Overview
EN ISO 17677-1:2021 - Resistance welding - Vocabulary - Part 1: Spot, projection and seam welding establishes a standardized vocabulary of terms and definitions for resistance spot welding, projection welding and seam welding. The document defines procedural terms, hardware and tools, process parameters and measurement vocabulary used across resistance welding disciplines. It includes terms in English and French (the official ISO languages) and gives German equivalents published by DIN; only the English and French terms are ISO normative.
Key topics
The standard organizes terminology into clear technical groups, for example:
- Welding and testing procedures: definitions for spot welding, projection welding, seam welding, series/parallel spot welding, roll-spot, stitch welding and destructive tests (peel, tensile shear, chisel, pillow tests).
- Hardware and tools: electrode, electrode cap, electrode holder/adaptor, electrode wheel, welding head and electrode working face.
- Welding process and parameters: electrode force (static, dynamic, forging), force/time programs, heat time, chill/post‑heat time, cool time, current delay, off-time and expulsion/spatter.
- Measurements and values: terms used to describe heat-affected zone (HAZ), weld quality indicators and timing/force metrics for reproducible welding cycles.
The foreword notes incorporation of terms from ISO 14329 and editorial alignment with ISO/TR 25901-1 where applicable.
Applications
EN ISO 17677-1:2021 is a reference vocabulary intended to:
- Promote consistent terminology in technical specifications, test procedures and inspection reports.
- Support engineers, welding technologists, quality & conformity assessors, test laboratories, technical authors and trainers when specifying or documenting resistance welding processes.
- Aid procurement, machine manufacturers and OEMs in ensuring clear communication of electrode types, welding parameters and test methods.
Common practical uses include standardizing documentation for production welding processes, writing work instructions, preparing inspection criteria and training materials.
Related standards
- ISO 17677 series (other parts cover additional resistance welding methods)
- Terms from ISO 14329 have been implemented into this edition
- Cross-reference to ISO/TR 25901-1 for welding-related terminology and HAZ concept
Keywords: EN ISO 17677-1:2021, resistance welding vocabulary, spot welding, projection welding, seam welding, electrode force, welding terms, welding standards, ISO 17677-1.
