Which of the following is not a property of tungsten used in GTAW electrodes?

Tungsten is known for its unique properties that make it an ideal choice for electrodes in Gas Tungsten Arc Welding (GTAW). One of its defining features is its high melting point, which allows it to withstand the intense heat produced during the welding process without melting or deforming. Additionally, tungsten has excellent heat conductivity, facilitating efficient heat transfer to the workpiece, enhancing the welding process's effectiveness.

Another critical property of tungsten is its low electrical resistance, which ensures efficient current flow through the electrode, providing a stable arc during welding.

Low mechanical strength is not typically associated with tungsten. In fact, tungsten possesses relatively high mechanical strength when compared to many other materials, making it durable and suitable for high-temperature applications, such as welding. This strength contributes to maintaining the electrode's integrity under stress and during prolonged use.

Therefore, identifying low mechanical strength as a property of tungsten is incorrect, as the material's strength contributes positively to its performance as an electrode in GTAW.