AWS A1.1 Historical [ Revised ]

This metric practice guide contains the accepted definition of the International System of Units (SI) as contained in the pertinent ANSI and IS0 documents (see reference documents page). It contains the base units, supplementary units, derived SI units, and rules for their use in AWS documents and by the welding industry. It also contains factors and rules for converting from U.S. inch-pound units to SI units and recommendations to industry for managing the transition.