scope:

Chains of the type covered by this Standard were introduced late in the nineteenth century. These chains met with considerable success on material conveyors and elevators. Manufacturers developed and marketed many sizes and types in the following years.

In the 1920s, a working group from the producers of these chains was formed to standardize them. In 1972, a subcommittee of American National Standards Committee B29 was appointed with American Chain Association members from the engineering steel chain industry to expand and update the existing standards.

The 1997 revision of this Standard incorporates the new definition of Minimum Ultimate Tensile Strength (M.U.T.S.), as well as updated sprocket symbols.

This revision was approved by the American National Standards Institute on April 17, 1997.