RWMA Group A
Cu alloy
CuCr and CuCrZr| Content (%wt.) | Density (g/cm3) | Conductivity (%IACS) | Hardness (HRB) | RWMA |
| Cr: 0.6-1% | 8.9 | 70 | 85 | Class 2 |
| Cr: 0.5-1.5%, Zr: 0.05-0.25%, Cu: balance | 8.9 | 80 | 80 | Class 2 |
Production process
Vacuum casting - hot forging - solid solution processing - cold forging, heat treatment - final processing
Application
Parts for resistance welding equipment, electrode rods, shaft and packing materials, or as moulds for large convex welding machines, welding electrodes, seam welding wheels, electrode holders, plastic mould parts.
Nickel Silicon Copper
| Composition | Density (g/cm³) | Conductivity (%IACS) | Hardness (HRB) | RWMA |
| Si: 0.60-1.1% Ni: 2.4-3.4% Cu: balance | 8.83 | 40 | 90 | Class 3 |
Vacuum casting - hot forging - solid solution processing - cold forging, heat treatment - final processing
Application
Silicon bronze electrodes, parts for resistance welding equipment, electrode rods, shaft and packing material, or as moulds for large convex welding machines, welding electrodes, seam welding wheels, electrode holders, plastic mould parts.
CuCo2Be
| Content (%wt.) | Density (g/cm³) | Conductivity (%IACS) | Hardness (HRB) | RWMA |
| Be: 0.40-0.70% Co: 2.40-2.70% Cu: balance | 8.83 | 45 | 95 | Class 3 |
Vacuum casting - hot forging - solid solution processing - cold forging, heat treatment - final processing
Application
Resistance welding electrodes, parts for resistance welding equipment, electrode rods, shaft and packing materials, or as moulds for large convex welding machines, welding electrodes, seam welding wheels, electrode holders, plastic mould parts.
RWMA Group B
Refractory Metal
Tungsten copper
| Composition | Density (g/cm³) | Hardness (HRB) | Conductivity (%IACS) | RWMA |
| W50Cu50 | 11.9 | 65 | 54 | |
| W55Cu45 | 12.5 | 70 | 49 | Class 10 |
| W70Cu30 | 14.1 | 82 | 42 | |
| W75Cu25 | 14.5 | 90 | 38 | Class 11 |
| W80Cu20 | 15.2 | 98 | 34 | Class 12 |
| W85Cu15 | 15.9 | 240HB | 30 | |
| W90Cu10 | 16.75 | 260HB | 27 |
Stainless steel, steel net, barbed wire, copper strip, aluminum tape, silver cord
Tungsten
| Composite (%wt.) | Density (g/cm3) | Hardness (HRC) | Electrical Conductivity (%IACS) | Class | RWMA | Comparison |
| W ≥99.95 | 19.3 | 36 | 30 | 13 | 13.743 | High temperature resistance |
| W-Ce (CeO2:2%) | 19.2 | Low electric discharge power, fine arc-starting performance, excellent arc erosion resistance, longer service life | ||||
| W-La (La2O3: 1-2%) | 19.2 | Low electric discharge power, easy for machining |
Powder mixture - CIP - sintering - forging - final processing
Application
Tungsten electrode, tungsten-faced electrode used for plasma discharge electrode, fusion electrode, micro TIG welding electrodes and resistance welding electrodes. Used for welding copper wires, enameled wire, copper lug, copper foil.
Molybdenum
| Comparison (wt.%) | Density (g/cm³) | Hardness (HRB) | Electrical Conductivity (%IACS) | RWMA | Comparison |
| Mo ≥ 99.95 | 10.2 | 90 HRB | 30 | 14.423 | Superior electrical and thermal conductivity |
| TZM (Ti: 0.5%, Zr: 0.08%, C: 0.02%) | 10.17 | High thermal and creep resistance | |||
| Mola (La2O3: 0.1 -1.8%) | 10.19 |
Powder mixture - CIP - sintering - forging - final processing
Application
Molybdenum electrode, molybdenum-faced electrode, micro TIG welding electrodes, resistance welding electrodes, used for welding copper wire, enameled wire, copper lug, copper foil, PCB circuit board wire and stainless steel.
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