British Standards Institution

Source:: ISO
Committee:: ISE/101/7 - Methods of physical and metallographic testing
Categories:: Metal testing. Other
Comment period start date:: 05/02/2025
Comment period end date:: 31/03/2025
Number of comments:: 0

Comment by:

31st Mar

Scope

This document specifies a micrographic method of determining the non-metallic inclusions in rolled or forged steel products having a reduction ratio of at least 3 using standard reference chart or direct measurement by image analysis technologies.

This method is widely used to assess the suitability of a steel product for a given use. However, since it is difficult to achieve reproducible results owing to the distributional randomness of non-metallic inclusion, even with a large number of specimens, precautions should be taken when using the method.

NOTE For certain types of steel (e.g. free cutting steels), the standard comparison chart described in this document is not entirely applicable.

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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:

25/11/2024

3. Public Comments

Public Comments start date:

05/02/2025

Public Comments end date:

31/03/2025

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Standards Development

BS ISO 4967 ISO 4967 Steel. Determination of the non-metallic inclusion content. Micrographic method

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