Tungsten, atomic no.: 74, ?symbol as W, weight at 183.84,? pure tungsten is a steel-gray to tin-white metal. Tungsten has the highest melting point and lowest vapour pressure of all metals, and at temperatures over 1650°C has the highest tensile strength. The metal oxidises in air and must be protected at elevated temperatures. It has excellent corrosion resistance and is attacked only slightly by most mineral acids.
Products available
Product Name
Formula
Grade
Description
Applications
Ammonium Paratungstate
5(NH4)2O.12WO3.5H2O
APT-0
APT-1
APT-2
Free flowing white crystalline powder
For producing Tungsten Oxide
Blue Tungsten Oxide
WO2.8-2.97
99.95%
Free flowing dark blue crystalline powder
For producing Tungsten Powder
Tungsten Trioxide
WO3
99.95%
Free flowing light yellow crystal line powder.
Phosphors; fireproofing;
pigment
Standard Specifications
Ammonium Paratungstate is produced separating tungsten from its ore. Once the Ammonium Paratungstate is prepared, it is heated to its decomposition temperature, 600 °C. Left over is WO3, tungsten oxide. From there, the oxide is heated in an atmosphere of hydrogen, reducing the tungsten to elemental powder, leaving behind water vapor. From there, the tungsten powder can be fused into any number of things, from wire to bars to other shapes.
Remarks1: APT-0 is high purity matetial for special uses.
Remarks2: Material of 40-46micron is mainly used for producing tungsten bar for drawing wire.
Remarks3: Any partiqular reprirement to the products can be discussed.
Blue Tungsten Oxide is the material used for reducting tungsten powder, applied for manufacturing doped tungsten powder, tungsten bar, tungsten rod, tungsten wire and tungsten alloy etc.
Grade
GRADE-1
GRADE-2
WO2.8-2.97（%min）
99.95
99.95
Impurity Content
（%max）
AL
0.0005
0.001
FE
0.001
0.0015
S
0.0007
0.001
AS
0.001
0.002
P
0.0007
0.001
MO
0.002
0.0030
CA
0.001
0.0015
MG
0.0007
0.001
K
0.001
0.0015
NA
0.001
0.0015
SI
0.001
0.0015
CU
0.0003
0.001
MN
0.001
0.001
NI
0.0007
0.001
PB
0.0001
0.0005
BI
0.0001
0.0005
SN
0.0001
0.001
SB
0.0005
0.001
V
0.001
0.001
TI
0.001
0.001
CR
0.001
0.001
CO
0.001
0.001
CD
0.001
0.001
Fsss:10-18 UM
SCOTT DENSITY：2.0-2.6 G/CM3
LOI：0.5%MAX
CHLORIDE RESIDUE：0.01%MAX
Chemical Composition(%)：
W
Fe
Mo
other impurities
≥99.95
≤0.002
≤0.003
≤0.001
Note:K is not regarded as impurity.
Diameter Range：
CLASS IFICATION
minimal diameter
maximal diameter
TUNGSTEN ROD
swaged
3.0
16.0
straightened
0.40
3.0
GROUND TUNGSTEN ROD
1.0
14.0
Diameter Tolerance：
Diameter
Black tungsten rod
Ground tungsten rod
diameter tolerance
roundness
diameter tolerance
roundness
0.40<d≤0.80
±2
2
-
-
0.80<d≤3.0
±2
2
±0.03
0.03
3.0<d≤6.5
±2
2
±0.05
0.05
6.5<d≤14
±2
2
±0.08
0.08
Tungsten Trioxide is used for many purposes in everyday life. It is frequently used in industry to manufacture tungstates for x-ray screen phosphors and also for fireproofing fabrics. Due to its rich yellow color, WO3 is also used as a pigment in ceramics and paints.
In recent years, tungsten trioxide has been employed in the production of electrochromic windows, or smart windows. These windows are electrically switchable glass that change light transmission properties with an applied voltage[5]. This allows the user to tint their windows, changing the amount of heat or light passing through.
Chemical Composition(%)：
W
Fe
Mo
other impurities
≥99.95
≤0.002
≤0.003
≤0.001
Note:K is not regarded as impurity.
Diameter Range：
CLASS IFICATION
minimal diameter
maximal diameter
TUNGSTEN ROD
swaged
3.0
16.0
straightened
0.40
3.0
GROUND TUNGSTEN ROD
1.0
14.0
Diameter Tolerance：
Diameter
Black tungsten rod
Ground tungsten rod
diameter tolerance
roundness
diameter tolerance
roundness
0.40<d≤0.80
±2
2
-
-
0.80<d≤3.0
±2
2
±0.03
0.03
3.0<d≤6.5
±2
2
±0.05
0.05
6.5<d≤14
±2
2
±0.08
0.08
74
W
183.84
The standard specifications are only for reference, customers’ specification are welcomed. More detailed information including price, packing, MSDS sheet and lead time are all ready on request, please just leave
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Minor Metals
