British Standards Institution

Source:: ISO
Committee:: ISE/1 - Iron and steel standards co-ordinating committee
Categories:: Steels
Comment period start date:: 17/12/2025
Comment period end date:: 31/01/2026
Number of comments:: 0

Comment by:

31st Jan

Scope

This document specifies the definition and classification of steels. It defines the term "steel" (see clause 3) and it classifies the steel grades as main criteria by the chemical composition into non-alloy, low-alloy and high-alloy steels.

Micro-alloy steels are a subclass of low alloy steels and stainless steels are a subclass of high-alloy steels.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

16/09/2025

3. Public Comments

Public Comments start date:

17/12/2025

Public Comments end date:

31/01/2026

Learn more about the standards development process

Standards Development

BS ISO 4948-1 Steels — Classification —. Part 1: Classification of steels based on chemical composition

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