EN 10090:1998

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

1.1 This European Standard applies to the grades of wrought high-alloy materials listed in table 1. These valve materials are used for intake and exhaust valves in reciprocating internal combustion engines. It is applicable to bars, wire, rod and forgings and for the surface finishes listed in note 3 of 6.3. 1.2 This European Standard does not apply to alloys resistant to wear and corrosion which are used to protect valve seat surfaces.