Tiêu chuẩn iso 00683 1 2016

Heat-treatable steels, al oy steels and free-cutting steels —Part 1: 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.. 5

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 2

3 Terms an definitions 3

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 4

5.3 Or de ing example 4

6 Manufacturin proc es 4

6.1 General 4

6.2 Deox idation 5

6.3 Heat-tr eatment con ition an surfac con ition at delve y 5

6.3.1 Normal con ition at delve y 5

6.3.2 Particular heat-tr eatment con ition 5

6.3.3 Particular surfac con itions 5

6.4 Trac a i ty of the cas 5

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 6

7.1.5 Surfac har dnes 6

7.2 Machina i ty 6

7.3 Cold shearabi ty 6

7.4 Grain siz

6 7.5 Non-metal c inclusions 7

7.5.1 Microsco ic inclusions 7

7.5.2 Macr osco ic inclusions 7

7.6 Inte nal soun nes 7

7.7 Surfac q al ty 7

7.8 De ar burization 7

7.9 Sha e, dimensions an toleranc s 8

8 Inspection 8

8.1 Tes ing proc d r es an types of document 8

8.2 Fr eq ency of tes ing 8

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 9

9 Test metho s 9

9.1 Chemical analysis 9

9.2 Me hanical tes s 9

9.2.1 Tensie tes 9

9.2.2 Imp ct tes 9

9.3 Har dnes an har dena i ty tes s 9

9.3.1 Hardnes in tr eatment con itions +A and +S 9

9.3.2 Ve ification of hardena i ity 9

9.3.3 Surfac har dnes 9

A nne x B (normative) Supplementary or special r equir ements 34

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 36

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

par t of ISO 683 38

Biblog raph y 39

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 1:

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 non-alo st eels an the non-alo flame- an in

uction-hardening st eels lst ed in Ta le 3 an sup led in one ofthe heat-tr atment con itions given for the

dife ent y es of prod ct in Ta le 1 an in one of the surfac con itions given 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 3.2and Not e 2) an flame- or ind ction-hardened machine part ( e Ta les 9 an 1 ), but can also

be p rtly used in the normalz d con ition ( e Ta le 1 )

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 Ta les 9 an 1

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 folowing, 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 betwe n the man factur r an pur hase at the time of en uiry an orde

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 referenc es

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 ial s — Ch rp pendulum imp 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 4948-1:1 8 , Ste ls — Clas s ific atio  — Part 1: Clas s ific atio  o s te l s into u alo ed a d alo  s te ls 

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 mtempe 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

ISO 1 2 5, Metal c mate ials — Co ve s io o h rdnes s v lues

3 Terms and definitions

F or the purp ses of this document, the t erms an definitions given in ISO 3 7, ISO 48 5, ISO 4948-1,

ISO 4948- 2, ISO 6 2 , an ISO 14284 an the folowing a ply

NOTE F or 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 ified me hanical pro e ties a ply

Note 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 diameter This cor espon s t o the diamet er 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 actual ruling section of the prod ct concerned at its

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

3.2

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 if ication of the r lev nt st eel grades is ac ording t o ISO 4948-1 an ISO 4948- 2 St eel grades

C2 , C 5, C40, C45, C 0, C 5 an C 0 ar non-alo q al ty st eels Al othe st eel grades co e ed b this

p rt of ISO 6 3ar non-alo spe ial st eels

4.2 Desig nation

F or the st eel grades co e ed b this part of ISO 68 , 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 ;

2) Un er preparation.Stag e at he time of p blication: ISO/DIS 48 5:2 16

d) r fe enc t o this p rt of ISO 68 , i.e ISO 6 3-1;

e) designation of the st eel grade, as given in Ta le 3;

f) 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 anothe s an ard (e.g r gional s an ards EN1 2 4 or J S G 041 )

5.2 Options and/ r supplementar y or special requirements

S veral 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 l ed in ac ordanc with the b sic spe if ications def ined

in this p rt of ISO 68 ( e 5.1):

a) if a heat-tr atment con ition othe than the u tr at ed con ition is r q ir d, the symb l for this

othe con ition ( e Ta le 1, column 2);

b) 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);

c) 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);

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

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

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

f) 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);

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

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

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

j) hard es t es ing inst ead of t ensie t es ing for normalz d f inished flat prod ct in

thick es es > 0 mm for plat es or > 0 mm for b rs ( e 7.1.3) ( in this case, hard es lmit should

be a r ed)

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 0 mm,with diameter t olerance ac ording to clas S an with length t olerance ac ording t o

clas L2 of ISO 1 3 -4 made of st eel grade ISO 68 -1, C 5E (se Ta le 3)in the he t re tment con ition +N (se

Ta le 1), surface blast cle ned (+B )(se Ta le 2), prod ct analy sis/ ption B.5 with an inspection certif icat e 3.1

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

r q ir ment in 6.2 t o 6.4 lef t o the disc etion of the man factur r

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

se B.6

6.2 Deox idation

Al st eels shal be deo idiz d

6.3 He t-treatment c ondition and surfac e c ondition at deli ver y

6.3.1 Nor mal c ondition at deli ver y

Unles othe wise a r ed at the time of enq iry an orde , the prod ct shal be del ve ed in the

untr at ed, i.e hot-worked con ition

6.3.2 Par ticular he t-tr eatment c onditio

If so a r ed at he time of en uiry an orde , the prod ct shal be del ve ed in one of the heat-tr atment

con itions given in Ta le 1, l nes 3 t o 7

6.3.3 Par ticular surface c onditions

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

surfac con itions given in Ta le 2, l nes 3 t o 6

6.4 Trac eabi ity ofthe cast

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

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 ified in Ta les 3 t o 1

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 st eel ty es 2 Mn6, 2 Mn6, 3 Mn6 an 42Mn6, an for the non-alo spe ial st eels with carb n

cont ent eq al t o or highe than the cont ent of ty e C 5 pro isions t o be sup led with or without

hardena i ity r q ir ment ( e Ta le 1, columns 8an 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.5)

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 ified in Ta les 8, 9 or 1 a ply as a pro riat e for the p rticular heat-tr atment condition

In this case, the hardena i ity v lues given in

Ta le 5 for spe ial st eels ar for guidanc purposes only

The me hanical pro e ty v lues given in Ta les 9 an 1 a ply t o t es pie es in the q enched an

t empe ed or normalz d con ition, w hich ha e be n taken an pr par d in ac ordanc with Figur 2 or

F or st eel plat es of thicknes > 0 mm an b rs > 0 mm in diamet er in the normal z d condition (+N),

it ma be a r ed at the time of en uiry an orde that inst ead of the t ensi e t es , the hard es t es

is pe formed at the same r gion w he e the sample for the t ensi e t es pie e would be taken from

The hardnes t es should be pe formed an , from this, the t ensi e s r ngth v lues can be calculat ed

ac ording t o ISO 1 2 5 The calculat ed t ensie s r ngth shal comply with Ta le 1

7.1.4 Har denabiity

Whe e the st eel is orde ed using the designations given in Ta le 5, 6 or 7 t o normal ( e Ta le 5) or

t o nar owed ( e Ta les 6 an 7) hardena i ty r q ir ment , the v lues of hardena i ity given in

Ta le 5, 6 or 7, r spe tively, a ply in ad ition t o the r q ir ment cit ed in Ta le 1, columns 9.1 an 9.2

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 if ic tr atment should be orde ed t o impro e

machina i ty ( e also Ta le 1, l ne 7)

7.3 Cold shearabi ity

7.3.1 Un e suitable 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 product , etc.), al s e ls ar e cold shearable in the sof an ealed (+A )

con ition

7.3.2 Ste l g rades C45, C5 , C 5, C 0, 2 Mn6, 3 Mn6 an 42Mn6 an the corr esponding E-, R-, +H-,

+HH- an +HL g rades ( e Ta les 3 an 5 to 7) are, u de suita le con itions, also cold shearable when

being delver ed in the con ition “ tr eated to impr ove shearabi ty (+S) with the hardnes req irement

g iven in Ta le 8

7.3.3 Ste ls C 5, C 0, C3 , C40 an 2 Mn6 an the corr esp n ing E-, R-, +H-, +HH- and +HL-g rades

( e Ta les 3 an 5 to 7) ar e, u de suitable con itions, cold shearable when being delvered in the

u tr eated con ition

Cold sheara lty ma also be as umed for the v rious gradesof st eel C45, in siz s of 80 mm an gr at er

in the u tr at ed con ition

7.4 Grain size

Unles othe wise a r ed at the time of en uiry an orde , the grain siz shal be lef t o the disc etion of

the man factur r If a finegrain s ructur is r q ir d in ac ordanc with a r fe enc tr atment, spe ial

r q ir ment B.3 shal be orde ed

If st eels C 5E, C 5R, C45E, C45R, C 0E, C 0R, C5 E an C5 R ar int en ed for flame or in uction

hardening, spe ial r q ir ment B.3 shal be orde ed in any case

7.5 Non-metal ic inclusions

7.5.1 Microsc opic inclusio s

The spe ial st eels shal ha e a c rtain degr e of cleannes ; 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 shal be det ermined t o an a r ed proc d r

an within a r ed l mit 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 G 0 5 )

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

7.5.2 Macr osc 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 in uiry an orde ( e B.4)

7.7 Surface qual ty

7.7.1 A ll pr od ct shal ha ve a smo th surfac finish a pr opriate to the man facturing pr oc s es

a pled

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

such as prints orig inating fr om r oled-in scale, ar e not to be r egar ded as defe ts

7.7.3 Bars an wir e r od shal be delver ed with surfac clas 1za ac or ding to ISO 94 3 and hot-r oled

plates an w ide flats shal be delver ed with surfac ac ording to ISO 7 8 , u les othe wise ag r eed at

the 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 el minat 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 suita i ty of b rs an rod for bright drawing is r eq ir ed, this shal be ag r eed at the time of

enq iry an orde

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 proc edures and types of documents

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

inspe tion document as spe ified in ISO 10474 (or ac ording to anothe r eg ional stan ar d, e.g EN 1 2 4

or J S G 041 ) The type of document shal be ag reed up n at the time of en uiry an orde If the orde

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 or danc w ith the ag r eement 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 folow ing information:

a) confirmation that the mat erial comples with the r q ir ment of the orde ;

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

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

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

results shal be confirmed in the inspe tion c rtificate

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

a) confirmation that the mat erial comples with the r q ir ment of the orde ,

b) r sult of the cas analy sisfor 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), an

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 Frequency 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 if ication of

the r q ir ment shal be in ac ordanc with the r q ir ment 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 a of Ta le 1 (me hanical pro e ties of r fe enc t es pie es), shal

only be ve ified if a sup lementary r q ir ment spe if ied in B.1 or B.2 isorde ed

F or st eels being orde ed with the symb l +H, +HH or +HL in the designation ( e Ta les 5 t o 7), u les

othe wise a r ed, only the hardena i ity r q ir ment ac ording t o Ta les 5, 6 or 7ar t o be ve ified

8.3.2 Visual and dimensio al inspectio

A suff icient n mbe of prod ct shal be inspe t ed t o ensur complanc with the spe if ication

9.1 Chemical anal ysis

The choic of a 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 ther lev nt exis ing Int ernational Stan ards

NOTE T e list of availa le International Stan ards on chemical analysis 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 if ied yield s r ngth in the ta les of me hanical pro e tiesin this p rt of ISO 6 3, the up e

yield s r ngth, R

eH, shal be det ermined

If a yield phenomenon is not pr sent, the0,2 % pro f s r ngth, R

p0,2, shal be det ermined

9.2.2 Impact test

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

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 if ied v lue One

in ivid al v lue ma be below the spe ified v lue, pro ided it is not les than 7 % of that v lue

If these conditions ar not atisf ied, ad itional t es s can be done ac ording t o ISO 404:2 1 , 8.3.4.2

9.3 Har dnes and hardenabi ity tests

9.3.1 Hardnes 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 hardnes of st eels aft er flame an in uction hardening ( e Ta le 1 ) shal be det ermined

in ac ordanc with ISO 6 0 -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 if ied in ISO 404

10 Mar king

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

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

( e B.7)

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

requirements as specified in Tables 3to 1

Ap lica le req irements if the ste l is ordered

with the designation given in

roFlat

Other tre tment con itions, for e ample certain an e ling con itions t o achieve a certain

structure, ma b a re d at he time of en uiry an order T e con ition “an e led to achieve a

spheroidization of the carbides”, as req ired for cold he ding an cold e trusion, is covered in

ISO 49 4

a

T e mechanical pro erties sp cif ied in Ta le 9 for the q enched an t emp red con ition an in Ta le 1 for

the normalized con ition shal b achie a le aft er a pro riat e he t re tment, if so a re d at he time of en uiry

an order (for reference test pieces, se B.1 an B.2)

b

Normalizing ma b re laced b normalizing forming

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 comp sition (appl 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 if ied hardenabi ty req irement (e Tables 5 to7), 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 toabout 0,10 % S (inclu in c nt oled sulp ide

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

1,3 to

1,65

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 to 7), 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 toabout 0,10 % S (inclu in c nt oled sulp ide

morp olog ) or le d ad itions may e avaiable on req es In the f ir t c se, the u per lmit or the man anese c ntent may

be incre sed b 0,1 %

c

Ma imum values u les otherwise in ic ted

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 6 — Values for the C-s ale Rockwel hardnes l mits for special steels with nar owed

hardenabiity s atterbands (+HH and +HL grades)

aValues of h rdnes HRC at a dis anc , in mi lme-

tr s, from quenched en oft es pie e of

+H me ns nar owed hardenabi ty sc terban on u per lmit values, +HL me ns nar owed

hardenabi ty sc terban on lower lmit values Ex mple: C 5E +HH4 me ns hard es with nar ow ed

hardenabi ty sc terban on u per lmit values fom 4 1 to 6 are given 4 mm fom the en of the

q enched tes pie e

Table 7 — Hardnes l mits for the C-s ale Rockwel hardnes for steels with a mang nese rang e

of 1,30 to 1,65 % and with nar owed hardenabiity s atterbands (+HH and +HL grades)

Table 8 — Maximum hardnes for prod cts delvered in the co ditio s ‘tre ted to improve

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

The values ap ly also for the various hardenabi ty (+H-, +H - an +HL- ) grades

c vered in Tables 5to7; se , how ever, fo tnote d

Depen in on chemic l c mposition an on dimensions, par icularly in the c se

of the +H grades, sof an e ln may be ne es ary

Table 7 (c ontin ed)

2R

KV

2R

KV

2R

K

2

MPac

m:tensie s ren th;A is the perc ntage elon ation afer f a ture (L S

in ivid al values, no in ivid al value shal be lower than 7 % of the minimum average value

2R

KV

2R

KV

2R

K

2

MPac

5 0t o

65e2e

m:tensie s ren th;A is the perc ntage elon ation afer f a ture (L S

in ivid al values, no in ivid al value shal be lower than 7 % of the minimum average value