Épreuve
ISO/PRF 4991
Pièces moulées en acier pour service sous pression
Numéro de référence
ISO/PRF 4991
Edition 4
© ISO 2024
Épreuve
Projet
Projet au stade approbation.
Remplacera ISO 4991:2015

Résumé

ISO 4991:2015 covers steel castings for pressure containing parts.

It includes materials which are used for the manufacture of components subject to pressure vessel codes and components not subject to codes.

This International Standard relates to castings manufactured from unalloyed and alloyed steel grades (characterized by their chemical composition, Table 1, and mechanical properties, Tables 2, 3, 4 and 5).

NOTE Annex D gives information on ISO grade designation and available UNS numbers which are similar to the ISO grade designation.

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