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BS EN 10247:2017

BS EN 10247:2017

Current

Current

The latest, up-to-date edition.

Micrographic examination of the non-metallic inclusion content of steels using standard pictures

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-19-2017

Publisher

British Standards Institution

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Principles
6 Brief practical guide
7 Sampling
8 Test method
9 Types of assessment
10 Test report
Annex A (normative) - Type of inclusions
Annex B (normative) - Parameters and assessments
        to be used if not otherwise specified
Annex C (informative) - Examples for inclusions of
        different types
Annex D (informative) - Shape factor
Annex E (informative) - Examples for magnification
Annex F (informative) - Details of the eyepiece graticules
Annex G (normative) - Manufacturing specifications
        of the eyepiece graticule
Annex H (normative) - Calculation basis for the
        pictures of the chart
Annex I (normative) - Rules for classification
Annex J (informative) - Comparison of inclusion types
        in different standards
Annex K (informative) - Worst inclusion assessment
Annex L (informative) - Worst field assessment
Annex M (informative) - Average field assessment
Annex N (normative) - Calculation basis for the
        assessment
Annex O (informative) - Edge Errors correction
Annex P (normative) - Calculation of average values
        of parameters for one class
Annex Q (normative) - Average values of parameters
Bibliography

Specifies a method of microscopic non-metallic endogenous inclusion assessment using picture charts.

This draft European Standard defines a method of microscopic non-metallic endogenous inclusion assessment using picture charts. The method does not apply to particles of a length or diameter less than 3,0 µm or a width smaller than 2,0 µm. If defined by a product standard or agreement between the involved parties for certain special products, inclusions with a width below 2,0 µm can be evaluated by length alone.Inclusions with dimensions exceeding the upper limits in Table 2 are evaluated as belonging to the maximum class and noted separately with their true dimensions (see 7.5.6). It is assumed, if particles are elongated or if there are stringers of particles, that they are parallel to each other. Other arrangements are not covered by this draft standard. This draft European Standard applies to samples with a microscopic precipitation approaching random distribution. From the data of measurements obtained by this method, evaluation according to other standards can be established. This draft European Standard does not apply to free cutting steels. NOTE The basic principle of this draft European Standard allows the determination of non-metallic inclusion content by image analysis techniques.

Committee
ISE/101/7
DevelopmentNote
Supersedes DD ENV 10247 & 03/111296 DC. (05/2007)
DocumentType
Standard
Pages
86
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
EN 10247:2017 Identical
DIN EN 10247:2016-02 (Draft) Identical
UNI EN 10247 : 2007 Identical
NS EN 10247 : 2017 Identical
NF EN 10247 : 2007 Identical
NEN EN 10247 : 2017 Identical
I.S. EN 10247:2017 Identical
NBN EN 10247 : 2007 Identical
DIN EN 10247:2017-09 Identical

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO 4967:2013 Steel — Determination of content of non-metallic inclusions — Micrographic method using standard diagrams
DIN 50602:1985-09 METALLOGRAPHIC TEST METHODS; MICROSCOPIC EXAMINATION OF SPECIAL STEELS USING STANDARD DIAGRAMS TO ASSESS THE CONTENT OF NON-METALLIC INCLUSIONS
ISO 9042:1988 Steels — Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid

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Hardcopy - English
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