© ISO 2016 Technical product documentation — Heat treated ferrous parts — Presentation and indications Documentation technique de produits — Produits ferreux traités thermiquement — Présentation et in[.]
INTERNATIONAL STANDARD ISO 15787 Second edition 2016-09-01 Technical product documentation — Heat-treated ferrous parts — Presentation and indications Documentation technique de produits — Produits ferreux traités thermiquement — Présentation et indications Reference number ISO 15787:2016(E) © ISO 2016 ISO 15787:2016(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2016, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2016 – All rights reserved ISO 15787:2016(E) Contents Page Foreword v Introduction vi Scope Normative references Terms, definitions Abbreviated terms Indications in drawings 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 5.15 Graphical representation 6.1 6.2 6.3 6.4 General Material data Heat-treatment condition Hardness data 5.4.1 Surface hardness 5.4.2 Core hardness 5.4.3 Hardness value and limit deviations Markings 5.5.1 Marking of test points 5.5.2 Marking of slip zones Key for the allocation test point and nominal value Indication of local areas Hardness depth Carburizing depth (CD) Compound layer thickness (CLT) Oxide layer thickness (OLT) Strength data Microstructure Heat-treatment order (HTO) Heat-treatment document (HTD) General Heat-treatment of the entire part 6.2.1 Uniform condition 6.2.2 Areas with different conditions Local heat-treatment 6.3.1 General 6.3.2 Areas requiring heat-treatment 10 6.3.3 Areas that may be heat‐treated 10 6.3.4 Areas that shall not be heat-treated 10 Heat-treatment sketch 11 Practical examples 11 7.1 7.2 General 11 Quench-hardening, quench-hardening and tempering, austempering 11 7.2.1 Heat-treatment of the entire part — Allover uniform requirements 11 7.2.2 Heat-treatment of the entire part — Areas with different hardnesses 13 7.2.3 Local heat-treatment 14 7.3 Surface-hardening 15 7.3.1 General 15 7.3.2 Specification o f surface hardness 15 7.3.3 Specification o f surface‐hardening hardness depth (SHD) 15 7.3.4 Practical examples 15 7.4 Case-hardening 21 7.4.1 Specification o f surface hardness 21 7.4.2 Specification o f case‐hardening hardness depth (CHD) 21 © ISO 2016 – All rights reserved iii ISO 15787:2016(E) f 22 7.4.4 Practical examples 22 7.5 Nitriding and nitrocarburizing 27 f 27 f 27 7.5.3 Practical examples 28 7.6 Boriding 30 7.7 Annealing 30 Annex A (normative) Graphical symbols 31 S p ecificatio n o carb urizing dep th (C D ) 7.5 S p ecificatio n o nitriding hardnes s dep th (N H D ) 7.5 S p ecificatio n o co mp o und layer thicknes s (C LT) Bibliography 33 iv © ISO 2016 – All rights reserved ISO 15787:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part www.iso.org/directives Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received www.iso.org/patents Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following URL: www.iso.org/iso/foreword.html The committee responsible for this document is Technical Committee ISO/TC 10 Technical product documentation , Subcommittee SC 6, Mechanical engineering documentation This second edition o f ISO 15787 cancels and replaces the first edition (ISO 15787:2001), which has been technically revised In addition to a number of editorial revisions, the following main changes have been made with respect to the previous edition: — addition o f an indication o f both states o f the part: 1) a fter the heat treatment (be fore final machining); and 2) a fter the final machining ( Figure 16 and Figure 30); — addition of examples representing the hardness values and their limiting deviations (Table 1); — addition o f line types for the indication o f local areas and their applications ( Table 2); — addition o f line type 07.2 (dotted wide line) for carburized, carbonitrided, nitrided or nitrocarburized workpieces to indicate areas where heat treatment is not allowed; — replacement o f the representation o f hardness values, hardness depths, layer thicknesses and limiting deviations by their values and limiting deviations ( Tables 1, 3, and 5); — addition of marking of slip zones (5.5.2 ), key for the allocation test point and nominal value (5.6), indication of local areas (5.7 ), oxide layer thickness (OLT) (5.11), heat-treatment order (HTO)(5.14), heat-treatment document (HTD)(5.15); — replacement o f the title o f “Drawings providing specific indication o f heat treatment” by “Heat‐ treatment sketch” (6.4); — deletion of the former 6.4 surface fusion hardening in the 2001 edition; — deletion of the Annex A tables present in the 2001 edition; — addition o f graphical symbols (Annex A) © ISO 2016 – All rights reserved v ISO 15787:2016(E) Introduction Technical drawings of workpieces are the most important documents — for construction, development and production, — for the assembling, and — for the u s e o f the fi na l pro duc ts G enera l ly, a d rawi ng provide s i n formation ab out the workpie ce, its s hap e and de s ign, the materia l u s e d , the dimensions, surface behaviour, permitted abbreviations, inspection data, and more Workpieces made from steel and iron often have to withstand severe conditions to resist wear and corrosion To attain the required properties, the workpieces are heat-treated in most applications A drawing is a f ff successful heat-treatment For that, he should know the material used, the required heat-treatment, the required hardness and hardness depth, the expected or permitted microstructure, the required testing method and the test points for testing the heat-treated workpiece In this time of global production, it is essential to dispose of an International Standard for technical ver y i mp or tant c u ment as it a l s o i n orm s the he at‐tre ater ab out the p arame ters to b e awa re o pro duc t c u mentation, e s p e ci a l ly for or a the pre s entation and i nd ic ation o f he at‐tre ate d p a r ts T here fore, I S O 578 7: 01 wa s revi s e d to help to i mprove the qua l ity o f he at‐tre ate d workpie ce s vi © ISO 2016 – All rights reserved INTERNATIONAL STANDARD ISO 15787:2016(E) Technical product documentation — Heat-treated ferrous parts — Presentation and indications Scope T h i s c u ment s p e ci fie s the man ner o f pre s enti ng a nd i nd ic ati ng the fi na l cond ition o f he at‐tre ate d ferrous parts in technical drawings Normative references T he fol lowi ng c u ments are re ferre d to i n the tex t i n s uch a way th at s ome or a l l o f thei r content s titute s re qu i rements o f th i s c u ment For date d re ference s , on ly the e d ition cite d appl ie s For u ndate d re ference s , the late s t e d ition o f the re ference d c ument (i nclud i ng a ny amend ments) appl ie s 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 Terms, definitions For the pu r p o s e s o f th i s c u ment, the term s and defi nition s given i n I S O 8 apply ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp © ISO 2016 – All rights reserved ISO 15787:2016(E) Abbreviated terms For the pu rp o s e s o f th i s c ument, the CHD CD CLT NHD SHD HTO HTD IOD OLT fol lowi ng abbreviate d term s apply Case-hardening hardness depth Carburizing depth C omp ou nd layer th ickne s s Nitriding hardness depth Surface-hardening hardness depth Heat-treatment order Heat-treatment document Internal oxidation depth O xide layer th ickne s s Indications in drawings 5.1 General I nd ic ation s i n d rawi ngs concern i ng the he at‐tre atment cond ition c a n relate to the as s embly or fi na l cond ition a s wel l as to the cond ition d i re c tly a fter he at‐tre atment T h i s d i fference h as to b e ob s er ve d i mpl ic itly, as he at‐tre ate d p ar ts a re o ften s ub s e quently mach i ne d (e g by gri nd i ng) By th i s , the hard ne s s dep th i s re duce d , e s p e ci a l ly with c as e ‐hardene d, s ur face ‐hardene d and n itride d p ar ts , as i s the comp ou nd layer th ickne s s o f n itride d and n itro c arburi z e d p ar ts T he mach i n i ng a l lowa nce sha l l there fore b e ta ken i nto accou nt appropri ately du ri ng he at‐tre atment I f no s ep arate d rawi ng i s made for the cond ition o f the he at‐tre ate d p a r t b e fore the s ub s e quent mach i n i ng or fi n i s h i ng , it i s ne ce s s a r y to give information about the machining allowance For this, indications should be made for both states o f the p ar t: 1) a fter the he at‐tre atment ( b e fore fi na l mach i n i ng) ; and ) a fter the fi na l mach i n i ng NO TE T h i s c a n b e ne , fo r e xa mp le , b y i nd ic ati ng the he at‐tre ate d s tate a nd the fi n i s he d s tate i n accord a nce with I S O/ T S 62 ‐2 , b y a n add itio n a l repre s entation , o r b y add i n g the word s “ b e fo re gr i nd i ng ” or “a fter gr i nd i ng” (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 s ome appl ic ation s , it m ight b e ne ce s s a r y to ke ep s p e c ia l data on the he at‐tre atment pro ce s s to ma ke 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 f Figures 11, 12, 25, 29 and 42 — To document the heat-treatment process carried-out in the heat-treatment workshop, a heattreatment document (HTD) should be used re erence sha l l b e given b y the word i ng “s e e H TO numb er …” E xample s are given i n © ISO 2016 – All rights reserved ISO 15787:2016(E) 5.2 Material data Regardless o f the heat‐treatment method, generally the drawing shall identi fy the material used for the heat-treated part (name of the material, reference to the bill of materials, etc.) 5.3 Heat-treatment condition The heat‐treated condition shall be specified in words, such as “quench‐hardened”, “quench‐hardened and tempered”, “case‐hardened”, “sur face‐hardened”, “nitrided”, etc I f more than one heat‐treatment is required, these treatments shall each be identified in words in the sequence o f their execution, for example, “quench‐hardened and tempered” Indications by wording shall be chosen in accordance with ISO 4885 See Clause for practical examples The heat‐treatment condition can be achieved in di fferent ways As a result, the per formance characteristics can di ffer Particulars o f the technical process shall be specified in supplementary documents (e.g HTO, HTD) where this is of importance for the heat-treated condition 5.4 Hardness data 5.4.1 Surface hardness The surface hardness shall be indicated — as Rockwell hardness in accordance with ISO 6508-1, — as Vickers hardness in accordance with ISO 6507-1, or — as Brinell hardness in accordance with ISO 6506-1 Additional hardness values shall be given in instances where the parts in the heat-treated condition have areas with different hardnesses (see Clause 6) For case-hardened, surface-hardened, nitrided or nitrocarburized parts, the hardness decreases downwards from the surface to the core A test of the hardness in a cross section of a part from the sur face until the core yields a hardness profile; this profile can be used, for instance, in accordance with ISO 2639 to speci fy the hardness depth The sur face hardness value depends on the hardness profile, the hardness depth and the test load Therefore, if the surface hardness is indicated for case-hardened expected surface hardness or sur face‐hardened parts, the test load shall be adjusted according to the hardness depth and the 5.4.2 Core hardness The core hardness shall be indicated in the drawing where a specification is given that it is to be tested The core hardness shall be given — as Rockwell hardness in accordance with ISO 6508-1, — as Vickers hardness in accordance with ISO 6507-1, or — as Brinell hardness in accordance with ISO 6506-1 5.4.3 Hardness value and limit deviations All hardness values shall be toleranced They can be written as shown in the examples in Table © ISO 2016 – All rights reserved ISO 15787:2016(E) Table — Examples of how to represent hardness values and their limiting deviations Written mode Lower and upper limit (62 ±2) HRC (64 0/-4) HRC (60 +4/0) HRC 60 HRC up to 64 HRC (60 ) HRC +4 (61 +3/-1) HRC (750 ±75) HV10 (825 0/-150) HV10 (675 +150/0) HV10 (700 +125/-25) HV10 675 HV10 up to 825 HV10 (700 ) HV10 +125 −25 Tolerance s s hou ld b e as l arge a s fu nc tiona l ity p erm its 5.5 Markings 5.5.1 Marking of test points I f it i s ne ce s s a r y to mark the te s t p oi nt i n the d rawi ng , the s ymb ol according to Figure T he graph ic a l s ymb ol for for the te s t p oi nt s l l b e i nd ic ate d the te s t p oi nt sh a l l b e d rawn i n accorda nce with A.2 Figure — Symbol for the test point T he pre ci s e p o s ition o f the s ymb ol s l l b e p lace d accord i ng to Figure Figure — General dimensioning of a test point I f there i s more tha n one te s t p oi nt, the s ymb ol sh a l l b e d i re c tly combi ne d with a n identi fication numb er for each test point according to Figure number shall be drawn in accordance with A.3 T he graph ic a l s ymb ol for the te s t p oi nt with its identi fic ation Figure — Identification number for each test point © ISO 2016 – All rights reserved