Standardization of uncoated steels for structural purposes (for bridges, building, etc.) and for general engineering purposes (steels not intended for heat treatment by the consumer), in terms of:

  • qualities
  • dimensions and tolerances for plates, wide flats, bars and sections excluding:
    • flat rolled products manufactured on a continuous mill
    • steel for the reinforcement of concrete and prestressing steels
    • wire and wire rods
    • structural hollow sections.

Quick links


published ISO standards *

under the direct responsibility of ISO/TC 17/SC 3


ISO standards under development *

under the direct responsibility of ISO/TC 17/SC 3


Participating members


Observing members

* number includes updates

Reference Title Type
ISO/TC 17/SC 3/WG 14 Surface finish of hot-rolled plates and wide flats – Delivery requirements Working group
ISO/TC 17/SC 3/WG 16 Technical delivery conditions for structural steels with improved atmospheric corrosion resistance Working group
ISO/TC 17/SC 3/WG 17 Technical delivery conditions for seismic-proof improved structural steels for building Working group

Liaison Committees to ISO/TC 17/SC 3

The committees below can access the documents of ISO/TC 17/SC 3:

Reference Title ISO/IEC
ISO/TC 167 Steel and aluminium structures ISO


Liaison Committees from ISO/TC 17/SC 3

ISO/TC 17/SC 3 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 17/SC 12 Continuous mill flat rolled products ISO
ISO/TC 167 Steel and aluminium structures ISO


Organizations in liaison (Category A and B)

Acronym Title Category
IACS - classification International Association of Classification Societies A
IIW International Institute of Welding A

ISO/TC 17/SC 3 - Secretariat

AFNOR [France]

Association française de normalisation
11 rue Francis de Pressensé
F-93571 La Plaine Saint-Denis Cedex

Tel: +33 1 41 62 80 00
Fax: +33 1 49 17 90 00