Some university libraries or professional engineering institutions provide members with authorized access to ISO standards. ISO - International Organization for Standardization Key Content of ISO 17663:2023

The integrity of a welded structure depends not only on the skill of the welder or the quality of the filler metal but also on the thermal history of the material. ISO 17663 is the international standard that governs the quality requirements for heat treatment in connection with welding and allied processes.

Furnaces, ovens, and induction equipment must be . Clause 8 of the 2009 version (carried forward into 2023) emphasizes the verification and maintenance of heat treatment equipment to ensure it meets the required tolerances (e.g., temperature uniformity).