BS ISO 15787:2016 pdf download

BS ISO 15787:2016 pdf download.Technical product documentation — Heat-treated ferrous parts — Presentation and indications
1 Scope
This document specifies the manner of presenting and indicating the final condition of heat‐treated ferrous parts in technical drawings.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 128-24:2014, Technical drawings — General principles of presentation — Part 24: Lines on mechanical engineering drawings
ISO 4885, Ferrous products — Heat‐treatments — Vocabulary
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,K, N, T)
ISO/TS 8062-2, Geometrical product specifications (GPS) — Dimensional and geometrical tolerances for moulded parts — Part 2: Rules
ISO 81714-1, Design of graphical symbols for use in the technical documentation of products — Part 1:Basic rules
3 Terms, definitions
For the purposes of this document, the terms and definitions given in ISO 4885 apply.
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5 Indications in drawings
5.1 General
Indications in drawings concerning the heat‐treatment condition can relate to the assembly or final condition as well as to the condition directly after heat‐treatment. This difference has to be observed implicitly, as heat‐treated parts are often subsequently machined (e.g. by grinding). By this, the hardness depth is reduced, especially with case‐hardened, surface‐hardened and nitrided parts, as is the compound layer thickness of nitrided and nitrocarburized parts. The machining allowance shall therefore be taken into account appropriately during heat‐treatment. If no separate drawing is made for the condition of the heat‐treated part before the subsequent machining or finishing, it is necessary to give information about the machining allowance. For this, indications should be made for both states of the part: 1) after the heat‐treatment (before final machining); and 2) after the final machining. NOTE This can be done, for example, by indicating the heat‐treated state and the finished state in accordance with ISO/TS 8062‐2, by an additional representation, or by adding the words “before grinding” or “after grinding” (see Figures 16 and 30). The words indicating the heat-treated condition, the hardness and the hardness depth data shall be placed near the title block of the drawing. For some applications, it might be necessary to keep special data on the heat‐treatment process to make sure that the required properties after the heat treatment are attained. — In this case, a heat-treatment order (HTO) should be used. If an HTO exists, in the drawing, a reference shall be given by the wording “see HTO number …”. Examples are given in Figures 11, 12, 25, 29 and 42. — To document the heat-treatment process carried-out in the heat-treatment workshop, a heat- treatment document (HTD) should be used.