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Tungsten Rod

Tungsten rods are mainly used to manufacture various emission cathodes, high-temperature shaping rods, brackets, lead wires, printing needles, various electrodes, quartz melting furnace heaters, etc

1、Performance characteristics

ClassificationGradesag resistanceSeismic performanceDischarge performanceProcessing performanceSpecification range(mm)purpose
纯钨
Pure tungsten		HW11△△◎●0.1~60Heating materials for furnace body, non radiative welding electrodes, contact materials, etc
掺杂钨
Doped tungsten		HW31◎⃝⃝●0.005~17Fluorescent lamps, energy-saving lamp filaments, HID electrodes, etc
HW41⃝△⃝●0.1~60Heating element for vacuum coating, heating material for furnace body, HID electrode, bracket, guide wire, etc
HW42⃝⃝⃝◎0.1~17Heating element, bracket, guide wire, etc. for vacuum coating
HW61◎◎⃝◎0.005~17Filaments, brackets, printing needles for incandescent lamps, fluorescent lamps, energy-saving lamps
HW66●●⃝◎0.005~17New types of filaments for energy-saving lamps, etc
HW91●◎⃝◎0.005~17Halogen lamps, high color temperature lamps, automotive lamp filaments, etc
HW99●●⃝◎0.005~17Long lifespan and high luminous efficiency halogen lamp filaments, etc
铼钨
Rhenium tungsten

HWRe

30

◎●⃝⃝0.02~3.0Electronic tubes, cathode ray tube filaments

HWRe

50

◎●⃝⃝0.02~3.0Thermocouples, electronic tubes, cathode ray tube filaments, etc

HWRe

260

◎●⃝⃝0.05~3.0Thermocouples, electronic tube devices, etc
Remarks： ●Best   ◎Very Good   ⃝Good   △Poor

2、Dimensional tolerance

Surface stateRotary forgingPullingChemical cleaning/
electrolytic polishing		Polishinglength tolerance
（mm）
SizeDiameter toleranceEllipticityDiameter toleranceEllipticityDiameter toleranceEllipticityDiameter toleranceEllipticity
0.2≤d<0.5

±0.010.01±0.010.01

L<100±1.0

100≤L<300±1.5

300≤L<500±2.0

500≤L<1000±2.5

1000≤L<2000±5.0
0.5≤d<0.8

±0.020.02±0.020.02±0.010.01
0.8≤d<1.0

±0.020.02±0.020.02±0.020.02
1.0≤d<1.8

±0.030.03±0.030.03±0.020.02
1.8≤d<3.0

±0.050.05±0.050.05±0.030.03
3.0≤d<5.5±0.1
±0.100.1±0.100.1±0.050.05
5.5≤d<9.0±0.2




±0.080.08
9.0≤d<13.0±0.3




±0.100.1
13.0≤d<18.0±0.4




一

Note: Tungsten rods (rods) with a diameter of d<0.2mm or d ≥ 100mm can be customized according to customer requirements;
Ellipticity: dmax dmin

3、Chemical element

Powder/
Chemical Elements		WOFeMoKAlSiOthers
Pure tungsten≥99.90≤0.08≤0.005≤0.005≤0.003≤0.002≤0.002≤0.001
Doped tungsten≥99.40≤0.50≤0.002≤0.0030.006~0.0160.003~0.0100.015~0.035≤0.001
Note: The composition of K, Al, and Si elements in doped tungsten powder can be provided according to customer requirements

Grade/
Chemical Elements		HW99HW91HW66HW61HW31HW41HW42HW11HWRe
tungsten≥99.90≥99.95≥99.90≥99.95≥99.95≥99.95≥99.95≥99.98Rest
rhenium////////0.05~50
potassium0.0075~0.0100.0075~0.0100.0070~0.0090.0070~0.00850.0060~0.0080.0040~0.0070.0060~0.010≤0.002/
iron≤0.015≤0.015≤0.015≤0.015≤0.015≤0.002≤0.002≤0.002≤0.002
molybdenum≤0.003≤0.003≤0.003≤0.003≤0.003≤0.001≤0.001≤0.001≤0.005
Other elements≤0.001≤0.001≤0.001≤0.001≤0.001≤0.002≤0.002≤0.002≤0.002
total impurities≤0.100≤0.050≤0.100≤0.050≤0.050≤0.050≤0.050≤0.050≤0.002


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