ISO 683-2-2012 pdf free download.Heat-treatable steels, alloy steels and free-cutting steels – Part 2: Alloy steels for quenching and tempering.
1.1 This part 01150 683 specifies the technical delivery requirements for
— semi-finished products, hot formed, e.g. blooms, billets, slabs (see Note 1).
— bars (see Note 1),
— wire rod.
— finished flat products, and
— hammer or drop forgings (see Note 1)
manufactured from the direct hardening alloy steels and the alloy flame- and induction-hardening steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types of products in Table 1 and in one of the surface conditions given in Table 2.
The steels are, in general, intended for the manufacture of quenched and tempered or austempered (see 3.2 and Note 2) and flame- or induction-hardened machine parts (see Tables 8 and 9).
The requirements for mechanical properties given in this part of ISO 683 are restricted to the sizes given in the relevant Table 8.
NOTE 1 Hammer-forged semi-finished products (btooms, billets, slabs. etc.). seamless rolled rings and hammer-forged bars are in the following covered under semi-finished products or bars and not under the term ‘hammer and drop forgings”.
NOTE 2 For the purposes of simplification, the tern, “quenched and tempered” is, unless otherwise indicated, used in the following also for the austempered condition.
NOTE 3 For 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 for other related International Standards, see the Bibliography.
NOTE 4 This part of ISO 683 does not apply to bright products and bars and wire rod for cold heading. For such products, see ISO 683-18 and ISO 4954,
1.2 In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see Annex B).
1.3 In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
3 Terms and definitions
For the purposes of this document, the definitions of ISO 377, Iso 4885, ISO 4948-1, ISO 4948-2, ISO 6929, ISO 14284 and the following apply.
NOTE For deviations from these terms and definitions, see Notes 1 and 2 to the Scope.
ruling section
section for which the specified mechanical properties shall apply
3.2 austempering
austenitization of a steel with a subsequent cooling to a temperature in the Bainite region and holding at this temperature until a desired degree of transformation is obtained
NOTE The subsequent cooling to room temperature can be carried out in any manner desired,
3.3 alloy steel
non-alloy steel as defined in ISO 4948-1
3.4 special
special steel as defined in ISO 4948-2
4 Classification and designation
4.1 Classification
The classification of the relevant steel grades is according to ISO 4948-1 and ISO 4948-2. All steel grades covered by this part of ISO 683 are alloy special steels.
4.2 Designation
For the steel grades covered by this part of ISO 683, the steel names as given in the relevant tables are allocated in accordance with ISO/TS 4949.
5 Information to be supplied by the purchaser
5.1 Mandatory information
The manufacturer shall obtain the following information from the purchaser at the time of enquiry and order:
a) the quantity to be delivered;
b) the designation of the product form (slab, bloom, billet, round bar, wire rod, wide flat, sheet, plate, strip, forging, etc.);
C) either the designation of the dimensional standard and the dimensions and tolerances selected from this (see 7.9) or, for example in the case of drop forgings. the designation of the drawing or any other document covering the dimensions and tolerances required for the product:
d) reference to this part of ISO 683, i.e. ISO 683-2;
e) the designation of the steel grade given in Table 3;ISO 683-2 pdf free download.