This Standard is a consolidation of two ASME standards, ASME B29.16M-1995 (Welded Steel-Type Mill Chains, Attachments, and Sprocket Teeth) and ASME B29.18M-1993 (Welded Steel-Type Drag Chains, Attachments, and Sprocket Teeth). These two standards were combined into one because of the similarity of construction and the usual applications for the two types of chains. The welded-steel-type mill chains (B29.16M) were developed to provide a series of steel chains similar to cast chains of the detachable, mill, and combination types. Although the welded-steel type mill chains were introduced many years ago for the forest products industries, their extended usage in a variety of materials handling and drive applications in recent years stimulated standardization of the basic types. The welded-steel-type drag chains (B29.18M) were developed to provide a series of steel chains similar to cast drag chains in the offset and combination types. Welded steel drag chains were originally introduced for the forest products industries and their expanded usage in recent years called for standardization of basic sizes.