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ISO 9327-4:1999

Steel forgings and rolled or forged bars for pressure purposes — Technical delivery conditions — Part 4: Weldable fine grain steels with high proof strength

Jul 8, 1999

General information

90.60     Sep 5, 2018

ISO

ISO/TC 17/SC 10

International Standard

77.140.30     77.140.85  

English   French  

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Scope

1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 250 mm manufactured
from fine grain steels (see NOTE) given in Table 1 and to be delivered according to the specifications given in
ISO 9327-1.
The steels are classified into
room temperature grades (P...),
elevated temperature grades (PH...),
low temperature grades (PL...),
low and elevated temperature grades (PLH...).
NOTE Fine grain steels are here understood as steels with grain size 6 or finer according to the grain size charts in
ISO 643.
1.2 This part of ISO 9327 covers the following data:
a) In Table 1 the limits for
the chemical composition according to the cast analysis;
the tensile properties at room temperature;
the indications on the usual heat treatment condition at the time of delivery;
b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis;
c) in Table 3 the minimum impact energy values;
d) in Table 4 the minimum elevated temperature proof strength values.

Life cycle

PREVIOUSLY

Revises
ISO 2604-1:1975

NOW

PUBLISHED
ISO 9327-4:1999
90.60 Close of review
Sep 5, 2018

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