Foreword

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This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 6, Resistance welding and allied mechanical joining, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 5821:2009), which has been technically revised.

The main changes are as follows:

— Clause 4, Tables 1 and 2 revised, and Tables 2 and 3 renumbered;
— Clause 6, examples updated to new values in Tables 1 and 2 more examples added for clarification;
— Clause 7, labelling on the packages, and marking on each electrode cap surface;
— Figure 1, updated drawings with correct proportions;
— Figure 2, added to know the variety of the water-cooling hole bottom profiles;
— Annex A, revised and made informative;
— Annex B, added to show the comparative table of electrode tip shape names in some countries.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html. Official interpretations of ISO/TC 44 documents, where they exist, are available from this page: https://committee.iso.org/sites/tc44/home/interpretation.html.

BS EN ISO 5821:2025

Resistance welding. Spot welding electrodes. Female electrode caps

Current

Published:

30 Jun 2025