In the AWS electrode classification E-W TH-2, what does the '2' denote?

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Multiple Choice

In the AWS electrode classification E-W TH-2, what does the '2' denote?

Explanation:
In the AWS tungsten electrode classification, the number after TH shows how much alloying oxide is in the electrode. The code TH-2 means the electrode contains about 2% thorium oxide by weight. This thorium oxide is the alloying element added to improve electron emission and arc stability, especially for DC welding. So the 2 denotes the percent of the alloying oxide present.

In the AWS tungsten electrode classification, the number after TH shows how much alloying oxide is in the electrode. The code TH-2 means the electrode contains about 2% thorium oxide by weight. This thorium oxide is the alloying element added to improve electron emission and arc stability, especially for DC welding. So the 2 denotes the percent of the alloying oxide present.

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