Scholars of ancient metallurgy gain insights from individual artifacts as well as from synthetic overviews because debates can turn on details of particular objects from particular contexts. Therefore, it is important for archaeometallurgical studies to provide comprehensive catalogs that specify the attributes of individual objects as well as contexts and the technical studies undertaken on those objects. This fourth volume in the series is devoted to presenting the metallurgical evidence from Ban Chiang, Ban Tong, Ban Phak Top, and Don Klang in northeast Thailand in the form of detailed catalogs organized by sites, periods, and artifact types. All metal artifacts, metallic by-products, and crucibles from the four-site study are included. A catalog of analyzed prills is also included. The catalogs summarize all the contextual, metric, and analytical data from metallographic, elemental, and microhardness analyses. Illustrations and photomicrographs provide visual evidence for the study collection. These kinds of detailed catalogs form the raw material of technical and archaeological interpretation, enabling comparisons with other collections as well as allowing scholars to form their own conclusions independently of the interpretations of the authors.