ISO 4991:2015
Steel castings for pressure purposes
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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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Information to be supplied by the purchaser
5 Heat treatment
6 Welding
7 Requirements
7.1 Chemical composition
7.2 Mechanical properties
8 Inspection and testing
8.1 General
8.2 Sampling
8.3 Formation of test lots
8.4 Non-destructive testing
8.5 Marking
9 Supplementary requirements
Annex A (normative) Supplementary requirements
Annex B (informative) Welding conditions
Annex C (informative) Creep properties
Annex D (informative) UNS cast grades similar to ISO cast grades
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Information to be supplied by the purchaser
5 Heat treatment
6 Welding
7 Requirements
7.1 Chemical composition
7.2 Mechanical properties
8 Inspection and testing
8.1 General
8.2 Sampling
8.3 Formation of test lots
8.4 Non-destructive testing
8.5 Marking
9 Supplementary requirements
Annex A (normative) Supplementary requirements
Annex B (informative) Welding conditions
Annex C (informative) Creep properties
Annex D (informative) UNS cast grades similar to ISO cast grades
Bibliography