Tungsten Copper Composite

WM0136 Tungsten Copper Composite

Catalog No.WM0136
MaterialCuW
Density11.85-16.75g/cc
Size>2mm diameter x 12"Length for Rod
PurityW 50-90%
SurfaceGrinding or Finish Turning

Tungsten copper refers to an alloy composed of tungsten (usually 50% to 90%) and copper (usually 10% to 50%.) SMC is a trustworthy supplier of high-quality tungsten copper.

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INQUIRY

Tungsten-based composites are strong refractory metal materials manufactured by a strictly controlled process involving pressing, sintering, and infiltrating with copper or silver. They are highly resistant to heat, electric arc, wear and deformation at high-temperature welding, flash butt and spot welding. They also have excellent electrical and thermal conductivity. The properties of Tungsten composites are related to the copper/silver-to-Tungsten ratio. If the Tungsten content improves, the electric arc and wear resistance will increase while the thermal and electrical conductivity, on the contrary, reduce.

Due to their unique properties, Tungsten based composites are widely used where the combination of good electrical and/or thermal conductivity and low thermal deformation is necessary, for example

In electric resistance welding as electrical contacts or heat sinks.
In electrodes for electrical discharge machining (EDM) and electrochemical machining (ECM).

Physical and Mechanical Properties:

Composites	Nominal Composition (% Weight)	Density (g/cm³, ≥)	Electrical Resistivity (20°C, µΩ·cm, ≤)	Electrical conductivity (IACS%, ≥)	Hardness(≥) Brinell Hardness		Bending Strength
Composites	Nominal Composition (% Weight)	Density (g/cm³, ≥)	Electrical Resistivity (20°C, µΩ·cm, ≤)	Electrical conductivity (IACS%, ≥)	MPa	Kgf/mm²	MPa	Kgf/mm²
CuW50	50% Copper 50% Tungsten	11.85	3.2	54	1128	115	---	---
CuW55	45% Copper 55% Tungsten	12.3	3.5	49	1226	125	---	---
CuW60	40% Copper 60% Tungsten	12.75	3.7	47	1373	140	---	---
CuW65	35% Copper 65% Tungsten	13.3	3.9	44	1520	155	---	---
CuW70	30% Copper 70% Tungsten	13.8	4.1	42	1716	175	667	68
CuW75	25% Copper 75% Tungsten	14.5	4.5	38	1912	195	706	72
CuW80	20% Copper 80% Tungsten	15.15	5.0	34	2158	220	736	75
CuW85	15% Copper 85% Tungsten	15.9	5.7	30	2354	240	765	78
CuW90	10% Copper 90% Tungsten	16.75	6.5	27	2550	260	804	82

CuW50 and CuW55 have the lowest Tungsten contents. They are both good switching and contact materials for oil filled devices. CuW55 is also used for arcing contacts in oil circuit breakers and arcing edges of selectors and switchblades in transformer tap changers.

CuW65 and CuW70 are used as contact materials in severe arcing applications including gas, oil and some air circuit breakers. They are also used for arcing edges on selectors and reversing switch blades.

CuW75 and CuW80 are used as contact materials under extreme arcing conditions. Applications include arcing contacts in gas and oil circuit breakers, contactors and transformer tap changers, arcing plates and arc runners in power switching equipment.

CuW85 and CuW90 have the highest Tungsten content. They are used as contact materials where resistance to contact welding, sticking and arc erosion are critical. They also provide satisfactory heat and current interruption capabilities. Typical applications are power vacuum switches and high power spark gap electrodes, etc.

Tungsten Copper Composite Specifications:

Type	Length (mm)	Width (mm)	Thickness (mm)	Diameter (mm)
Tungsten-Copper rod	2 ~ 300	---	---	2 ~ 320
Tungsten-Copper plate	10 ~ 300	10 ~ 300	2 ~ 200	---
other types	cube, ring, block, Tungsten-Copper electrode and other customized shaped products