WCu composites are offered with 10~50wt.% Cu.

Advantages:
  *  High arc resistance combined with good electrical conductivity
  *  High thermal conductiveity　
  *  Low thermal expansion
  
Applications:
  *  Arcing contacts and vaccum contacts in high and medium voltage breakers or vaccum interruptors 
  *  Electrodes in electric spark erosion cutting machines
  *  Heat sinks as passive cooling elements of electronic devices. 
  *  Electrodes for Resistance Welding

Product Standard:   GB/T 8320-2003

Chemical Composition,Physical & Mechanical Properties of Tungsten-Copper Composites

Class	Chemical Composition(wt %)			Density	Hardness	Resistivity	IACS	Bending Strength
	Cu	Total Impurities ≤	W	g/cm3 ≥	HB Kgf/mm2 ≥	μΩ.cm ≤	% ≥	MPa ≥
W50/Cu50	50±2.0	0.5	balance	11.85	115	3.2	54	--
W55/Cu45	45±2.0	0.5	balance	12.30	125	3.5	49	--
W60/Cu40	40±2.0	0.5	balance	12.75	140	3.7	47	--
W65/Cu35	35±2.0	0.5	balance	13.30	155	3.9	44	--
W70/Cu30	30±2.0	0.5	balance	13.80	175	4.1	42	790
W75/Cu25	25±2.0	0.5	balance	14.50	195	4.5	38	885
W80/Cu20	20±2.0	0.5	balance	15.15	220	5.0	34	980
W85/Cu15	15±2.0	0.5	balance	15.90	240	5.7	30	1080
W90/Cu10	10±2.0	0.5	balance	16.75	260	6.5	27	1160