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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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How can nitrogen get into an SMA weld?

To determine

Process of getting nitrogen into a SMA weld.

Explanation

Nitrogen comes from the atmospheric air into the arc stream. In gas metal arc welding processes, it results from strong drafts or poor shielding that affects the shield. Primary problem with nitrogen is porosity.

In an arc stream, the source of nitrogen is the atmospheric air. In shielded metal arc welding (SMAW), it appears due to carrying an excessively long arc...

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