ISO 4978:2018 溶接ガスボンベ用鋼板とストリップ | 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 ).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents ).

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

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This document was prepared by Technical Committee ISO/TC 17, Steel, SC 10, Steel for pressure purposes.

This second edition cancels and replaces the first edition ISO 4978:1983, which has been technically revised. The following main changes have been made:

• the title has been changed from “flat rolled steel products” to “steel sheet and strip”;
• the Scope has been changed from “flat rolled steel products with a thickness up to 6 mm” to “hot-rolled steel sheet and strip with a thickness up to 12 mm”;
• the normative references have been updated;
• a new option c) for maximum carbon equivalent value has been added to the list of options for the purchaser in 4.2;
• statements concerning the surface condition under 6.5.1 and internal quality under 6.5.3 have been revised;
• the tables and statements concerning chemical composition, mechanical properties, testing and assessment of non-metallic inclusions have been completely revised or added;
• the Bibliography has been added.

1 Scope

This document specifies the characteristics of hot-rolled steel sheet and strip with a thickness up to 12 mm inclusive of the non-alloyed steels listed in Table 1, which are intended for welded gas cylinders in accordance with ISO 4706.

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:

Bibliography