ISO 2401:2018 溶接材料—被覆電極—効率、金属回収率、および堆積係数の決定 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 3, Welding consumables.

This second edition cancels and replaces the first edition (ISO 2401:1972), which has been technically revised. The main changes compared to the previous edition are as follows:

• the Scope has been clarified;
• the document has been updated to the latest ISO style, including addition of Clause 2 and subsequent renumbering;
• the term 3.1, electrode efficiency has been added;
• Clause 5 has been revised and the option of eight electrodes introduced;
• Subclauses 6.1 and 6.2, the option of eight electrodes has been introduced;
• Clause 7 has been introduced to align with other ISO/TC 44/SC 3 documents;
• Clause 8, requirements on rounding procedure have been reworked (example deleted).

1 Scope

This document specifies methods for the determination of the efficiency, weld metal recovery and deposition coefficient of covered electrodes.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses: