High purity tungsten rods:
Grade: W1
Purity:99.95 min.
Application:making filament,setting rod at H.T.,electrode etc
High purity tungsten rods
Type & Application
Note : Quality is strictly as per GB4181-2003 national standard.
Chemical Composition:
|
Type
|
W
|
Fe
|
M0
|
Other element
|
|
WAL1
|
≥99.95%
|
≤0.001%
|
≤0.002%
|
≤0.001%
|
|
W1
|
≥99.95%
|
≤0.001%
|
≤0.002%
|
≤0.001%
|
Note : K is not regarded as impurity.
WAL1: K ≥ 75 PPM
Dimension and tolerance
|
Varity
|
Diameter Range
|
Diameter Tolerance
|
|
MIN
|
MAX
|
|
Black rod wroughted
|
≥3.0mm
|
±0.05mm
|
±0.10mm
|
|
Straightened rod
|
0.5 →3.0mm
|
±0.01mm
|
±0.01mm
|
|
Ground rod
|
≥0.8mm
|
±0.01mm
|
±0.05mm
|
