C/R

This specification contains the requirements for designing, friction stir welding, and inspecting aluminum aerospace hardware. Friction stir welding (FSW) produces a weld between two abutting workpieces by the friction heating and plastic material displacement caused by a rotating tool that traverses along the weld joint.

Units of Measure. This standard makes use of both U.S. Customary Units and the International System of Units (SI). The latter are shown within brackets [ ] or in appropriate columns in tables and figures. The measurements may not be the exact equivalents; therefore, each system shall be used independently. Consult AWS A1.1, Metric Practice Guide for the Welding Industry, for additional information.

Health and Safety. Safety and health issues and concerns are beyond the scope of this standard and therefore are not fully addressed herein. Safety and health information is available from other sources, including, but not limited to, ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes, and applicable federal, state, and local regulations.