Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 1: General requirements

1.1 This part of ISO 9327 covers the technical delivery conditions for forgings (see note 1) and for rolled or forged

bars for pressure purposes manufactured from the following internationally used steels (see note 2):

a) non-alloy and alloy ferritic or martensitic steels with specified room temperature properties and supplementary

requirements for elevated temperature properties covered in ISO 9327-2;

b) nickel steels with specified low temperature properties covered in ISO 9327-3;

c) weldable fine grain steels with high proof strength (room temperature, elevated temperature and low

temperature grades) covered in ISO 9327-4;

d) austenitic and austenitic-ferritic steels (room temperature and elevated temperature grades) covered in

ISO 9327-5.

NOTE 1 In accordance with ISO 6929 the term forgings covers here open die forgings including ring rolled products as well

as closed die forgings.

NOTE 2 Additional to the internationally used steels for pressure purposes covered in parts 2 to 5 of ISO 9327, there are

other steels used regionally or nationally for the same application. These other steels shall not be precluded by this

International Standard provided that they compl