This part of ISO 9328 specifies the requirements for flat products for pressure equipment, made of thermomechanically rolled weldable fine grain steels as specified in Tables A.1 and B.1. The steels are not suitable for hot forming.
Until now, no sufficient data for the standardization of the elevated temperature properties of these steels are available. If their use at such temperatures is intended, the conditions for this shall be specially agreed upon between the interested parties.
The requirements and definitions of ISO 9328-1 also apply to this part of ISO 9328.
NOTE Fine grain steels are understood to be steels with a ferritic grain size of 6 or finer when tested in accordance with ISO 643.
ISO 9328-5:2004 history
2018ISO 9328-5:2018 Steel flat products for pressure purposes - Technical delivery conditions - Part 5: Weldable fine grain steels, thermomechanically rolled
2011ISO 9328-5:2011 Steel flat products for pressure purposes - Technical delivery conditions - Part 5: Weldable fine grain steels, thermomechanically rolled
2004ISO 9328-5:2004 Steel flat products for pressure purposes — Technical delivery conditions — Part 5: Weldable fine grain steels, thermomechanically rolled
1991ISO 9328-5:1991 Steel plates and strips for pressure purposes; technical delivery conditions; part 5: austenitic steels