FOTMA CuW75 Tungsten Copper Alloy/Tungsten Copper Alloy Electrical Contacts Customized Arcing Contacts / Arc Runner

The high Electrical & thermal conductivity of copper are combined with the arc-resistant & non-welding properties of tungsten or their carbides to form an extensive series of compositions each designed to give the best performance for your particular application. These materials are used for such heavy duty contact applications as:

Circuit breakers, air & oil immersed
Arcing tips or arc runners
Make & break contacts
Heavy duty conductors, relays & switches.
  
Advantages of Copper Tungsten Contacts:
 
The high electrical and thermal conductivity of tungsten copper alloy allows a cool, effective transfer of power, while the excellent arc-resistance properties of tungsten copper minimize arc erosion and transfer problems. These characteristics can be varied by composition more silver or copper yields higher electrical and thermal conductivity, while a higher refractory metal content results in superior arc erosion properties. We offer a variety of composites to meet your demands. Regardless of the environment (oil-filled devices, air and gas circuit breakers, contactors, high voltage switch gear) or the application (arcing contacts and plates, arc runners, current carrying members and blade facings), you won't be disappointed in electrical contacts made from our copper tungsten composites.
 
Specifications of WCu Alloys:

 

GRADE	CHEMICAL CONTENT			DENSITY	HARDNESS
	Cu	IMPURITY ≤	W	g/cm3  ≥	HB Kgf/mm2 ≥	μΩ.cm  ≤	%  ≥	MPa ≥
W50/Cu50	50±2.0	0.5	BAL	11.85	115	3.2	54	--
W55/Cu45	45±2.0	0.5	BAL	12.3	125	3.5	49	--
W60/Cu40	40±2.0	0.5	BAL	12.75	140	3.7	47	--
W65/Cu35	35±2.0	0.5	BAL	13.3	155	3.9	44	--
W70/Cu30	30±2.0	0.5	BAL	13.8	175	4.1	42	790
W75/Cu25	25±2.0	0.5	BAL	14.5	195	4.5	38	885
W80/Cu20	20±2.0	0.5	BAL	15.15	220	5	34	980
W85/Cu15	15±2.0	0.5	BAL	15.9	240	5.7	30	1080
W90/Cu10	10±2.0	0.5	BAL	16.75	260	6.5	27	1160