JLC Electromet
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Ni47 Cr6 Fe AlloyDumet 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 | Cr | Mn | Si | C | S | Al | Fe |
|---|---|---|---|---|---|---|---|
| 46 Min | 5.5 - 6.5 | 1.0 max | 0.30 max | 0.05 max | 0.02 max | 0.20 Max | Balance |
| Co-efficient of Linear expansion (20 - 400°C) |
Electrical Resistivity Microhm-cm |
Tensile Strength (annealed) |
Elongation upon fracture |
|---|---|---|---|
| 9.5 - 10.5 x 10-6/°C | 6 to 9 | 40-60 Kg/mm2 | 20 min |
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.
| Diameter (D) (mm) | Tolerance (mm) | Max out-of-roundness |
|---|---|---|
| 0.20 - 1.0 | ±0.010 | 0.010 |
| 1.0 - 2.0 | ±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 (mm) | Bore (mm) | Flange (mm) | Tare (gm.) |
|---|---|---|---|---|
| Dumet-SP | 52 | 48 | 100 | 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.