ISO 630-6:2023 構造用鋼 - 第 6 部:建築用耐震性改良型構造用鋼材の技術的納入条件 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Steels for structural purposes.

This second edition cancels and replaces the first edition (ISO 630-6:2014), which has been technically revised.

The main changes are as follows:

• steel grades and qualities have been updated in the scope with the addition of a new grade (SA390) and four qualities (D, D+, E and E+);
• ― the maximum nominal thickness for plate has been changed from 125 mm to 150 mm;
• ― the specification of delivery conditions has been added to the scope to align with other parts of the ISO 630 series;
• ― the list of normative references has been updated;
• ― some terms and definitions concerning heat treatments have been deleted because they are already included in 630-1;
• ― four qualities (D, D+, E and E+) have been added to 4.2;
• ― in the tables, the designations concerning thickness have been changed to “nominal thickness”;
• ― specified values for SA390 have been added to Tables 1, 3, 4, 5, 6, 7 and 8;
• ― four new qualities (D, D+, E and E+) have been added to Table 8
• ― the layout of Table 3, 4, 5, 6, B.1, and B.2 has been updated.

A list of all parts in the ISO 630 series can be found on the ISO website.

1 Scope

This document specifies qualities for steels for seismic-proof improved structural use. It is applicable to steel plates rolled on a reversing mill, wide flats, hot-rolled sections, which are used in the as-rolled condition, with the exception of grade SA440, which is normally produced using quenched and tempered or thermomechanical controlled process and normally intended for welded or bolted structures.

This document covers 5 steel grades and 7 qualities. Grades SA235, SA325, SA345, SA390 and SA440 are covered. Not all grades are available in all qualities, and some qualities have Charpy V‑notch requirements.

The steels specified in this document are applicable to hot-rolled plates, wide flats, and sections with a minimum nominal thickness of 6 mm and a maximum nominal thickness of 150 mm for steel plates, and a maximum nominal thickness of 140 mm for wide flats and hot-rolled sections.

This document does not include the following structural steels, some of which are covered by other International Standards:

• sheet and strip, e.g. ISO 4995 or ISO 4996;
• tubular products. e.g. ISO 12633-1, ISO 12633-2.

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 terms and definitions given in ISO 630-1 apply.

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

Bibliography