AWS A1.1 PDF

This metric practice guide contains the accepted definition of the International System of Units (SI) as contained in the pertinent American National Standards Institute (ANSI) and International Standards Organization (ISO) documents (see Annex E, Other Organizations). 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.