What is interpass temperature and why is it important in multi-pass welds?

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Study for the GMAW Welding Level 2 Test. Master GMAW welding techniques with multiple choice questions and detailed explanations. Prepare confidently for your exam!

Multiple Choice

What is interpass temperature and why is it important in multi-pass welds?

Explanation:
Interpass temperature is the temperature of the weld area between successive passes, kept within a specified range (often with a maximum limit). Controlling this temperature in multi‑pass welds is important because it affects hydrogen diffusion and residual stresses, reducing the risk of hydrogen cracking and distortion, and ensuring proper bonding between passes. It’s not about the shielding gas temperature or the filler metal temperature, and it is indeed a concern in GMAW when welding in multiple passes.

Interpass temperature is the temperature of the weld area between successive passes, kept within a specified range (often with a maximum limit). Controlling this temperature in multi‑pass welds is important because it affects hydrogen diffusion and residual stresses, reducing the risk of hydrogen cracking and distortion, and ensuring proper bonding between passes. It’s not about the shielding gas temperature or the filler metal temperature, and it is indeed a concern in GMAW when welding in multiple passes.

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