scope:

Scope and field of application

This part of ISO 683 gives the technical delivery requirements for

- semi-finished products, for example blooms, billets, slabs (see note 4)

- bars (see note 4)

- wire rod

- hot-rolled plates (see note 3)

- hammer or drop forgings (see note 4)

Manufactured from the direct hardening unalloyed or low alloyed steels listed in table 3 and supplied in one of the heat-treatment condition given for the different types of products in table 1, line 2 to 7 and in one of the surface conditions given in table 2.

The steels are in general intended for the fabrication of quenched and tempered or austempered (see 3.3 and note 2) machine parts, but are partly (see table 10) also applied in the normalized condition.

The requirements for mechanical properties given in this part of ISO 683 are restricted to the sizes given in table 9 and 10.

NOTES

International Standards relating to steels complying with the requirements for the chemical composition in table 3, however, supplied in other product forms or treatment conditions than given above or intended for special applications, and other related International Standards are given in annex C.

For the purpose of simplification the term "quenched and tempered" is, unless otherwise indicated, used in the following also for the austempered condition.

The term "plate" includes in the following, unless otherwise stated, also wide flat

Hammer-forged semi finished products (blooms, billets, slabs, etc.) and hammer-forged bars are in the following covered under semi-finished products or bars and not under the term "hammer and drop forgings"

In special cases, variations in these technical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see annex B).

In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.