A pure tungsten electrode (AWS EWP) is a non-alloyed electrode (≥99.5% tungsten) known for its high melting point, excellent electrical conductivity, and chemical inertness, forming a stable, balled tip ideal for AC TIG welding of aluminum and magnesium, offering good arc stability and weld pool cleanliness but with lower current capacity and harder arc starts than alloyed types, making it generally unsuitable for DC welding due to potential contamination.
Key Characteristics
Composition: At least 99.5% pure tungsten, often classified as EWP (E-Electrode, W-Tungsten, P-Pure).
Appearance: Typically green-colored tip or marking, ground smooth.
Arc Stability: Excellent stability with AC, naturally forming a clean, balled end for welding light metals.
Heat Resistance: Very high melting point (around 3,422°C).
Current: Lower current capacity than alloyed types; best for AC, less ideal for DC.
Applications
Primary Use: TIG (Gas Tungsten Arc Welding) of aluminum and magnesium alloys.
Other Uses: Plasma cutting, high-temperature industrial processes.
Advantages
Provides a stable, clean arc on AC, minimizing weld contamination.
Consistent performance for precision work in aerospace, electronics, and automotive.
Limitations
Poor arc starting on DC and higher risk of tungsten inclusion in the weld pool.
Higher consumption rate and shorter service life compared to alloyed electrodes.
Additional Information
Delivery Time3 - 4 Days
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GST No. 27AABCS4962M1ZV
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