BS 7926:1998

Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Information and items to be agreed and to be
    documented
5 Sampling
6 Preparation of specimens
7 Determination of the percentage inclusion content
8 Test report
Annex A (normative)
Figure 1 - Test block
Table 1 Non-metallic inclusion content ranges from a
variety of melting and refining processes

Defines two micrographic procedures for determination of the non-metallic inclusion content of cast steels. Defines numerical values of the area fraction of non-metallic inclusions present in samples of cast steels.

This British Standard specifies two micrographic methods for determining the non-metallic inclusion content of cast steels. Numerical values of the area fraction of non-metallic inclusions present in samples of cast steels is specified.

The percentage content ranges of non-metallic inclusions are specified for four melting and refining methods in use in steel foundries throughout the UK.

In addition to the definitive requirements, this standard also requires the items detailed in clause 4 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.