BS ISO 4986:2010 Steel castings. Magnetic particle inspection
BS ISO 4986 specifies a method for the magnetic particle inspection of ferro-magnetic steel castings.
It also gives acceptance criteria through severity levels defined by the nature, the area and the dimensions of the discontinuities present.
BS ISO 4986 applies to all ferro-magnetic castings, independent of the moulding method.
A steel casting is considered to be ferro-magnetic if the magnetic induction is greater than 1 T (Tesla) for a magnetic field strength of 2,4 kA/m.
BS ISO 4986 only applies to those areas of the castings specified for inspection, as well as the percentage of castings to be inspected
Contents of BS ISO 4986:
Foreword
Introduction
1 Scope
2 Normative references
3 Ordering information
4 Method of inspection
4.1 Operating mode
4.2 Qualification of the operators
4.3 Surface preparation
4.4 Conditions of inspection
5 Acceptance criteria
5.1 Definition of magnetic-inspection indications
5.1.1 General
5.1.2 Non-linear indications (SM
5.1.3 Linear indications (LM)
5.2 Severity levels
5.2.1 General
5.2.2 Non-linear indications
5.2.3 Linear and aligned indications
5.2.4 Selection of the severity level
5.2.5 Designation of severity levels
6 Classification of the indications and interpretation of results
6.1 Classification of the indications using Tables 1 and 2
6.1.1 General
6.1.2 Non-linear indications
6.1.3 Linear and aligned indications
6.2 Interpretation of results
7 Cleaning after examination and demagnetization
8 Inspection documents
Annex A (informative) Recommended surface finish for magnetic particle inspection
Annex B (informative) Reference figures — Non-linear indications (SM
Annex C (informative) Reference figures — Linear (LM) and aligned (AM) indications
Annex D (informative) Model of a magnetic particle inspection document
Bibliography
