TS EN ISO 25239-1

TS EN ISO 25239-1 is a vocabulary standard for friction stir welding as applied to aluminium and aluminium alloys. Its purpose is to define the terminology used in this welding family, not to prescribe process settings, performance requirements, or acceptance criteria.

Why terminology matters in friction stir welding

Friction stir welding is a solid-state joining process: a rotating tool generates frictional heat and plastic deformation so the materials consolidate without being melted. In aluminium fabrication, that distinction is important because the process is often discussed in terms of heat input, tool action, material flow, and joint formation. A controlled vocabulary helps engineers, welders, inspectors, and educators use the same terms for the same physical features and process stages.

What this part covers

According to the supplied scope, this document defines terms related to friction stir welding, and it states that the term “aluminium” includes aluminium and its alloys. In practical terms, that means the standard supports consistent language for the process and its associated concepts, while leaving detailed process rules, testing methods, and qualification requirements to other documents if applicable.

• It is a vocabulary standard, not a process specification.
• Its subject is terminology for friction stir welding.
• The word “aluminium” is used broadly to cover aluminium and aluminium alloys.
• Part 1 indicates the vocabulary section of the series.