Dumet wire consists of a nickel-iron core in an oxygen-free-high-conductivity copper sheath. It is available in various surface finishes: electrically oxidised, borax coated, nickel plated, bare (uncoated).
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Dumet Wire: Copper-Clad Ni-Fe WireDumet wire consists of a nickel-iron core in an oxygen-free-high-conductivity copper sheath. It is available in various surface finishes: electrically oxidised, borax coated, nickel plated, bare (uncoated).
Borated surface finish Dumet is used in Lead-in-wires for lamps. Dumet forms a glass-to-metal seal while manufacturing these lamps. The oxidised Dumet is used in Lead-in-wires, diodes and capacitor slug leads application.
| Ni% | C% | Mn% | Si% | S% | P% | Fe% | |
|---|---|---|---|---|---|---|---|
| Core | 41 - 43 | 0.05 max | 1.0 max | 0.30 max | 0.02 max | 0.02 max | Rest |
| Copper Sheath: | 24 ± 2% & 26 ± 2% of the total weight 99.96% min. Copper with 0.00% Oxygen |
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Two other grades of are also available:
For Borated and Oxidised Dumet, colour is as per ASTM colour standard F-29-63T. The colours have been divided into three parts.
| Light | Medium | Dark |
|---|---|---|
| 0.5YR - 8.5R | 7.5R - 5.5R | 4.5R - 2.5R |
For Nickel-Plated Dumet wire, standard plating thickness is 2 microns and 4 microns.
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| Dumet Wire Production |
|---|
| Diameter (D) (mm) | Tolerance (mm) | Max out-of-roundness |
|---|---|---|
| 0.20 - 1.00 | ±0.010 | 0.010 |
| 1.00 - 2.00 | ±1% of D | 1% of D |
Available on many types of spools and drums depending on the customer requirements. Common spool in use has following dimensions (mm):
| Spool Type | Traverse | Bore | Flange | Tare |
|---|---|---|---|---|
| Dumet-SP | 52 mm | 48 mm | 100 mm | 60 gms |
Barrel/drum packaging and other standard DIN spools are also available upon request. Dumet spools are individually sealed with plastic film and put in an air-tight plastic container with activated desiccant.
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JLC Electromet Pvt. Ltd., Jaipur, India. All rights reserved.