BS EN 10247:2017
Current
The latest, up-to-date edition.
Micrographic examination of the non-metallic inclusion content of steels using standard pictures
Hardcopy , PDF
English
19-09-2017
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.
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 |
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.
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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