Tungsten, molybdenum and heatspreader materials

Processed products, etc.

Tungsten products

Tungsten wires and rods
●Product selection guide

◎Most suitable  ○Suitable  △Unsuitable

Application Non-
sag
Shock
resistance
Machin-
ability
Discharge
ability
Discharge
consumption
resistance
Wear
resistance
Corrosion
resistance
(VM)
AW Filaments for halogen lamps (thinner),
grids, supports, heaters
and corona wires
AX Filaments for ultrahigh temperature
halogen lamps (thicker)
EX Vacuum evaporation,
heaters for high-temperature furnaces,
print wires for printers, supports,
discharge electrodes and probe pins
DW Electrodes, EDM wires and filaments
for thermionic emission
CY
(PFW)
Structural materials and
heaters for furnaces
EP Discharge electrodes,
structural materials and
pressure welded electrodes
KT Discharge electrodes and
structural materials
4N-W
5N-W
Electrodes and heaters
AW
This material is highly resistant to high-temperature deformation, blackening and shocks, contains little impure gas and has a long life.
AX
Compared with conventional materials, the recrystallization temperature is 50 to 200℃ higher, and the dope holes are smaller. Moreover, the length of the crystal structure after recrystallization is 3 to 4 times longer, and the non-sag property has been substantially improved.
EX
This material is the world’s top-class long life filament material, contains little impure gas, excels in high-temperature deformation resistance and is corrosion resistant to evaporated metals such as Al, Ni and Cr.
DW
This is a long-life tungsten material that facilities thermionic generation and prevents grain growth and intergranular fracture at thermionic emission temperatures. Coil processing, end processing and assembly processing are also available upon request.
CY(PFW)
This is the most common pure tungsten material and has such features as being highly machinable, excelling in corrosion resistance and containing little impure gas.
EP, KT
The resistance to loss of current, through electrical discharge, can substantially be increased by fine dispersion of grains.
4N-W, 5N-W
Tungsten of highest purity attainable in the world.
Purity: 4N-W 99.99% or over, 5N-W 99.999% or over
●Standard specifications of tungsten wires
Diameter range
(mm)
Material Representative spec
AW
AX
CY
EX
4N-W
5N-W
Finish Tolerance
Diameter
Tolerance
MG
Black CC Electrolytic Straight
~0.0129           ±0.005mm ±4%
0.013~0.029         ±0.005mm ±3%
0.03~0.19   ±0.005mm ±2%
0.20~0.39   ±0.005mm ±2%
0.40~0.49   ±0.01mm ±2%
0.50~0.59   ±0.02mm  
0.60~0.79 ±0.03mm  
0.80~0.99   ±0.03mm  
1.0~2.9       ±0.05mm  
3.0~3.9           ±0.1mm  
●Standard specifications of tungsten rods
Diameter range
(mm)
Material Representative spec
AW
AX
CY
PFW
4N-W
5N-W
EX EP
KT
Finish Tolerance
Diameter
Finish
grinding
※1
Tolerance
Diameter
Black Electrolytic CC
0.03~0.19           ±0.005mm    
0.20~0.39       ±0.005mm    
0.40~0.49       ±0.01mm    
0.50~0.59       ±0.02mm    
0.60~0.79     ±0.03mm    
0.80~0.99     ±0.03mm ±0.03mm
1.0~2.9       ±0.05mm ±0.03mm
3.0~3.9       ±0.15mm ±0.03mm
4.0~4.9       ±0.15mm ±0.03mm
5.0~6.3       ±0.2mm ±0.05mm
6.4~11.9       ±0.3mm ±0.1mm
12.0~14.9         ±0.4mm ±0.1mm
15.0~20.9         ±0.5mm ±0.15mm
21.0~40.0             ±0.2mm

※1 Finish grinding: Centerless grinding for wires and rods of 20mm or less in diameter and belt grinding for
wires and rods larger than 20mm in diameter.

●Manufacturing range of length of standard tungsten rods
Diameter(mm) 50 45 41 36 31 25 21 16 11 8 6 5
Length MAX 450 600 800 1000 1400 1500 1500 2000 3300 8000 12000 17000
Standard 230 300 400 500 700 850 1100 1200 1000 1100 1000 1000

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