NS EN 10090 : 1ED 1999

Foreword
1 Scope
2 Normative references
3 Definitions
4 Classification and designation
    4.1 Classification
    4.2 Designation
5 Information to be supplied by the purchaser
    5.1 Mandatory information
    5.2 Supplementary information
6 Manufacturing process
    6.1 Melting process
    6.2 Manufacture of the product
    6.3 Heat treatment condition and surface finish at
          the time of delivery
7 Requirements
    7.1 Chemical composition
    7.2 Mechanical properties
    7.3 Internal and external condition
    7.4 Dimensions and tolerances
8 Testing
    8.1 Agreement of tests and inspection documents
    8.2 Number of tests
    8.3 Selection and preparation of samples and test pieces
    8.4 Test methods
    8.5 Retests
    8.6 Certification of the tests
9 Marking
10 Complaints
Annex A (informative) Technical supplement

Applicable to grades of wrought high-alloy materials, for use in intake and exhaust valves in reciprocating internal combustion engines. Applies to bars, wire, rod and forgings, and to surface finishes. Not applicable to alloys resistant to wear and corrosion used for protection of valve seat surfaces.