This specification prescribes requirements for the classification of plain carbon steel, chromium-molybdenum low alloy steel, stainless steel, nickel alloy, and coppernickel alloy consumable inserts¹ for use in conjunction with the gas tungsten arc welding process. These inserts also may be used with any other welding process for which they are found suitable. Included are packaging and testing requirements.

Safety and health issues and concerns are beyond the scope of this standard and, therefore, are not fully addressed herein. Some safety and health information can be found in the Informative annex Clauses A5 and A10. 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 and state regulations.

This specification makes use of both U.S. Customary Units and the International System of Units (SI). The measurements are not exact equivalents, therefore, each system must be used independently of the other without combining in any way when referring to material properties. The specification with the designation A5.30 uses U.S. Customary Units. The specification A5.30M uses SI Units. The latter are shown within brackets [ ] or in appropriate columns in tables. Standard dimensions based on either system may be used for sizing of consumable inserts under A5.30 and A5.30M.

¹ "Consumable insert," is defined in AWS A3.0, Standard Welding Terms and Definitions, as: "Filler metal that is placed at the joint root before welding, and is intended to be completely fused in the joint root to become part of the weld."