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Copper Tungsten Welding Rod is an alloy composed of tungsten and copper. The copper content of common alloy is 10%~50%. The alloy is made of powder metallurgy and has good conductivity, thermal conductivity, high temperature strength and certain plasticity. At very high temperatures, such as above 3000 ℃, the copper in the alloy will liquefy and evaporate, absorb a lot of heat, and reduce the surface temperature of the material.
| Code No. | Chemical Composition % | Mechanical properties | ||||||
| CU | Impurity | W | Density (g/cm3 ) | Hardness HB | RES( cm) | Conductivity IACS/ % | TRS/ Mpa | |
| CuW(50) | 50±2.0 | 0.5 | Balance | 11.85 | 115 | 3.2 | 54 | |
| CuW(55) | 45± 2.0 | 0.5 | Balance | 12.30 | 125 | 3.5 | 49 | |
| CuW(60) | 40±2.0 | 0.5 | Balance | 12.75 | 140 | 3.7 | 47 | |
| CuW(65) | 35±2.0 | 0.5 | Balance | 13.30 | 155 | 3.9 | 44 | |
| CuW(70) | 30±2.0 | 0.5 | Balance | 13.80 | 175 | 4.1 | 42 | 790 |
| CuW(75) | 25±2.0 | 0.5 | Balance | 14.50 | 195 | 4.5 | 38 | 885 |
| CuW(80) | 20±2.0 | 0.5 | Balance | 15.15 | 220 | 5.0 | 34 | 980 |
| CuW(85) | 15±2.0 | 0.5 | Balance | 15.90 | 240 | 5.7 | 30 | 1080 |
| CuW(90) | 10±2.0 | 0.5 | Balance | 16.75 | 260 | 6.5 | 27 | 1160 |
Tungsten-copper alloy (W=80 Cu=20)
Conductivity % IACS 42 or higher
Density = 14 g/cm3
Softening temperature ≥700 ℃
Tensile strength ≥66Mpa
Hardness is 184 hv or higher
Tungsten-copper alloy can withstand high temperature and high stress of nearly 2000 degrees. It has the characteristics of high melting point, high hardness, burn resistance and good adhesion resistance. The electrocorrosion products have high surface finish, high precision and low loss.