What is ISO 630‑2 about?

ISO 630-2 is the second part in the multi-series of International Standards on ‘Steels for structural purposes’. ISO 630‑2 specifies qualities for steels for general structural use.

ISO 630‑2 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.

ISO 630‑2 covers 8 steel grades and 4 qualities. Grades S235, S275, S355, and S460 are covered in Annex A. Grades SG205, SG250, SG285 and SG345 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 ISO 630‑2 apply to hot-rolled flat products and sections with:

Thicknesses ≥ 3 mm and ≤ 150 mm for long products of steel grade S460 all qualities;
Thicknesses ≥ 3 mm and ≤ 250 mm for long products or ≤ 400 mm 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.

Who is ISO 630‑2 for?

ISO 630‑2 on structural steels is relevant to:

Steel manufacturers
Structural and mechanical engineers
Construction industry
Automotive industry
Welders
Fabricators

Why should you use ISO 630‑2?

Structural steel is a category of steel used for making construction materials in a variety of shapes.

ISO 630‑2 specifies eight steel grades. Each grade is available in up to four qualities. These grades and qualities differ in their specified mechanical properties and impact energy requirements.

ISO 630‑2 provides information on classification and designation of grades and qualities of the steel, steelmaking process, delivery condition, chemical composition, mechanical properties and the surface condition required to manufacture high-quality structural steel.

Charpy V-notch test, tensile test and impact test is provided in ISO 630‑2.

Compliance to ISO 630-2 will equip you with best practice guidance on ensuring greater formability and workability of structural steel and make the right choice for your specific engineering needs. Incorporating a standardised process will also aid in improved product development and stringent quality control measures.

What’s changed since the last update?

BS ISO 630‑2:2021 supersedes BS ISO 630‑2:2011, which has been withdrawn. The main changes compared to the previous edition are as follows:

Applicable thickness ranges have been added in the Scope
Additional terms and definitions concerning heat treatments have been deleted because ISO 4885 is in normative references of ISO 630‑1
Test units have been updated
In Tables, the designation concerning thickness has been changed into “nominal thickness”
The content of the document has been updated to harmonize with all parts of ISO 630

BS ISO 630-2:2021

Structural steels - Technical delivery conditions for structural steels for general purposes

Current

Published:

30 Apr 2021