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pecification of internal welding wire: 30* outer diameter 6mm* inner hole 1.1mm (heating length 20mm) External wire specification: 34* outer diameter 6mm* inner hole 1.3mm (heating length 20mm) Lead wire: 70Ф0.6mm nickel wire. Resistors: 1.8-2 ohms (other resistors can be customized) Voltage: 12V/24V Power: 100/200W Performance and characteristics 1. The structure is simple, and the shape, size and resistance power can be produced according to customer requirements. 2. Good thermal uniformity and high power density: ≥ 45 W/cm2; 3. Resistance-temperature variation is linear, and temperature can be easily controlled by controlling resistance or voltage; 4. The temperature rises rapidly, ranging from 5 seconds to 300℃ with a maximum of 900℃ Good insulation performance: safe and uncharged surface, withstand voltage 4500V/1S, no breakdown, leakage current < 0.5mA；; 5, long service life, long-term use without power attenuation; 6. The heating sheet is resistant to acid and alkali and other corrosive substances; 7. Environmental protection: No harmful substances such as lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl, polybrominated diphenyl ether, etc., which fully meet the environmental protection requirements of the EU.