|
Rectifying
straight rod
|
2.8
|
0.8
|
|
Grinding
rod
|
9.0
|
0.8
|
|
Size/Diameter,
mm
|
Diameter
tolerance, mm
|
|
0.8<d<1.5
|
1.0
|
1.5
|
0.02
|
|
1.5<d<3.0
|
1.5
|
2.0
|
0.03
|
|
3.0<d<6.5
|
1.5
|
2.0
|
0.03
|
|
6.5<d<10
|
1.5
|
2.0
|
0.08
|
Surface
quality:
- Surface
shows uniform black color, smooth. There
isn’t mildew, burr and oxidation and limitation
that can affect use.
- Wrought
rod: There isn’t crack, delaminating and
burr. Slight mark of forging hammer and
film oxide is allowed.
- Color
of surface: black or dark gray. Grinding
rod: There are not crack and longitudinal
lines.
- Color
of surface: metal luster.
|
Tungsten
Wire
|
|
Application:
- For
producing electric light source parts and
electric vacuum components.
- For
producing heating elements and refractory
parts in high temperature furnaces.
- For
producing heating elements used in vacuum
metalizing or plating.
|
|
|
Appearance:
- The
tungsten wire is is regular black covered
with graphite. After graphite removed it
is metallic luster.
Technical
Data
|
Specifications
|
10-15W
|
25-60W
|
100-200W
|
300-1000W
|
|
Impurity
quantity, %
|
0.05
|
0.05
|
0.05
|
0.05
|
|
Tungsten
|
the
rest
|
the
rest
|
the
rest
|
the
rest
|
|
Allowable
deviation at mg/200 mm (%)
|
±3
|
±2.5
|
±2
|
±1.5
|
|
Deviation
of single axis at weight (%)
|
1/2
of same gradational tolerance
|
1/2
of same gradational tolerance
|
1/2
of same gradational tolerance
|
1/2
of same gradational tolerance
|
|
Stranded
Tungsten Wire
|
|
Stranded
Tungsten Wire is uniformly silver-grayish in color.
It is made of first-grade tungsten bars with excellent
resistance to high temperature, evenly stranded
and free of mould stains and cracks. It has good
flexibility for processing purpose. When heated
to high temperature, it will not slack off nor deform.
Application:
Stranded
Tungsten Wire can be used for vacuum filmplating
or high-temperature heating elements. Particular
specification required by the customer can be satisfied
through consultation with us.
|
Ceriated
Tungsten Electrode
|
|
Ceriated
Tungsten is Tungsten doped by Cerium. It is a non-radioactive
material. It is known to be especially good for
DC welding with low amperage because it starts very
easily at low amps and usually requires about 10%
less amps to operate than thoriated material.
|
|
|
It
is very popular to be used for the welding of orbital
tube, pipe, very small parts, short welding cycles
and also where a specific number of welds are called
and then the electrode is to be replaced.
|
Lanthanated
Tungsten Electrode
|
|
The
lanthanated tungsten became very popular in the
circle of welding in the world soon after it was
developed because of its good welding performance
.The electric conductivity of Lanthanated Tungsten
is most closed to that of 2% Thoriated Tungsten.
Welders can easily replace Thoriated Tungsten Electrode
with Lanthanated tungsten Electrode at either AC
or DC and not have to make any welding program changes.
The radioactivity from Thoriated Tungsten can thus
be avoided. Another advantage of Lanthanated Tungsten
is being able to bear high current and having the
lowest burn-loss rate. Our WL Electrodes are state
patent products.
|
Zirconiated
Tungsten Electrode
|
|
Zirconiated
Tungsten has good performance in AC welding. It
balls up well in AC welding and has a more stable
arc than pure tungsten. Especially with excellent
performance in high load AC welding,it is not replacable
by any other electrodes. It also resists containation
well in AC welding. Zirconiated Tungsten is most
commonly used for AC welding of aluminum and magnesium
alloys.
Technical
Data
|
Trade
Mark
|
WL10
|
WL15
|
WL20
|
WC20
|
|
Added
impurity
|
La2O3
|
La2O3
|
La2O3
|
CeO2
|
|
Impurity
quantity %
|
0.8-1.2
|
1.3-1.7
|
1.8-2.2
|
1.8-2.2
|
|
Other
impurities %
|
<0.20
|
<0.20
|
<0.20
|
<0.20
|
|
Tungsten
|
the
rest
|
the
rest
|
the
rest
|
the
rest
|
|
Electric
discharged power
|
2.6-2.7
|
2.8-3.0
|
2.8-3.0
|
-
|
|
Color
sign Black
|
Black
|
Golden
Yellow
|
Sky
Blue
|
Grey
|
|
Pure
Tungsten, Yttriated Tungsten and Composite Electrodes
|
|
Pure
Tungsten Electrode: Suitable for welding under
alternating current.
Yttrium-Tungsten
Electrode: Mainly applied in military and aviation
industry with narrow arc beam, high compressing
strength, highest welding penetration at medium
and high current.
Composite
Electrodes: Their performance can be much improved
by adding two or more rare earth oxides which are
mutually complementary. The Composite Tungsten Electrode
developed by us has been listed in State Developing
Plan for new products.
|
Thoriated
Tungsten Electrode
|
|
Thoriated
Tungsten Electrode: As traditional products, WT
application area becomes more and more limited due
to radioactive contamination.
Technical
Data
|
|
|
|
