PREN 10089 : DRAFT 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 Options
6 Manufacturing process
    6.1 General
    6.2 Deoxidation
    6.3 Heat-treatment and surface condition at delivery
7 Requirements
    7.1 Chemical composition, hardness and hardenability
    7.2 Shearability
    7.3 Structure
    7.4 Internal soundness
    7.5 Surface quality and decarburisation
    7.6 Dimensions, tolerances on dimensions and shape
8 Inspection and testing
    8.1 Types and contents of inspection documents
    8.2 Specific inspection and testing
9 Marking
Annex A (normative) Supplementary or special requirements
Annex B (informative) Maximum dimensions for rounds and flats
        based on the 100 % hardenability scatterband
Annex C (informative) Dimensional standards applicable to products
        complying with this European Standard
Annex D (informative) Guidance values for the mechanical
        properties of quenched and tempered test pieces

Defines the technical delivery requirements for round and flat bars and rod manufactured from the alloy steels listed in table 3, intended for hot-formed and subsequently heat-treated springs or cold-formed and subsequently heat-treated springs.