Welding Digest

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Defining Postweld Heat Treatment

Terminology related to postweld heat treatment (PWHT) is inconsistent across AWS standards. In this article, we examine the use of PWHT and related terms in AWS D1.1/D1.1M, Structural Welding Code — Steel; AASHTO/AWS D1.5M/D1.5, Bridge Welding Code; and AWS A3.0M/A3.0, Standard Welding Terms and Definitions, and make recommendations for future code editions.