Tiêu chuẩn iso 00683 3 2016

INTERNATIONAL STANDARD ISO 683-3 Second edition 2016-07- 15 Heat-treatable steels, alloy steels and free-cutting steels — Part 3: Case-hardening steels Aciers pour traitement thermique, aciers alliés et aciers pour décolletage — Partie 3: Aciers pour cémentation Reference number ISO 683-3:2016(E) © ISO 2016 ISO 683-3:2016(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 683-3:2016(E) Page Contents Foreword v Scope Normative references Terms and definitions Classification and designation 4.2 Designation C las s ificatio n Information to be supplied by the purchaser 5.3 Ordering example Manufacturing process 6.1 General 6.2 Deoxidation f 6.3.2 Particular heat-treatment condition 6.3.3 Particular surface conditions f Requirements 7.1.1 General 7.1.2 Chemical composition 7.4 Grain size 7.5 Non-metallic inclusions 7.5.1 Microscopic inclusions 7.5.2 Macroscopic inclusions 7.6 Internal soundness 7.7 Surface condition 7.8 Shape, dimensions and tolerances Inspection f f f 8.3.1 General 8.3.2 Visual and dimensional inspection Test methods f f 9.3 Retests 10 Marking Annex A (normative) Supplementary or special requirements 29 M andato ry in fo rmatio n O p tio ns and/o r s up p lementary o r s p ecial requirements 6.3 H eat- treatment co nditio n and s ur ace co nditio n at delivery 6.3 N o rmal co nditio n at delivery 6.4 Traceab ility o the cas t 7.1 C hemical co mp o s itio n, hardnes s and hardenab ility 7.2 M achinab ility 7.3 C o ld s hearab ility 8.1 Tes ting p ro cedures and typ es o 8.2 Frequency o 8.3 Tes ts to b e carried o ut 9.1 C hemical analys is 9.2 H ardnes s and hardenab ility tes ts cuments tes ting o r s p ecific ins p ectio n 9.2 Verificatio n o hardnes s 9.2 Verificatio n o hardenab ility (informative) Annex B Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems 31 © ISO 2016 – All rights reserved iii ISO 683-3:2016(E) (informative) Annex C Dimensional standards applicable to products complying with this part of ISO 683 33 (informative) Annex D f as a function of diameter after hardening and tempering at 200 °C 34 C l a s s i f i c a t i o n o s t e e l g r a d e s a c c o r d i n g t o m i n i m u m t e n s i l e s t r e n g t h Bibliography 35 iv © ISO 2016 – All rights reserved ISO 683-3:2016(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 (see 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 (see 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 ISO/TC 17, Steel, Subcommittee SC 4, Heat-treatable and alloy steels This second edition cancels and replaces the first edition (ISO 683-3:2014), o f which it constitutes a minor revision ISO 683 consists of the following parts, under the general title Heat-treatable steels, alloy steels and freecutting steels: — Part 1: Non-alloy steels for quenching and tempering — Part 2: Alloy steels for quenching and tempering — Part 3: Case-hardening steels — Part 4: Free-cutting steels — Part 5: Nitriding steels — Part 14: Hot-rolled steels for quenched and tempered springs — Part 15: Valve steels for internal combustion engines — Part 17: Ball and roller bearing steels — Part 18: Bright steel products © ISO 2016 – All rights reserved v INTERNATIONAL STANDARD ISO 683-3:2016(E) Heat-treatable steels, alloy steels and free-cutting steels — Part 3: Case-hardening steels Scope T h i s p a r t o f I S O s p e ci fie s the te ch n ic a l del iver y re qu i rements — s em i-fi ni s he d pro duc ts , ho t forme d, for e g blo om s , bi l le ts , s lab s (s e e No te 1) , — bars (see Note 1), — wire rod, — fi n i she d fl at pro duc ts , a nd — hammer or drop forgings (see Note 1) manu fac tu re d from the c a s e -ha rden i ng non- a l loy or a l loy s te el s l i s te d i n o f the he at-tre atment cond ition s given for Table and supplied in one Table and in one of the the d i fferent typ e s o f pro duc ts i n surface conditions given in Table The steels are, in general, intended for the manufacture of case-hardened (see 3.1) machine parts NO TE H a m mer- forge d s em i-fi n i s he d pro duc ts ( b lo o m s , bi l le ts , s l ab s , e tc ) , s e a m le s s ro l le d r i ngs a nd h a m mer- forge d b a rs a re covere d u nder s em i-fi n i s he d pro duc ts or b a rs a nd no t u nder the ter m “ h a m mer a nd drop forgings” NO TE Fo r I nter n atio n a l S ta nd a rd s rel ati n g to s te el s compl yi ng with the re qu i rements fo r the chem ic a l composition in Table 3, however, supplied in other product forms or treatment conditions than given above or i ntende d fo r s p e c i a l ap p l ic atio n s , a nd fo r o ther rel ate d I ntern ation a l S ta nda rd s , s e e the B ib l io grap hy I n s p e c i a l c a s e s , va ri ation s i n the s e te ch n ic a l del iver y re qui rements or add ition s to them c an s ubj e c t o f an agre ement at the ti me o f enqui r y and order (s e e 5.2 and Annex A) form the I n add ition to th i s p ar t o f I S O , the genera l te ch n ic a l del iver y re qu i rements o f I S O 4 a re appl ic able Normative references T he fol lowi ng i nd i s p en s able c u ments , i n whole or i n p ar t, are normatively re ference d i n th i s c u ment a nd are to its appl ication 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 u ment (i nclud i ng any amend ments) appl ie s ISO 377, Steel and steel products — Location and preparation ofsamples and test pieces for mechanical testing ISO 404, Steel and steel products — General technical delivery requirements ISO 642:1999, Steel — Hardenability test by end quenching (Jominy test) ISO 643, Steels — Micrographic determination of the apparent grain size ISO 4885, Ferrous products — Heat treatments — Vocabulary ISO 4948-1, Steels  —  Classification  —  Part  1:  Classification  of  steels  into  unalloyed  and  alloy  steels  based  on chemical composition © ISO 2016 – All rights reserved ISO 683-3:2016(E) ISO 4948-2, Steels  —  Classification  —  Part  2:  Classification  of  unalloyed  and  alloy  steels  according  to  main  quality classes and main property or application characteristics ISO 4967, Steel — Determination of content of non-metallic inclusions — Micrographic method using standard diagrams ISO 6506-1, Metallic materials — Brinell 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 6929, Steel products — Vocabulary ISO 7788, Steel  —  Surface  finish  of  hot-rolled  plates  and  wide  flats  —  Delivery  requirements ISO 9443, Heat-treatable and alloy steels — Surface quality classes for hot-rolled round bars and wire rods — Technical delivery conditions ISO 10474, Steel and steel products — Inspection documents ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition ISO/TR 9769, Steel and iron — Review of available methods of analysis ISO/TS 4949, Steel names based on letter symbols Terms and definitions For the purposes o f this document, the definitions o f 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 Note o f the Scope and footnote a o f Table 3.1 case-hardening steels structural steels with a relatively low carbon content, which are carburized or carbonitrided on their sur face and subsequently hardened Note to entry: These steels, a fter hardening, have a high degree o f hardness in the sur face zone and good resistance to wear, while the core material is characterized principally by extreme toughness Note to entry: Further, possibilities for heat treatment o f case-hardening steels are, for example, nitrocarburizing and nitriding 3.2 non-alloy steel as defined in ISO 4948-1 3.3 alloy steel as defined in ISO 4948-1 Classification and designation 4.1 Classification The classification o f the relevant steel grades is according to ISO 4948-1 and ISO 4948-2 Steel grades C10E, C10R, C15E, C15R, C16E, C16R and 22Mn6 are non-alloy special steels All other steel grades covered by this part o f ISO 683 are alloy special steels © ISO 2016 – All rights reserved ISO 683-3:2016(E) 4.2 Designation For the steel grades covered by this part o f ISO 683, the steel names as given in the relevant tables are allocated in accordance with ISO/TS 4949 5.1 Information to be supplied by the purchaser Mandatory information The following in formation shall be supplied by the purchaser at the time o f enquiry and order: a) quantity to be delivered; b) designation o f the product form (slab, bloom, billet, round bar or square bar, wire rod, wide flats, sheet, plate, strip, forging, etc.); c) either the designation of the dimensional standard and the dimensions and tolerances selected from this (see 7.8) 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) a re ference to this part o f ISO 683, i.e ISO 683-3; e) the designation o f the steel type given in Table ; f ) standard designation for a test report 2.2 or, i f required, any other type o f inspection document in accordance with ISO 10474 (or according to another regional standard, e.g EN 10204 or JIS G 0415) 5.2 Options and/or supplementary or special requirements A number o f options are specified in this International Standard and listed below I f the purchaser does not indicate the wish to implement any o f these options, the products will be supplied in accordance with the basic specifications o f this part o f ISO 683 (see 5.1): a) i f a heat-treatment condition other than the untreated condition is required, the symbol for this other condition (see Table , column 2); b) i f a sur face condition other than “hot worked” or a special sur face quality is required, the sur face condition (see Table ) and the sur face quality (see 7.7.3 ); c) any requirement for restricted hardenability scatter bands for alloy steels (+HH, +HL; see Table and Figure 1); 7.1.1, d) i f any supplementary requirement shall be complied with, the symbol and, where necessary, the details o f this supplementary requirement (see Annex A); e) any requirement for the verification o f non-metallic inclusion content (see 7.5 ); f ) verification o f hardenability and, i f agreed, the in formation about calculation o f the hardenability (see 9.2.2 ); g) any requirement concerning suitability o f bars and rod for bright drawing (see 7.7.4); h) any requirement relating to removal o f sur face de fects (see 7.7.5) 5.3 Ordering example EXAMPLE 50 hot-rolled round bars in accordance with ISO 1035-1 with a nominal diameter of 40 mm and a nominal length of 000 mm with diameter tolerance according to class S and with length tolerance according to class L2 of ISO 1035-4 made of steel grade ISO 683-3, 20MnCr5 (see Table 3) in the heat-treatment condition annealed (+A), surface blast cleaned (+BC) (see Table ), product analysis/option A.3 with an inspection certificate 3.1 in accordance with ISO 10474 © ISO 2016 – All rights reserved ISO 683-3:2016(E) 50 Round bars ISO 1035 – 40,0S × 000L2 ISO 683-3 – 20MnCr5+A+BC, Option A.3 ISO 10474 – 3.1 Manufacturing process 6.1 General T he ma nu fac turi ng pro ce s s o f the s te el and o f the pro duc ts is, with the re s tric tion s given b y the requirements in 6.2 to 6.4, left to the discretion of the manufacturer For minimum reduction ratio or minimum thickness deformation ratio of rolled and forged products, see A.4 6.2 Deoxidation All steels shall be deoxidized 6.3 Heat-treatment condition and surface condition at delivery 6.3.1 Normal condition at delivery Un le s s o ther wi s e agre e d at the ti me o f enqu i r y a nd order, untreated condition, i.e hot-worked condition the pro duc ts s l l b e del ivere d i n the 6.3.2 Particular heat-treatment condition I f s o agre e d at the ti me o f enqu i r y and order, the pro duc ts s l l b e del ivere d i n one o f the he at-tre atment conditions given in Table 1, lines to 6.3.3 Particular surface conditions I f s o agre e d at the ti me o f enqu i r y and order, the pro duc ts sha l l b e del ivere d i n one o f the p ar tic u la r surface conditions given in Table 2, lines to 6.4 Traceability of the cast The products shall be traceable to the cast, see Clause 10 Requirements 7.1 Chemical composition, hardness and hardenability 7.1.1 General Table and hardness range) give s a s ur vey on combi nation s o f u s ua l he at-tre atment cond ition s at del iver y, pro duc t and re qu i rements as s p e ci fie d i n Un le s s o ther wi s e agre e d for Tables to form s (chem ic a l comp o s ition, h ardenabi l ity, ma xi mu m rd ne s s a l loy s te el s , the rdenabi l ity re qu i rements given i n Table apply I f agre e d at the ti me o f enqu i r y a nd order, a l loy s te el s with re s tric te d h ardenabi l ity s catter b and s given in Table or shown in Figure shall be supplied © ISO 2016 – All rights reserved ISO 683 -3 : 01 6(E) Y c) Y d) 22 © ISO 2016 – All rights reserved ISO 683-3:2016(E) Y e) Y f) © ISO 2016 – All rights reserved 23 ISO 683 -3 : 01 6(E) Y g) Y h) 24 © ISO 2016 – All rights reserved ISO 683 -3 : 01 6(E) Y i) Y j) © ISO 2016 – All rights reserved 25 ISO 683 -3 : 01 6(E) Y k) Y l) 26 © ISO 2016 – All rights reserved ISO 683 -3 : 01 6(E) Y m) Y n) © ISO 2016 – All rights reserved 27 ISO 683-3:2016(E) Y Y o) p) Key X distance from quenched end of test piece, mm Y hardness, HRC upper limit upper limit, +HL grades lower limit, +HH grades lower limit Figure — Scatter bands for Rockwell C hardness in end quench hardenability test 28 © ISO 2016 – All rights reserved ISO 683-3:2016(E) Annex A (normative) Supplementary or special requirements NO TE I t i s i ntende d th at one or mo re o f the fo l lowi ng s upp lementa r y or s p e c i a l re qu i rements b e app l ie d , b ut on l y where s p e c i fie d i n the enqu i r y a nd o rder I t i s i ntende d th at, where ne ce s s a r y, de ta i l s o f the s e re qu i rements b e agre e d up o n b y the m a nu fac tu rer a nd pu rch a s er at the ti me o f enqu i r y a nd order A.1 Fine grain steel Fi ne gra i n s te el s l l h ave an au s ten ite gra i n s i z e o f or fi ner I f s p e ci fic te s ti ng i s ordere d, the gra i n s i ze re qui rement i s to b e veri fie d b y de term i n i ng the a lu m i n iu m content or m icro graph ica l ly T he fi ne gra i n s truc ture i s norma l ly ach ieve d, when the to ta l a lu m i n iu m content i s a m i n i mu m o f , 01 % I n s uch a ca s e, the m ic ro graph ic i nve s tigation i s no t ne ce s s ar y T he a lu m i n ium content sh a l l b e given i n the inspection document Otherwise, one test piece per cast shall be inspected for the determination of the apparent austenitic in accordance with the Mc-Quaid-Ehn method described in ISO 643 and the grain structure shall be gra i n s i ze S ampl i ng a nd s a mple prep aration sha l l b e as s p e ci fie d i n I S O 43 T he s te el sh a l l b e te s te d s idere d s ati s fac tor y i f 70 % o f the are a i s with i n the s p e c i fie d s i ze l i m its Un le s s o ther wi s e agre e d at the ti me o f enqui r y and order, the grai n s i ze s l l b e de term i ne d c arburi ze d s p e ci men p owder at 9 C ± 10 ° C C for ± from a C a rbu ri z ation sha l l b e ach ieve d b y mai ntai n i ng the s p e ci men i n c arbu ri z i ng 10 °C for h T his is genera l ly done b y ke epi ng the c arburi z i ng ch amb er at h , i nclud i ng a prehe ati ng p erio d I n mo s t c as e s , a c arbu ri z e d l ayer o f approxi mately mm is obtained After carburizing, cooling of the specimen at a rate slow enough ensures the cementite pre cipitati ng on the gra i n b ou nda rie s o f the hyp o eute c toid z one o f the c arbu ri z e d layer A.2 Non-destructive tests T he pro duc ts sh a l l b e non- de s truc tively te s te d u nder cond ition s and to an accep ta nce s tandard agre e d at the ti me o f enqu i r y and order A.3 Product analysis O ne pro duc t a na lys i s s l l b e c a rrie d out p er c as t are s p e c i fie d for T he cond ition s for the de term i nation o f a l l elements for wh ich va lue s the c a s t a na lys i s o f the s te el typ e concerne d for s ampl i ng sh a l l b e i n accorda nce with I S O 142 I n c as e s o f d i s pute, the ana lys i s sha l l be carried out, if possible, in accordance with a reference method taken from one of the International Standards listed in ISO/TR 9769 A.4 Reduction ratio and deformation ratio If the central soundness of the hot-rolled or forged products is important, the purchaser shall be aware that a minimum reduction ratio (referred to the cross section) for long products or a minimum thickness de formation ratio (re ferre d to the th ickne s s) for fl at pro duc ts i s ne ce s s a r y I n th i s c a s e, a m i n i mu m re duc tion ratio or a m i ni mum th ickne s s de formation ratio o f e g 4: , for i n s tance, may b e agre e d at the ti me o f enqu i r y and order © ISO 2016 – All rights reserved 29 ISO 683-3:2016(E) A.5 Special agreements for marking T he pro duc ts s l l b e ma rke d i n the way s p e ci a l ly agre e d at the ti me o f enqu i r y and order 30 © ISO 2016 – All rights reserved ISO 683-3:2016(E) Annex B (informative) Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems Table B.1 — Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems Steel designations according to a ISO name (ISO 683-3) ISO number (ISO 683-3) ASTM/UNS b EN 10084:2008 c JIS G 4052 d i/n/w f i/n/w f GB/T 5216 e i/n/w f i/n/w f Non-alloy steel grades C10E C10R C15E C15R C16E C16R 22Mn6 — — — — — — — — — — — — — — — — — — — — — C10E C10R C15E C15R C16E C16R — 1.1121 1.1207 1.1141 1.1140 1.1148 1.1208 — n n n n n n — S10C — S15C — — — SMn420 n — n — — — n — — — — — — — — — — — — — — — — 15CrH — n — n 20CrH i — — — — — — i — i — Alloy steel grades 17Cr3 17CrS3 — — — — — — 17Cr3 17CrS3 1.7016 1.7014 i i 20Cr4 — — — — — — 20CrS4 28Cr4 28CrS4 16MnCr5 16MnCrS5 — — — — — — — — — — — — — — — — 28Cr4 28CrS4 16MnCr5 16MnCrS5 — 1.7030 1.7036 1.7131 1.7139 — i i n n — — SCr420/ SCr420H — — — — — 16MnCrB5 — — — 16MnCrB5 1.7160 i — — 20MnCr5 20MnCrS5 — — — — — — 20MnCr5 20MnCrS5 1.7147 1.7149 n n — — 18CrMo4 — — — 18CrMo4 1.7243 n — — SCM418 SCM418H — 28CrH — 16CrMnH — 15CrMnBH 20CrMnH — n 20CrMoH n 18CrMoS4 — — — 18CrMoS4 1.7244 n — — — n i — — a See the sources in Bibliography b US steel listed in ASTM X in UNS – i f the steel number is given in brackets, then the steel has only a UNS number c European steel listed in EN 10084:2008 and in the “Stahl-Eisen-Liste”; i f the steel number is given in parentheses/brackets, the steel is only listed in the “Stahl-Eisen-Liste” d Japanese Industrial Standard e Chinese National Standard f i = identical steel to ISO steel grade; n = steel grade with closer match o f composition, but not identical; w = wider match © ISO 2016 – All rights reserved 31 ISO 683-3:2016(E) Table B.1 (continued) Steel designations according to a ISO name (ISO 683-3) 24CrMo4 24CrMoS4 22CrMoS3–5 20MoCr4 20MoCrS4 16NiCr4 16NiCrS4 18NiCr5–4 17CrNi6–6 15NiCr13 20NiCrMo2–2 20NiCrMoS2–2 17NiCrMo6–4 18CrNiMo7–6 ISO number (ISO 683-3) EN 10084:2008 c ASTM/UNS b JIS G 4052 d i/n/w f i/n/w f — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — Alloy steel grades — — — 22CrMoS3–5 20MoCr4 20MoCrS4 16NiCr4 16NiCrS4 18NiCr5–4 17CrNi6–6 — 1.7333 1.7321 1.7323 1.5714 1.5715 1.5810 1.5918 — i i i i i i i 15NiCr13 1.5752 20NiCrMo2–2 GB/T 5216 e i/n/w f i/n/w f — — — — — — — — — — — 22CrMoH — — — — — 17Cr2Ni2H — n — — — — — i n — — SNCM220 SNCM220H n 20CrNiMoH i — — — — — — — — — — n SCM425/ SCM425H — — — — — — — — SNC815 SNC815H 1.6523 n 20NiCrMoS2–2 1.6526 n 17NiCrMo6–4 1.6566 n 18CrNiMo7–6 1.6587 n n 18Cr2Ni2 i MoH a See the sources in Bibliography b US steel listed in ASTM X in UNS – i f the steel number is given in brackets, then the steel has only a UNS number c European steel listed in EN 10084:2008 and in the “Stahl-Eisen-Liste”; i f the steel number is given in parentheses/brackets, the steel is only listed in the “Stahl-Eisen-Liste” d Japanese Industrial Standard e Chinese National Standard f i = identical steel to ISO steel grade; n = steel grade with closer match o f composition, but not identical; w = wider match 32 © ISO 2016 – All rights reserved ISO 683-3:2016(E) Annex C (informative) Dimensional standards applicable to products complying with this part of ISO 683 a) b) c) d) e) f) g) ISO 1035-1, Hot-rolled steel bars — Part 1: Dimensions of round bars ISO 1035-2, Hot-rolled steel bars — Part 2: Dimensions of square bars ISO 1035-3, Hot-rolled  steel  bars  —  Part  3:  Dimensions  of  flat  bars ISO 1035-4, Hot-rolled steel bars — Part 4: Tolerances ISO 7452, Hot-rolled steel plates — Tolerances on dimensions and shape ISO 16124, Steel wire rod — Dimensions and tolerances ISO 16160, Hot-rolled steel sheet products — Dimensional and shape tolerances © ISO 2016 – All rights reserved 33 ISO 683-3:2016(E) Annex D (informative) C l a s s i f i c a t i o n o f s t e e l g r a d e s a c c o r d i n g t o m i n i m u m t e n s i l e strength as a function of diameter after hardening and tempering at 200 °C T a b l e D — C l a s s i f i c a t i o n o f s t e e l g r a d e s a c c o r d i n g t o m i n i m u m t e n s i l e s t r e n g t h a s a of diameter after hardening and tempering at 200 °C Rm MPa d ≤ 16 mm 20MnCr5, 20MnCrS5, 200 17NiCrMo6–4, 18NiCr5–4, 17CrNi6–6 18CrNiMo7–6 22CrMoS3–5 18CrMo4, 100 18CrMoS4, 20NiCrMo2–2, 20NiCrMoS2–2 15NiCr13 16MnCr5, 16MnCrS5, 000 16MnCrB5 16NiCr4, 16NiCrS4 20MoCrS4 900 20MoCr4, 28Cr4, 28CrS4 16 mm < d ≤ 40 mm 600 17Cr3, 17CrS3 C16E, C16R C15E, C15R 500 400 34 C10E, C10R u n c t i o n 40 mm < d ≤ 100 mm 17NiCrMo6–4 700 C16E, C16R, 17Cr3, 17CrS3, C15E, C15R f 18NiCr5–4, 17CrNi6–6, 18CrNiMo7–6 20MnCr5, 20MnCrS5 22CrMoS3–5 18CrMo4, 18CrMoS4, 15NiCr13 16MnCr5, 16MnCrS5, 16MnCrB5, 16NiCr4, 16NiCrS4 20NiCrMo2–2, 20NiCrMoS2–2, 20MoCr4, 20MoCrS4 28Cr4, 28CrS4 800 18NiCr5–4, 17CrNi6–6, 18CrNiMo7–6, 22CrMoS3–5, 17NiCrMo6–4, 15NiCr13, 20MnCr5, 20MnCrS5 18CrMo4, 18CrMoS4, 20NiCrMo2–2, 20NiCrMoS2–2, 28Cr4, 28CrS4, 16MnCr5, 16MnCrS5, 16MnCrB5 C10E, C10R © ISO 2016 – All rights reserved ISO 683-3:2016(E) Bibliography [1] ISO 683-1, Heat-treatable steels, alloy steels and free-cutting steels — Part : Non-alloy steels for [2] ISO 683-2, Heat-treatable steels, [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] quenching and tempering· quenching and tempering alloy steels and free-cutting steels — Part 2: Alloy steels for ISO 683-4, Heat-treatable steels, alloy steels and free-cutting steels — Part 4: Free-cutting steels ISO 683-5, Heat treatable steels, alloy steels and free-cutting steels — Part 5: Nitriding steels ISO 683-14, Heat-treatable steels, alloy steels and free-cutting steels — Part 14: Hot-rolled steels for quenched and tempered springs ISO 683-18, products Heat-treatable steels, alloy steels and free-cutting steels — Part 8: Bright steel ISO 4954, Steels for cold heading and cold extruding ISO 4960, Cold-reduced carbon steel strip with a mass fraction of carbon over 0,25 % EN 10204, Metallic products — Types of inspection documents EN 10247, Micrographic examination of the non-metallic inclusion content of steels using standard pictures GB/T 5216, Structural steels subject to end-quench hardenability requirements JIS G 0415, Steel and steel products — Inspection documents JIS G 0555, Microscopic testing method for the non-metallic inclusions in steel JIS G 4052, Structural  steels  with  specified  hardenability  bands SAE J 406c, Methods of Determining Hardenability of Steels © ISO 2016 – All rights reserved 35 ISO 683 -3 : 01 6(E) I C S   7 ; 7 Price based on 35 pages © ISO 2016 – All rights reserved