ISO 630-5:2023 形鋼 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3, Steels for structural purposes.

This second edition cancels and replaces the first edition (ISO 630-5:2014), which has been technically revised.

The main changes are as follows:

• grades S295W, S355WSE, S420W, S460W, S500W, S550W and pertaining requirements have been added;
• applicable thickness ranges have been added in the scope;
• terms and definitions concerning heat treatments have been deleted because defined in ISO 630-1;
• quality E (impact testing at −40 °C) has been added;
• list of options has been integrated in ISO 630-1;
• test units have been updated;
• Bibliography has been updated;
• the content of the document has been updated to harmonize with the other parts of the ISO 630 series.

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

1 Scope

This document specifies qualities for flat and long products of hot-rolled structural steels with improved atmospheric corrosion resistance in the as-rolled, normalized/normalized rolled, thermomechanical control processed and quenched and tempered delivery conditions. It is applicable to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are intended for use in welded or bolted structures.

This document covers 14 grades and 5 qualities. Grades S235, S295, S355, S420, S460, S500 and S550 are covered in Annex A. Grades SG245, SG345, SG365, SG400, SG460, SG500, and SG700 are covered in Annex B. 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, sections and bars with a maximum nominal thickness of 150 mm for grades S235W, S295W, S355W, S420W, S460W, S500W and S550W, with a maximum nominal thickness of 200 mm for grades SG245, SG345, SG365, SG400, SG460, SG500, and SG700.

The steels specified in this document are applicable to hot-rolled plates with a maximum nominal thickness of 20 mm for grades S295WP and S355WP.

The steels specified in this document are applicable to hot-rolled wide flats, sections and bars with a maximum nominal thickness of 40 mm for grades S295WP and S355WP.

The steels specified in this document are applicable to hot-rolled plates with a maximum nominal thickness of 80 mm for grade S355WSE.

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 and the following apply.

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

Bibliography