Tiêu chuẩn iso 00683 2 2016

3.1 rul ng sectio se tion for w hich the spe if ied me hanical pro e ties shal a ply Not e 1 t o entry: In epen ent of the actual shape an dimensions of the c os -section of the prod ct,

Heat-treatable steels, al oy steels and

free-cut ing steels —

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written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

F reword v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 2

4 Clas ification and desig natio 3

4.1 Clas ification 3

4.2 Desig nation 3

5 Infor mation to be sup l ed b the purchaser .3

5.1 Man atory information 3

5.2 Optionsan / r sup lementary or spe ial r eq ir ements 3

5.3 Or de ing example 4

6 Manufacturin proc es 4

6.1 General 4

6.2 Deox idation 4

6.3 Heat-tr eatment con ition an surfac con ition at delve y 4

6.3.1 Heat-tr eatment condition 4

6.3.2 Particular surfac con itions 4

6.4 Trac a i ty of the cas 4

7 Req irements 5

7.1 Chemical composition, me hanical pr ope ties an hardena i ty 5

7.1.1 General 5

7.1.2 Chemical comp sition 5

7.1.3 Me hanical pr ope ties 5

7.1.4 Hardena i ty 5

7.1.5 Surfac har dnes 5

7.2 Machina i ty 5

7.3 Cold shearabi ty 5

7.4 Grain siz 6

7.5 Non-metal c inclusions

6 7.5.1 Microsco ic inclusions 6

7.5.2 Macr osco ic inclusions 6

7.6 Inte nal soun nes 6

7.7 Surfac q al ty 6

7.8 De ar burization 7

7.9 Sha e, dimensions an toleranc s 7

8 Inspection 7

8.1 Tes ing proc d r es an types of document 7

8.2 Fr eq ency of tes ing 7

8.3 Spe ific inspe tion and testing 8

8.3.1 Ve ification of the har dena i ty, har dnes an me hanical pr ope ties 8

8.3.2 Visual an dimensional inspe tion 8

9 Test metho s 8

9.1 Chemical analysis 8

9.2 Me hanical tes s 8

9.2.1 Tensie tes 8

9.2.2 Imp ct tes 8

9.3 Har dnes an har dena i ty tes s 8

9.3.1 Hardnes in tr eatment con itions +A and +S 8

9.3.2 Ve ification of hardena i ity 9

9.3.3 Surfac har dnes 9

9.4 Retes s 9

10 Mar king 9

A nne x A (normative) Rul n sectio s for mechanical pr operties 31

A nne x B (normative) Supplementary or special r equir ements

35

A nne x C (informative) Desig natio of ste ls g i ven in this part of ISO 683 and of c omparable

g rades c overed in var io s desig nation systems 37

A nne x D (informative) Dimensio al standards applcable to pr oducts c ompl ying with this

par t of ISO 683 39

Biblog raph y 40

ISO (he Int ernational Org nization for Stan ardization) is a worldwide fede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Standards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a l shed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identif ied d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

For an ex lanation on the meaning of ISO spe ific terms an ex r s ions r lat ed to conformity as es ment ,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www.iso.org iso/ for word.html

The committ ee r sp nsible for this document isISO/TC 1 , Ste l, Subcommitt ee SC 4, Heat tr ata le a d

— Part 1: No -alo s te l s fr q enchin a d tempe in

— Part 2 : Alo s te ls fr q enchin a d tempe in

— Part 3: Cas e -h rdenin s te ls

— Part 4: Fr e -c ut in s te ls

— Part 5: Nitridin s te l s

— Part 14 : Hot-roled s te l s fr q enched a d tempe ed s prin s

— Part 15: Valve s te ls fr inte n l c omb s tion en ines

— Part 17: B al a d role bearin s te ls

— Part 18: B rig t s te l produc ts

Heat-treatable steels, al oy steels and free-cutting steels —

Part 2:

This part of ISO 6 3spe if ies the t ech ical delve y r q ir ment for

— semi-f inished prod ct , hot formed, e.g blo ms, bi let , sla s ( e Not e 1),

— bars ( e Not e 1),

— wir rod,

— f inished flat prod ct , an

— hamme or dro forgings ( e Not e 1)

man factur d from the dir ct hardening alo st eels an the alo flame- an in uction-hardening

st eelslst ed in Ta le 3an sup l ed in one of the heat-tr atment con itions given for the dife ent ty es

of prod ct in Ta le 1 an in one of the surfac con itionsgiven in Ta le 2

The st eels ar , in g ene al, int en ed for the man factur of q enched an t empe ed or aust empe ed

( e 3.2 an Not e 2) an flame- or in uction-hardened machine p rt ( e Ta les8 an 9)

The r q ir ment for me hanical pro e ties given in this p rt of ISO 6 3 ar r s rict ed t o the siz s

given in the r lev nt Ta le 8

NOTE 1 Hammer -forg d semif inished prod cts (blo ms, bilets, sla s, et c.), se mles roled rings an

hammer -forg d b r are in the fol owing covered u der semif inished prod cts or b r an not u der the t erm

“hammer an drop forgings”

NOTE 2 F or the p rposes of simplif ication, the t erm “q enched an t empered” is, u les otherwise in icated,

used in the folowing also for the austempered con ition

NOTE 3 F or International Stan ards relating t o st eels complying with the req irements for the chemical

composition in Ta le 3, however, su plied in other prod ct forms or tre tment con itions than given a ove or

inten ed for special ap lications, an for other related International Stan ards, se the Biblio rap y

NOTE 4 T is part of ISO 68 do s not ap ly to bright prod cts an b r an wire rod for cold he ding For

such prod cts, se ISO 68 -1 an ISO 49 4

In spe ial cases, v riations in these t echnical del ve y r q ir ment or ad itions t o them can form the

subje t of an a r ement at the time of en uiry an orde ( e 5.2 an An ex B)

In ad ition t o this p rt of ISO 6 3, the g ene al t ech ical delve y r q ir ment of ISO 404 ar a plca le

2 Normati ve r eferences

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

ISO 148-1, Metal c mate ials — Ch rp pendulumimp c t tes t — Part 1: Tes t meth d

ISO 3 7, Stee l a d stee l produc ts — L catio a d pre paratio o samples a d tes t pie es fr me h nical tes tin

ISO 404:2 1 , Ste l a d s te l produc ts — G ene al technic al deli ve y r q ir ments

ISO 642, Ste l — Harden bi t y tes t b end q enchin (Jomin tes t)

ISO 643, Ste l s — Mic ro ra hic dete min tio o the a p r nt grain s i ze

ISO 3 8 , Ste l s — Dete min tio o depth o dec arb ri zation

ISO 48 5:—

1)

, Fe ro s produc ts — Heat tr atments — Voc ab lar y

ISO 4948-1, Ste ls — Clas s ific atio  — Part 1: Clas s ific ation o s te ls into u alo ed a d alo  s te l s b s ed 

o chemic al c omp s itio

ISO 4948- 2, Ste ls — Clas s ific ation — Part 2 : Clas s ific atio  o u alo ed a d alo  s te l s ac c ordin  to main 

q alt y clas s es a d main pro ert y or a plc atio ch rac te i s tic s

ISO/TS 4949, Ste l n mes b s ed o let e sy mb ls

ISO 49 7, Ste l — Dete min tion o c ontent o n n-metal c inclus io s — Mic ro ra hic meth d us in

s ta dard dia rams

ISO 65 6-1, Metal c mate ials — B rinel h rdnes s tes t — Part 1: Tes t meth d

ISO 65 8-1, Metal c mate ial s — R ockwel h rdnes s tes t — Part 1: Tes t meth d (sc ales A, B, C,D, E,F,G , H,

K, N, T)

ISO 68 2-1, Metal c mate ial s — Tens ile tes tin — Part 1: Meth d o tes t at ro m tempe atur

ISO 6 2 , Stee l produc ts — Voc ab lar y

ISO 77 8, Stee l — S rfc e fini sh o h t-roled plates a d w ide flats — Deli ve y r q ir ments

ISO 9443, Heat-tr ata le a d alo s te l s — S rfce q alt y clas s es fr h t-roled ro nd b rs a d w ir

rods — Te h ic al deli ve y c onditio s

ISO 1 474, Ste l a d s te l produc ts — Ins pec tio doc ument

ISO 142 4, Ste l a d iro — S mpln a d pr p ration o s amples f r the dete min tio o chemic al

c omp s itio

3 Terms and definitions

F or the purp ses of this document, the def initions in ISO 3 7, ISO 488 , ISO 4948-1, ISO 4948- 2,

ISO 6 2 , ISO 142 4, an the folowing a ply

NOTE For deviations from these terms an def initions, se Notes 1 an 2 of Clause 1

3.1

rul ng sectio

se tion for w hich the spe if ied me hanical pro e ties shal a ply

Not e 1 t o entry: In epen ent of the actual shape an dimensions of the c os -section of the prod ct, the size of its

ruling section is always given by a diamet er This cor espon s to the diameter of an “eq ivalent rou d b r” That

is a rou d b r which wil show the same co ling rate as the actualruling section of the prod ct concerned at its

position for taking the t est pieces, when b ing co led from austenitizing temperature

austempering

isothe mal heat r atment for prod cing b initic or aus e ritic s ructur of a work pie e

Note 1t o entry: T e f inal co ling to ambient emperature is not at a specif ic rate

The clas ification of the r lev nt t eel grades is ac ording t o ISO 4948-1 and ISO 4948- 2 Al st eel grades

co e ed b this part of ISO 6 3ar alo spe ial st eels

4.2 Desig nation

F or the st eel grades co e ed b this p rt of ISO 6 3, the st eel names as given in the r lev nt a les ar

alocat ed in ac ordanc with ISO/TS 4949

5 Information to be suppl ed by the purchaser

5.1 Mandator y infor mation

The man factur r shal o tain the folowing information from the pur hase at the time of en uiry

an orde :

a) q antity t o be del ve ed;

b) designation of the prod ct form ( la , blo m, bi let, rou d b r, wir rod, wide flat, she t, plat e, s rip,

forging, et c );

c) eithe the designation of the dimensional s an ard an the dimensions an t ole anc s sele t ed

from this ( e 7.9) or, for ex mple in the case of dro forgings, the designation of the drawing or any

othe document co e ing the dimensions and t ole anc s r q ir d for the prod ct ;

d) r fe enc t o this p rt of ISO 68 , i.e ISO 6 3- 2;

e) thedesignation of the st eel grade given in Ta le 3;

f) thesymb l for the r q ir d heat-tr atment con ition ( e Ta le 1, column 2);

g) s an ard designation for a t es r port 2.2 or, if r q ir d any othe ty e of inspe tion document in

ac ordanc with ISO 1 474 or ac ording t o anothe r gional s an ard, e.g EN 1 2 4 or J S G 041

5.2 Options and/ r supplementary or special requir ements

S ve al o tions ar spe if ied in thisp rt of ISO 68 an lst ed below If the pur hase does not in icat e

any of these o tions, the prod ct wi l be sup led in ac ordanc with the b sic spe if ications of this

a) if anothe surfac con ition than “hot worked” or a spe ial surfac q al ty is r q ir d, the surfac

condition ( e Ta le 2) an the surfac q al ty ( e 7.7);

b) any r q ir ment for the hardena i ity (+H, +HH, +HL) for spe ial st eels ( e 7.1.4 and Ta les5 t o 7);

c) any sup lementary r q ir ment that shal be compled with, the symb l an , w he e ne es ary, the

detai s of this sup lementary r q ir ment se Annex B);

d) any r q ir ment for the ve ification of non-metal c inclusion cont ent ( e 7.5);

e) ve if ication of hardena i ity an , if a r ed, the information a out calculation of the hardena i ty

( e 9.3.2);

f) any r q ir ment r g rding the pe mis ible depth of de arburization ( e 7.8);

g) suita i ty of bars an rod for bright drawing ( e 7.7.4);

h) any r q ir ment r lating t o the r mo al ofsurfac defe t ( e 7.7.5)

5.3 Ordering e ample

E AMP E Fif y hot-roled rou d b r ac ording t o ISO 1 3 -1 with a nominal diameter of 40 mm an a

nominal length of 8 0 0mm with diamet er tolerance ac ording t o clas S an with length t olerance ac ording to

clas L2 of ISO 1 3 -4 made of ste l grade ISO 68 -2, 42CrMo4 (se Ta le 3) in the he t-tre tment con ition +

(se Ta le 1), surface blast cle ned (+BC) (se Ta le 2), prod ct analysis/ ption B.4 with an inspection certif icate

The man facturing proc s of the st eel an of the prod ct is, with the r s rictions given b the

F or minimum r d ction ratio or minimum thicknes deformation ratio of roled an forg ed prod ct ,

se B.5

6.2 Deox idation

Al st eels shal bedeo idiz d

6.3 He t-treatment c ondition and surface c ondition at deli very

6.3.1 He t-treatment c onditio

The prod ct shal be delve ed in one of the heat-tr atment con itions given in Ta le 1, lnes 2 t o 6 as

a r ed d ring time of en uiry an orde

6.3.2 Particula surfac e c onditions

If so a r ed at the time of en uiry an orde , the prod ct shal be delve ed in one of the p rticular

surfac conditions given in Ta le 2, lnes 3t o 6

6.4 T rac eabi ity ofthe cast

Each prod ct shal be trac a le t o the cas ( e Clause 1 )

7 Requir ements

7.1 Chemical c omposition, mechanical properties and hardenabi ity

7.1.1 General

Ta le 1 shows the combinations of usual heat-tr atment con itions at delve y, prod ct forms an

r q ir ment , as spe if ied in Ta les 3 t o 9

Ex cept w he e st eels ar orde ed in the q enched an t empe ed con ition, this part of ISO 6 3 makes

for the alo ed st eelspro isions t o be sup led with or without hardena i ity r q ir ment ( e Ta le 1,

columns 8 an 9)

7.1.2 C emical c omp sitio

The chemical comp sition det ermined b cas analy sis shal comply with the v lues in Ta le 3

Pe mis ible deviationsbetween the lmiting v lues for cas analy sis an the v lues for prod ct analy sis

ar given in Ta le 4

The prod ct analy sis shal be car ied out w hen spe if ied at he time of the en uiry an orde ( e B.4)

7.1.3 Mechanical properties

Whe e the st eel is orde ed without hardena i ty r q ir ment , the r q ir ment for me hanical

pro e ties spe if ied in Ta les 7 or 8 a ply asa pro riat e for the particular heat tr atment con ition

In this case, the hardena i ity v lues given in Ta le 5 ar for guidanc purp ses only

The me hanical pro e ty v lues given in Ta le 8 a ply t o t es pie es in the q enched an t empe ed

con ition, w hich ha e be n taken an pr p r d in ac ordanc with Figur 2 or Figur s 3 an 4 ( e also

fo tnot e a t o Ta le 1)

7.1.4 Hardenabiity

Whe e the st eel is orde ed using the designations given in Ta le 5 or 6 t o normal ( e Ta le 5) or t o

nar owed ( e Ta le 6) hardena i ty r q ir ment , the v lues of hardena i ity given in Ta le 5 or 6,

r spe tively a ply in ad ition t o the r q ir ment cit ed in Ta le 1, columns 9.1 and 9.2 ( e fo tnot e b

t o Ta le 3)

7.1.5 Surfac e har dnes

F r the surfac hard es of al o s e ls af e flame or in uction hardening, the spe if ications in

Al st eels ar machina le in the con ition “ of an ealed” Whe e impro ed machina i ity is r q ir d,

grades with a spe if ied sulfur rang e an / r with a spe ific tr atment should be orde ed t o impro e

machina i ty ( e also Ta le 1, l ne 6)

7.3 Cold shearabi ity

7.3.1 Un e suita le shearing con itions (a voiding local s r es peaks, pr eheating , a plcation of blades

with a pr ofie ada ted to that of the pr od ct , etc.) al s e ls ar e cold shearable in the sof an ealed (+A )

con ition

7.3.2 Ste l g rades 34Cr4, 37 r4, 41 r4, 2 CrMo4, 34CrMo4, 42 rMo4 an 41 rNiMo with ma imum

and spe ified rang e S-content , b r on-alo s e l g rades 3 MnCrB5-2 an 3 MnCrB6-2 and the

corr esp n ing +H, +HH an +HL g r ades ( e Ta les 3 an 5 to 7) ar e, u de suitable con itions, also cold

shearable when being delver ed in the con ition “ tr eated to impr ove shearabi ty (+S) w ith the har dnes

req irement g iven in Ta le 7

7.3.3 Un e suita le conditions, s e l g rades 2 Mn 5, 3 Mn 5, 3 Mn 5 an 2 MnCrB5-2, an

the corr esp n ing g r ades with r eq ir ements on hardena i ty ( e Ta le 5), ar e cold shearable in the

u tr eated con ition

7.4 Grain size

Al st eels shal ha e a f ine grain s ructur with an a ust enit e grain siz of 5 or fine w hen t est ed in

ac ordanc with ISO 643 F or ve if ication, se B.2

7.5 Non-metal ic inclusions

7.5.1 Micr osc opic inclusio s

The spe ial st eels shal ha e a c rtain degr e ofcleannes ; howeve , ve ification of the non-metal ic

inclusion cont ent r q ir s a spe ial a r ement If the e is such an a r ement at the time of en uiry

an orde , the mic osco ic non-metal ic inclusion cont ent hal be det ermined t o an a r ed proc d r

an within a r ed lmit in ac ordanc with ISO 49 7 or anothe s an ard, e.g r gional s an ards

EN 1 247 or J S G0 5

F or grades with spe if ied minimum sulfur cont ent, the a r ement hould not inclu e sulfides

7.5.2 Macrosc opic inclusions

This r q ir ment is a plca le t o the ve ification of the mac osco ic inclusions in spe ial st eels If

ve ification is a r ed, the method an ac eptanc lmit shal be a r ed at the time of en uiry and orde

7.6 Internal soundnes

Whe e a pro riat e, r q ir ment r lating t o the int ernal sou dnes of the prod ct shal be a r ed at

the timeof en uiry an orde ( e B.3)

7.7 Sur fac e qual ty

7.7.1 A ll pr oducts shal ha ve a smo th surfac finish a pr opriate to the man facturing pr oc s a pled

7.7.2 Minor surfac impe fe tions, which ma y oc ur also u de normal manufacturing con itions,

such as print orig inating fr om r oled-in scale, ar e not o be r egar ded as defe t

7.7.3 Barsan wir e r od shal be delver ed with surfac clas 1za ac ording to ISO 94 3 and hot-roled

plates an w ide flat ar e delver ed with a surfac ac or ding ISO 7 88 u les othe wise ag reed at he time

of en uiry and or de

Whe e no Int ernational Stan ard on the surfac q al ty of st eel prod ct exis s, detaied r q ir ment

r fe ring t o this charact eris ic shal, w he e a pro riat e, be a r ed at the time of en uiry an orde

It is mor diff icult t o det ect an elminat e surfac discontin ities from coied prod ct than from cut

lengths This should be taken int o ac ount w hen a r ement on surfac q al ty ar made

7.7.4 If suitabi ty of b rs an r od for bright drawing is r eq ir ed, this shal be ag r eed at the time of

enq iry an or de

7.7.5 T e r emo al of surfac defe ts b welding shal only be pe mitted with the a pr ov l of the

cus ome or his/he representative

If surfac discontin ities ar r p ir d, the method an ma imum depth of r mo al shal be a r ed at

the timeof en uiry and orde

7.9 Shape, dimensions and toleranc es

The sha e, dimensions an t ole anc s of the prod ct shal comply with the r q ir ment a r ed at

the time of en uiry and orde The a r ement shal , as far as p s ible, be b sed on cor esp n ing

Int ernational Stan ards ( e Annex D);othe wise on suita le national s an ards

8.1 Testing pr oc edur es and types of documents

8.1.1 Pr od ct complying with this part of ISO 6 3 shal be or dered an delver ed with one of the

inspe tion document as spe ified in ISO 1 474 or anothe stan ar d, e.g r eg ional s an ards EN 1 2 4

or J S G 041 The type of document shal be ag r eed up n at the time of enq iry an or de If the or de

does not contain any spe ification of this type, a tes r ep rt 2.2 shal be is ued

8.1.2 If, in ac ordanc with the ag reements made at the time of en uiry and or de , a tes r ep rt 2.2 is

to be pr ovided, this shal co e the folowing information:

a) conf irmation that he mat erial comples with the r q ir ment of the orde ;

b) r sult of the cas analy sis for al element spe if ied in Ta le 3 for the st eel grade conc rned

8.1.3 If, in ac ordanc w ith the ag r eement in the orde , an inspe tion c rtificate 3.1 or 3.2, is to be

pr ovided, the spe ific inspe tions and tes s desc ibed in 8.3 an Clause 9 shal be car ied out an the

r esult shal be confirmed in the inspe tion c rtificate

In ad ition, the inspe tion c rtif icat e shal co e :

a) conf irmation that he mat erial comples with the r q ir ment of the orde ;

b) r sult of the cas analy sis for al element spe if ied in Ta le 3 for the st eel grade conc rned;

c) r sult of al inspe tions an t es s orde ed b sup lementary r q ir ment ( e An ex B);

d) the symbol, let e s or n mbe s r lating the inspe tion c rtif icate, tes pie es an prod ct to

each othe

8.2 F r equency of testing

The amount of t es ing, the sampl ng con itions an the t es methodst o be a pled for the ve ification of

the r q ir ment shal be in ac ordanc with the pr sc iptions of Ta le 1

8.3 Specific inspection and testing

8.3.1 Ver ificatio of the har denabiity, hardnes and mechanical properties

F or st eels being orde ed without hardena i ty r q ir ment , i.e without the symb l, +H, +HH or +HL

in the designation, the hardnes r q ir ment or me hanical pro e ties given for the r lev nt

heat-tr atment con ition in Ta le 1, column 8, subcolumn 8.2, shal , with the folowing ex ception, be ve if ied

The r q ir ment given in fo tnot e of Ta le 1 (me hanical pro e ties of r fe enc t es pie es), shal

only be ve ified if sup lementary r q ir ment pe if ied in B.1 is orde ed

F or st eels being orde ed with the symb l +H, +HH or +HL in the designation ( e Ta les 5 an 6), u les

othe wise a r ed, only the hardena i ity r q ir ment ac ording t o Ta le 5 or 6 ar t o be verif ied

8.3.2 Visual and dimensio al inspectio

A sufficient n mbe of prod ct shal be inspe t ed t o ensur the compl anc with the spe if ication

9.1 Chemical anal ysis

The choic ofa suita le phy sical or chemical analytical method for the analy sis shal be at the disc etion

of the man factur r In cases of disput e, the method for prod ct analy sis used shal be a r ed taking

int o ac ou t her lev nt exis ing Int ernational Stan ards

NOTE T e list of availa le Int ernational Stan ards on chemical analy sis is given in ISO/TR 97 69

9.2 Mechanical tests

9.2.1 Tensie test

The t ensie t es shal be car ied out in ac ordanc with ISO 6 9 -1

F or the spe ified yield s r ngth in theta les on me hanical pro e ties in this p rt of ISO 6 3, the uppe

yield s r ngth, R

eH, shal be det ermined

If a yield phenomenon is not pr sent, the 0,2 % pro f s r ngth, R

p0,2, shal be det ermined

9.2.2 Impact test

Theimp ct t es shal be car ied out in ac ordanc with ISO 148-1

A t the time of enq iry an orde , ad itional r q ir ment conc rning the imp ct ene g an the

ve if ication at t empe atur s othe than ro m t empe atur (0 °C, – 20 °Can –40 °C)can be a r ed

NOTE Impact values at lower temperatures can ot b achieved for al st eelgrades

The a e ag e v lues of a set of thr e t es pie es shal be eq al t o or gr at er than the spe ified v lue One

in ivid al v lue ma be below thespe if ied v lue, pro ided it is not les than 7 % of that v lue

If these con itions ar not satisfied, ad itional t es s can be done ac ording t o ISO 404:2 1 , 8.3.4.2

9.3 Hardnes and hardenabi ity tests

9.3.1 Har dnes in treatment c onditions +A and +S

F or prod ct in tr atment con itions +A ( of an ealed) an +S ( r at ed t o impro e sheara i ty), the

hard es shal be measur d in ac ordanc with ISO 6 06-1

9.3.2 Ver ificatio of har denabi ity

Wheneve a aia le, the man factur r has the o tion t o ve ify the hardena i ty b calculation The

calculation method is lef t o the disc etion of the man factur r If a r ed at the time of en uiry an

orde , the man factur r shal give suff icient information a out the calculation for the cust ome t o

conf irm the r sult

If a calculation formula is not a ai a le or in the case of disput e, an en q ench hardena i ty t es

shal be car ied out in ac ordanc with ISO 642 The t empe atur for q enching shal comply with the

r lev nt ta les in this part of ISO 6 3 The hardnes v lues shal be det ermined in ac ordanc with

ISO 6 08-1, scale C

9.3.3 Surfac e har dnes

The surfac hard es of st eels aft er flame an in uction hardening ( e Ta le 9)shal be det ermined in

ac ordanc with ISO 6 08-1, scale C

9.4 Retests

R et es s for st eels for q enching an t empe ing an c it eria ar spe ified in ISO 404

10 Mar king

The man factur r shal mark theprod ct or the bun les or b x es containing theprod ct in a suita le

wa , so that the identif ication of the cas , the st eel ty e an the origin of the delve y is pos ible

Table 1 — C mbinatio s of usual he t-tre tment co ditio s at del very, prod ct forms and

req irements ac ording to Tables 3 to 9

Ap lca le r q ir ment if the st eel is orde ed

with the desig atio given in

S mi

finished

pro

-uctBarsWir

roFlat

Other tre tment con itions, for e ample certain an e lng con itions to achiev e a certain structure, may b

a re d at the time of en uiry an order T e con ition “an e led to achiev e a sp eroidization of the carbides”,

as req ired for cold he ding n cold e trusion, is cov ered in ISO 49 4

a

T e mechanical properties specif ied in Ta le 8 for the q enched an tempered con ition shal b achieva le after

ap ropriate he t tre tment, if so a re d at the time of en uiry an order ( for reference test pieces, se B.1)

Table 2 — Surface co ditio at delvery

Unti the term “ ou h ma hined” is def ined b , for e ample ma hinin alowanc s, the detais are to be agre d at the

time of en uiry an order

c

In ad ition, it may be agre d that he prod ct be oied or, where ap ropriate, lmed or p osp ated

Table 3— Steel grades and chemical compositio (ap l cable to cast analy sis)

NO E Element not q oted shal not be intentionaly ad ed to the s e l without he agre ment of the p rchaser, other than

for the p rpose of finishin the he t Al re sonable pre autions should be tak en to prevent he ad ition, fom scrap or other

material used in man fa ture, of such element , which afe t he hardenabi ty, me hanic l proper ies an ap lc bi ty

a

In the c se of grades with spe ified hardenabi ty req irement (e Tables 5 an 6), ex cept or p osp orus an sulfur,

insig ific nt deviations fom the lmit for c s analysis are permis ible;these deviations shal, however, not e c ed in the

c se of c rbon ± ,01% an in al other c ses, the values a c rdin to Table 4

b

Ste ls with improved ma hinabi ty either b hig er sulfur levels u to about 0,10 % S (inclu in c nt oled sulf ide

morp olog ) or le d ad itions may be avaiable on req es In the fir t c se, the u per lmit of the Mn-c ntent may be

NO E Element not q oted shal not be intentionaly ad ed to the s e l without he agre ment of the p rchaser, other than

for the p rpose of f inishin the he t Al re sonable pre autions should be tak en to prevent he ad ition, fom scrap or other

material used in man fa ture, of such element , which afe t he hardenabi ty, me hanic l proper ies an ap lc bi ty

a

In the c se of grades with spe ified hardenabi ty req irement (e Tables 5 an 6), e c pt or p osp orus an sulfur,

insig ific nt deviations fom the lmit for c s analysis are permis ible;these deviations shal, however, not e c ed in the

c se of c rbon ± ,01% an in al other c ses, the values a c rdin to Table 4

b

Ste ls with improved ma hinabi ty either b hig er sulfur levels u to about 0,10 % S (inclu in c nt oled sulf ide

morp olog ) or le d ad itions may be avaiable on req es In the fir t c se, the u per lmit of the Mn-c ntent may be

incre sed b 0,1 %

c

Ma imum values u les otherwise s ated

d

Ste ls may be su pled with a low er si c n c ntent In this c se, alternative me ns of de xidation shal be used

Table 3 (c ontin ed)

Table 4 — Permis ible deviatio s betwe n the pro uct analy sis and the lmiting values given

Element Pe mis ible ma imum cont ent

ac ording t o cas analy sis

± me ns that in one c s the deviation may o cur over the u per value or u der the lower value of

the spe if ied ran e in Table 3, b t not both at he same time

Table 5 — Hardnes lmits for steel grades with specified (normal hardenabiity (+H grades;

Table 7 — Maximum hardnes for pro ucts del vered in the co ditio s “ re ted to impro e

she rabi ity” (+S) or “sof anne led” (+A)

e

—f

e

—f

e

—f

The values ap ly also to the various hardenabi ty (+H, +HH an +HL) grades c vered in Tables 5

an 6;se fo tnote d for c n itions

b

The values are not ap lc ble toc ntin ously c s an not ur her deformed slabs

c

Depen in on chemic l c mposition an on dimensions, par icularly in the c se of the +HH grades,

sof an e ln may be ne es ary

Zb

min

Zb

min

Zb

min

Zb

min

Zb

= , ; se Table 1 , column 7 , lne T 4); Z is the red cion in cos -sec ion on fac ure

K 2: imp c s rength of longitu inal Charp V-noth tes pieces with s iker radius 2 mm; av era e of 3 in ivid al v lues, no in ivid al v lue shalb low er than 7 % of the minimum av era e v lue

Zb

min

Zb

min

Zb

min

Zb

min

Zb

= , ; se Table 1 , column 7 , lne T 4); Z is the red cion in cos -sec ion on fac ure

K 2: imp c s rength of longitu inal Charp V-noth tes pieces with s iker radius 2 mm; av era e of 3 in ivid al v lues, no in ivid al v lue shalb low er than 7 % of the minimum av era e v lue