Zhuzhou Jiabang Refractory Metal Co., Ltd |
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Reliable quality copper tungsten alloy Electrical contact W70Cu30
Tungsten copper alloys are used where the combination of high heat resistance, high electrical and/or thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. WCualloys are also used in electrodes for electrical discharge machining and electrochemical machining.
Advantages
Higer thermal conductivity
Low thermal expansion
High arc resistance combined with good electrical conductivity
Applications
1.Resistance Welding
The high physical and mechanical properties, as well as the thermal
and electrical conductivity, of refractory metal composites make
tungsten copper alloy very suitable for die inserts and electrode
facings, flash and butt welding dies, and hot upsetting. They can
also solve heat balance problems.
2.Electrical Contacts
Electrical contacts are subjected to extreme mechanical and thermal
stresses during operation. For fractions of a second, temperatures
rise to several thousand degrees as a result of the arcing. Our tungsten copper materials are used owing to their unique physical properties.
3.EDM and ECM
Tungsten copper alloys are used worldwide for EDM (Electrical Discharge Machining) and
ECM (Electrochemical Machining) electrodes. All material is
manufactured by the press, sinter, and infiltrate process. Virgin
tungsten powders are used, resulting in a consistent homogeneous
material giving high and even burning rates. Tungsten copper is
used in plunger/sinker applications where intricate definition is
required, especially in tungsten carbide.
4. Electrodes for Spark Erosion
Our WCu electrodes are best suitable for EDM machining of those
materials.
Types of product: rods, tubes and plates
Copper tungsten alloyTechnical Data
Grade No | Chemical | Composition % | Density | Hardness | Resistivity | IACS | Bending Strength | |
Cu | Impurity | Wolfram | 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 | 12.3 | 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 | 13.3 | 155 | 3.9 | 44 | |
W70/Cu30 | 30±2.0 | 0.5 | Balance | 13.8 | 175 | 4.1 | 42 | 790 |
W75/Cu25 | 25±2.0 | 0.5 | Balance | 14.5 | 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 | 15.9 | 240 | 5.7 | 30 | 1080 |
W90/Cu10 | 10±2.0 | 0.5 | Balance | 16.75 | 260 | 6.5 | 27 | 1160 |