National foreword

This British Standard is the UK implementation of ISO 23515:2022+A1:2024. It supersedes BS ISO 23515:2022, which is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by .

The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2022.

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 11, Titanium.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

Introduction

This document was developed in response to a demand for designating an alloy system for titanium and titanium alloys developed worldwide.

As this system is established, newly developed alloys can be designated in the same way as existing alloys and it becomes possible to establish standards concerning new alloy products.

This unified classification can promote the sale of titanium and titanium alloys products in the global market.

1 Scope

This document specifies a designation system of titanium and titanium alloys in terms of their chemical composition and impurities contents.

2 Normative references

3 Terms and definitions

4 Material designation

4.1 Basis of designation

4.2 Unalloyed titanium

4.3 Titanium alloys

BS ISO 23515:2022+A1:2024

Titanium and titanium alloys. Designation system

Current

Published:

31 Dec 2024

1 Scope