NBN EN 10247 : 2007

Foreword
Introduction
1 Scope
2 Normative references
3 Principles
4 Terms and definitions
  4.1 General
  4.2 Proximity
  4.3 Parameters
  4.4 Classes
  4.5 Others
5 Symbols and abbreviations
6 Sampling
  6.1 General
  6.2 Minimum reduction
  6.3 Size and location of test area
  6.4 Number of specimens
  6.5 Preparation of specimens
7 Test method
  7.1 Magnification
  7.2 Field of view
  7.3 Definition of the pictures of the chart
      7.3.1 Size and Shape
      7.3.2 Parameters
      7.3.3 Arrangement of the pictures
  7.4 Procedure
      7.4.1 General
      7.4.2 Several inclusions of mixed sizes in one field
      7.4.3 Scanning
      7.4.4 Assessment and evaluation
      7.4.5 Evaluation of different types of inclusions
      7.4.6 Default assumptions
      7.4.7 Recording of results
8 Types of assessment
  8.1 Worst inclusion method: method P
      8.1.1 Principle
      8.1.2 Evaluation of P[L] (worst length)
      8.1.3 Evaluation of P[d] (worst diameter)
      8.1.4 Evaluation of P[a] (worst area)
  8.2 Worst field method: method M
      8.2.1 Principle
      8.2.2 Evaluation of M[n] (rating according to number)
      8.2.3 Evaluation of M[L] (rating according to length)
      8.2.4 Evaluation of M[d] (rating according to diameter)
      8.2.5 Evaluation of M[a] (rating according to area)
  8.3 Average field method: method K
      8.3.1 Principle
      8.3.2 Scanning of a specimen for average field
            assessment
      8.3.3 Evaluation
      8.3.4 Evaluation of K[n], K[L] for elongated and K[n],
            K[d] for globular inclusions
      8.3.5 Evaluation of K[n] and K[a]
9 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 of eyepiece graticule
      G.1 General
      G.2 Narrow field microscopes
      G.3 Broad field microscopes
Annex H (normative) Calculation basis for the pictures
        of the chart
Annex K (normative) Rules for classification
      K.1 Definition of classes
      K.2 Classification of length
      K.3 Classification of width
      K.4 Classification of diameter
      K.5 Classification of area
Annex L (informative) Comparison of inclusion types in
        different standards
Annex M (informative) Worst inclusion assessment
Annex N (informative) Worst field assessment
      N.1 General
      N.2 Evaluation of M[n]
      N.3 Evaluation of M[n], M[L] and M[d]
      N.4 Evaluation of M[n] and M[a]
Annex P (informative) Average field assessment
      P.1 General
      P.2 Evaluation of K[n], K[L] and K[d]
      P.3 Evaluation of K[n] and K[a]
      P.4 Restricted values
Annex Q (normative) Calculation basis for the assessment
      Q.1 Worst inclusion assessment
      Q.2 Worst field assessment
           Q.2.1 Calculation of M[n]
           Q.2.2 Calculation of M[L]
           Q.2.3 Calculation of M[d]
           Q.2.4 Calculation of M[a]
      Q.3 Average field
Annex R (normative) Determination of precision and scanning
        parameters for average field assessment
Annex S (informative) Edge Errors correction
      S.1 General
      S.2 Field by field measurement
Annex T (normative) Calculation of average values of
        parameters for one class
Annex U (normative) Average values of parameters
Annex V (informative) Comments of the working group
      V.1 General
      V.2 Length
      V.3 Width
      V.4 Number
      V.5 Resolution
      V.6 Area
      V.7 Description of inclusions
      V.8 Globular particles
      V.9 Shape factor
      V.10 Combined inclusions
      V.11 Measuring frame
Bibliography

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