Which of the following may be used by an inspector to identify materials used in welded construction?

The Certified Mill Test Report (CMTR) is essential for identifying materials used in welded construction because it provides detailed documentation of the material’s specifications and properties. This report includes information such as material grade, chemical composition, mechanical properties, and heat treatment data. It serves as an official record from the manufacturer, ensuring that the material meets the required standards for the specific application.

In contrast, while visual inspection can reveal surface characteristics, it cannot definitively provide material identification or verify compliance with specifications. Welding procedure specifications outline how welding should be done but do not contain detailed information about the material itself. Welding soundness tests assess the integrity of the welds but do not identify the materials used in the construction. Therefore, the CMTR is the most reliable source for accurately identifying materials in welded constructions.