Welding or arc welding is a combination of different specialized techniques. and welding processes using shielding gas are preferred. Although shielded metal arc welding (SMAW), commonly referred to as Manual metal arc welding (MMA) can be used for welding applications that are not too large. It is a useful method for various thicknesses of metal. especially closed electrodes used to weld copper alloys using SMAW
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Shielding gasses commonly used for welding copper and copper alloys include argon and helium. or a mixture of both – for gas metal arc welding (GMAW), tungsten arc welding (GTAW) or plasma arc welding (PAW), especially for copper alloys.
Argon is generally preferred if copper or copper alloys are hand welded. and has a relatively low thermal conductivity or less than 3.3 mm (0.13 in.) thick, a mixture of helium or helium-argon alloy (75 percent) should be used for thin metal welding. or manual welding for thicker metals This combination is also applicable to thick metals. or copper with high thermal conductivity as well
Tips for Copper Arc Welding
- If possible, use reclining welding for copper arc welding.
- GTAW and SMAW can be used to connect in other positions. including overhead posture
- If vertical welding or head position using pulsed power and small diameter electrodes. GMAW may be required with some copper alloys.
- Thermal expansion of copper and its alloys as well as higher thermal conductivity As a result, the weld is more distorted than mild steel welding.
- To reduce distortion and distortion Welders need to focus on the warm-up process and tack welds. as well as carry out appropriate welding procedures
properties of copper and alloys to be careful when welding
Any welding process used to weld copper and copper alloys Importantly, it is the properties that distinguish copper welding from carbon steel welding, for example copper and copper alloys. When melted, it is very fluid and has
– high thermal conductivity
– high electrical conductivity
– High thermal expansion coefficient, which is about 50 percent higher than carbon steel.
– relatively low melting point
– Hot shorts result in some alloys becoming brittle at high temperatures.
– Strength resulting from extreme cold working
The melting point of copper and its alloys is highly variable. However, it is below the melting point of carbon steel of 1,000 °F or 538 °C. In addition, copper does not exhibit the same heat color seen when welding steel. and when molten, there will be more fluidity.
