KOREA TUNGSTEN CO.,LTD

Tungsten Electrode (W · WCu)

Tungsten and molybdenum boats and crucibles for vacuum deposition and high-temperature melting. They are used where the vessel must not react with molten metal, and are built to your required shape and capacity.

3,422 °CMelting point of tungstenThe basis for withstanding the arc

W 70~90 %Composition choiceThe balance of conductivity and arc resistance

99.95 % +Material purityA high-purity tungsten matrix

To drawingShape machiningTip · rod · contact

3,422 °CMelting point of tungstenThe basis for withstanding the arc

W 70~90 %Composition choiceThe balance of conductivity and arc resistance

99.95 % +Material purityA high-purity tungsten matrix

To drawingShape machiningTip · rod · contact

Applied parts

Used as the evaporation source in vacuum coaters, the melting crucible in high-temperature furnaces and the vessel in crystal growth equipment. Material and shape are designed around what it will hold and at what temperature.

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MaterialTungsten (W) · Tungsten-copper (WCu)

CompositionW 70 – 90 %

ProductionPrecision machined after infiltration

GeometryMachined to drawing

SurfaceGround or mirror finished

Service environmentHigh current · arcing

Composition, geometry and surface are set by the current and arc conditions. Tell us the service conditions and we will confirm and reply.

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MaterialTungsten (W) · Tungsten-copper (WCu)

CompositionW 70 – 90 %

ProductionPrecision machined after infiltration

GeometryMachined to drawing

SurfaceGround or mirror finished

Service environmentHigh current · arcing

Composition, geometry and surface are set by the current and arc conditions. Tell us the service conditions and we will confirm and reply.

No products added

KEY FEATURES

Composition sets the electrode's life

Conductivity and arc resistance are traded against each other.

The higher the tungsten proportion, the better it withstands the arc; the more copper, the better it conducts.

Arc and wear resistance

Arc Resistance

The tungsten skeleton withstands the arc heat, reducing electrode wear and distortion.

High electrical conductivity

Electrical Conductivity

The infiltrated copper carries the current and lowers heating. Conductivity is set through the composition.

Dimensional stability

Dimensional Stability

The geometry holds through repeated current cycles, keeping weld quality and discharge gap consistent.

Character by composition

W 90 · Cu 1090

W 80 · Cu 2080

W 70 · Cu 3070

Tungsten proportion %. The higher the figure, the better it withstands the arc and the lower the conductivity.

Why compositions differ

In the same electrode, a welder needs conductivity first; a switchgear contact needs arc resistance first.

Surface after machining

A rough contact face produces local arcing and faster wear. The polishing grade is set alongside.

KEY FEATURES

Composition sets the electrode's life

Conductivity and arc resistance are traded against each other.

The higher the tungsten proportion, the better it withstands the arc; the more copper, the better it conducts.

Arc and wear resistance

Arc Resistance

The tungsten skeleton withstands the arc heat, reducing electrode wear and distortion.

High electrical conductivity

Electrical Conductivity

The infiltrated copper carries the current and lowers heating. Conductivity is set through the composition.

Dimensional stability

Dimensional Stability

The geometry holds through repeated current cycles, keeping weld quality and discharge gap consistent.

Character by composition

W 90 · Cu 1090

W 80 · Cu 2080

W 70 · Cu 3070

Tungsten proportion %. The higher the figure, the better it withstands the arc and the lower the conductivity.

Why compositions differ

In the same electrode, a welder needs conductivity first; a switchgear contact needs arc resistance first.

Surface after machining

A rough contact face produces local arcing and faster wear. The polishing grade is set alongside.

3,422°CMelting point of tungsten

70 – 90%Tungsten proportion

99.95% +Material purity

3,422°CMelting point of tungsten

70 – 90%Tungsten proportion

99.95% +Material purity

DESIGN PRECISION

Composition set to the service conditions

In an electrode, composition and geometry are what distinguish the product.

In the same geometry, changing the composition changes the electrode life and the heating.

W 70–90%

Composition choice

The tungsten proportion is set in light of the current and arc conditions.

Drawingbasis

Machined geometry

Tip angle and contact face are machined as drawn.

Polishinggrade

Surface condition

The grade is raised to reduce contact resistance and wear.

We do not pick a specification, we develop it with you. (Give us the current and arc conditions and the mounting specification, and we will work out the composition with you.)

DESIGN PRECISION

Composition set to the service conditions

In an electrode, composition and geometry are what distinguish the product.

In the same geometry, changing the composition changes the electrode life and the heating.

W 70–90%

Composition choice

The tungsten proportion is set in light of the current and arc conditions.

Drawingbasis

Machined geometry

Tip angle and contact face are machined as drawn.

Polishinggrade

Surface condition

The grade is raised to reduce contact resistance and wear.

We do not pick a specification, we develop it with you. (Give us the current and arc conditions and the mounting specification, and we will work out the composition with you.)

APPLICATIONS

Applications

The fields where electrodes are used. Composition and geometry differ by application.

Resistance weldingUsed as the electrode tip in spot and projection welding.

EDMUsed as form electrodes and fine-hole electrodes in EDM.

High-voltage switchingUsed as arc contacts in breakers and switchgear.

Electron beam · ion sourcesUsed as electrode parts carrying high current.

Discharge lampsUsed as electrodes in high-pressure discharge lamps.

Research equipmentUsed as electrodes in arc and plasma test apparatus.

Resistance weldingEDMswitchgear contactselectron beamdischarge lamps

APPLICATIONS

Applications

The fields where electrodes are used. Composition and geometry differ by application.

Resistance weldingUsed as the electrode tip in spot and projection welding.

EDMUsed as form electrodes and fine-hole electrodes in EDM.

High-voltage switchingUsed as arc contacts in breakers and switchgear.

Electron beam · ion sourcesUsed as electrode parts carrying high current.

Discharge lampsUsed as electrodes in high-pressure discharge lamps.

Research equipmentUsed as electrodes in arc and plasma test apparatus.

Resistance weldingEDMswitchgear contactselectron beamdischarge lamps

LEAD TIME

Fabrication and Lead Time

This product is made to your drawing. Here is the process, step by step.

STEP 01

Drawing received

Send us the electrode geometry, tungsten content, end angle and service current.

Reply within 1 day

STEP 02

Specification review

We review the composition and machining method and propose a surface roughness.

2 – 4 days

STEP 03

Machining · bonding

Tip bonding, rod grinding and block slot machining are carried out as drawn.

By agreement, depending on the production schedule

STEP 04

Inspection · delivery

Dimensions and surface roughness are measured, and the part ships with a test report. Repeat orders to the same drawing skip the review stage.

By agreement, depending on the production schedule

Minimum quantity

From small quantities

Varies with geometry and composition.

Standard lead time

About 2 – 3 weeks

From drawing approval. A bonding stage adds to the period.

Supplied with it

Test report

Dimensional and surface roughness measurements are sent with the delivery.

LEAD TIME

Fabrication and Lead Time

This product is made to your drawing. Here is the process, step by step.

STEP 01

Drawing received

Send us the electrode geometry, tungsten content, end angle and service current.

Reply within 1 day

STEP 02

Specification review

We review the composition and machining method and propose a surface roughness.

2 – 4 days

STEP 03

Machining · bonding

Tip bonding, rod grinding and block slot machining are carried out as drawn.

By agreement, depending on the production schedule

STEP 04

Inspection · delivery

Dimensions and surface roughness are measured, and the part ships with a test report. Repeat orders to the same drawing skip the review stage.

By agreement, depending on the production schedule

Minimum quantity

From small quantities

Varies with geometry and composition.

Standard lead time

About 2 – 3 weeks

From drawing approval. A bonding stage adds to the period.

Supplied with it

Test report

Dimensional and surface roughness measurements are sent with the delivery.

HANDLING

Handling precautions

These apply to refractory metals in general. Service life depends heavily on how the parts are handled.

Do not touch the parts with bare hands after unpacking. Oil from fingerprints carbonizes at high temperature and becomes a contaminant.

The material is weak against impact and bending. Tungsten is brittle at room temperature and can crack if dropped.

Do not heat above 500°C in air; oxidation accelerates sharply. Always use the parts in a vacuum or an inert atmosphere.

Avoid rapid heating and cooling. On first use, we recommend pre-heating (aging) at low current.

Store indoors in a dry place and keep the moisture-barrier packaging intact.

If your installation or operating conditions are unusual, our engineers will review them in advance. Send a drawing or your process conditions and we will start by selecting the right material with you.