ISO 630-2:2021

This document specifies qualities for steels for general structural use. This document applies to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are used in the as-delivered condition and normally intended for welded or bolted structures.

This document covers 8 steel grades and 4 qualities. GradesS235, S275, S355, and S460 are covered in AnnexA. GradesSG205, SG250, SG285 and SG345 are covered in AnnexB. 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 flat products and sections with:

— thicknesses ≥3mm and ≤150mm for long products of steel grade S460 all qualities;

— thicknesses ≥3mm and ≤250mm for long products or ≤400mm for flat products of all other grades and qualities;

and no restriction on nominal thickness for grades SG205, SG250, SG285, and SG345 for flat products, sections and long products.

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

— sheet and strip: refer to ISOTC17/SC12 “Continuous mill flat rolled products”;

— tubular products: refer to ISOTC5/SC1 “Steel tubes”.

NOTE1 Lists of standards covered by ISO/TC17/SC12 and ISO/TC5/SC1 are available on the ISO website.

NOTE2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless otherwise stated.