The number of arcing repetitions of a tungsten electrodes, that is, the total number of times it can stabilize the arc without regrinding or replacement, usually does not have a uniform and mandatory international standard value, but in practical engineering applications and material evaluation, the following reference standards and empirical ranges are commonly used in the industry to measure its performance:
Reference Value For Common Arc Starts (under Normal Conditions)
| Electrode type | Reference range of arc start times (times) | Welding type | Notes |
| WP | 200~800 times | AC welding, low-frequency welding | It is not resistant to ablation and has a short arc life |
| WT20 | 1000~3000 times | DC welding | Arc initiation stability, strong durability (but radioactive) |
| WC20 | 1000~2500 times | DC/low current soldering | Arc initiation is sensitive, suitable for automated welding |
| WL10/WL20 | 1500~4000 times | AC/DC universal welding | Non-radioactive, excellent comprehensive performance |
| WX | More than 2000~5000 times | High-frequency automatic welding, industrial grade welding | Multi-element compounds, usually the best performing tungsten electrode |
Note: The above values are for reference only, and the specific number of arcs depends on factors such as welding current, sharpening angle, gas purity, electrode contamination degree and welding machine performance.
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