Zhuzhou Jiabang Refractory Metal Co., Ltd
Zhuzhou Jiabang Refractory Metal Co., Ltd
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Good quality Copper tungsten sheet W75Cu25
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
Heat Sinks
The CuW75 tungsten copper alloy is used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a tungsten copper material, it's a composite, so both the thermal advantages of copper and the very low expansion characteristics of tungsten can be utilized.
The combination of tungsten & copper materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of tungsten copper's thermal conductivity and expansion characteristics, Tungsten copper alloy works well in densely packed circuits.
Tungsten CopperTechnical 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 |