Tiêu chuẩn iso 00683 4 2016

© ISO 2016 Heat treatable steels, alloy steels and free cutting steels — Part 4 Free cutting steels Aciers pour traitement thermique, aciers alliés et aciers pour décolletage — Partie 4 Aciers pour dé[.]

Heat-treatable steels, al oy steels and

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© ISO 2016, P blshed in Sw itz rlan

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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 i v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 2

4 Clas ification and desig natio 2

4.1 Clas ification 2

4.2 Desig nation 2

5 Infor mation to be sup l ed b the purchaser .2

5.1 Man atory information 2

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

5.3 Or de ing example 3

6 Manufacturin proc es 3

6.1 General 3

6.2 Heat r eatment an surfac con ition at delve y 3

6.2.1 Normal con ition at delve y 3

6.2.2 Particular heat-tr eatment con ition 3

6.3 Trac a i ty of the cas 3

7 Req irements 4

7.1 Chemical composition, hardnes , an me hanical pr ope ties 4

7.1.1 General 4

7.1.2 Chemical comp sition 4

7.1.3 Me hanical pr ope ties 4

7.2 Machina i ty 4

7.3 Welda i ty 4

7.4 Grain siz 4

7.5 Inte nal soun nes 4

7.6 Surfac q al ty 5

7.7 Sha e, dimensions, an toleranc s 5

8 Inspection 5

8.1 Tes ing proc d r es an types of document 5

8.2 Fr eq ency of tes ing 6

8.3 Spe ific inspe tion and testing 6

8.3.1 Ve ification of the har dnes an me hanical pr ope ties 6

8.3.2 Visual an dimensional inspe tion 6

9 Test metho s 6

9.1 Chemical analysis

6 9.2 Har dnes an me hanical tes s 6

9.2.1 Hardnes 6

9.2.2 Me hanical tes s 6

9.3 Retes s 6

10 Mar king 7

A nne x A (normative) Rul n sectio s for mechanical proper ties 14

A nne x B (normative) Supplementar y or special r equirements 17

A nne x C (informative) Desig natio of ste ls g i ven in this par t of ISO 683 and of comparable g rades c overed in vario s desig nation systems 19

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

part of ISO 683 20

Biblog raphy 21

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

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards 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 lshed 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 identified 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 t erms an ex r s ions r lated 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 ls fr q enchin a d temperin

— Part 2 : Alo s te l s fr q enchin a d temperin

— Part 3 : Case-h rdenin s te l s

— Part 4 : Fr e -c ut in s te l s

— Part 5: Nitridin s te ls

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

— Part 15: Valve s te l s fr inte n l c omb s tio 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 4:

This p rt of ISO 68 gives the t ech ical del ve y r q ir ment for semi-finished prod ct (e.g blo ms,

bi let , sla s), b rs an wir rod, man factur d from the fr e-cut ing st eels l st ed in Ta le 2 an sup led

in one ofthe tr atment con itions given for the dife ent ty es of prod ct in Ta le 1, row s 2 t o 4

This part of ISO 6 3 co e s thr e groups of fr e-cut ing st eels for me hanical purp ses as lst ed in

Ta le 2, namely

a) not int en ed for heat tr atment,

b) suita le for case-hardening, an

c) suita le for q enching an t empe ing

Fr e-cut ing st eels ar oft en used as bright bars F or these prod ct , r fe t o ISO 6 3-1

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 3 7, Stee l a d s te e l products — L catio a d pre paratio o samples a d tes t pie ces fr me ch nical tes tin

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

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

ISO 48 5, Fe ro s produc ts — Heat tr atments — Voc ab lary

ISO 4948-1, Ste l s — Clas s ific atio  — Part 1: Clas s ific atio  o s te l s 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 atio  — 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 charac te i s tic s

ISO 6 0 -1, Metal c mate ials — B rinel h rdnes s tes t — Part 1: Tes t meth d

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

ISO 6 2 , Ste l produc ts — Voc ab lary

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

rods — Technic al deli ver y c onditions

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/TR 9769, Ste l a d iro — R ev iew o a aia le meth ds o a alys i s

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

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 29, ISO 142 4 an the folowing a ply

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

3.2

fre -cut ing steels

st eels charact eriz d b g ood machina i ity with high metal r mo al rat e, mos ly o tained b highe

than normal cont ent of sulph r

Not e 1t o entry: Other elements b sides sulfur can b ad ed for further improving the machina ility

4 Clas ification and desig nation

4.1 Clas ification

The clas ification of the r lev nt st eel grades isalocat ed in ac ordanc with ISO 4948-1 an ISO 4948- 2

Al st eels co e ed b this p rt of ISO 6 3 ar clas if ied as non-alo q al ty 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 given in the r lev nt ta 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) theq antity t o be delve ed;

b) thedesignation of the prod ct form (e.g sla , blo m, bi let, roun bar, wir rod);

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

this ( e 7.7) or the designation of the drawing or any othe document, co e ing the dimensions

an t ole anc sr q ir d for the prod ct ;

d) a r fe enc t o this p rt of ISO 6 3, i.e ISO 68 -4;

e) thedesignation of the st eel grade given in Ta le 2;

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

5.2 Options/supplementary or special r equirements

A n mbe of o tions ar spe ified in this p rt of ISO 68 an lst ed below If the pur hase does not

in icat e the wish t o implement any of these o tions, the prod ct wi be sup led in ac ordanc with

the b sic spe ification of this part of ISO 6 3( 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) Any sup lementary r q ir ment that shal comply 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)

c) Suita i ty of b rs an rod for bright drawing ( e 7.6.4)

d) Any r q ir ment r lating t o r mo al of surfac defe t ( e 7.6.5)

5.3 Ordering example

E AMP E 5 hot-rol ed rou d b r ac ording t o ISO 1 3 -1, with a nominal diamet er of 40 mm an a

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

ISO 1 3 -4, clas L2, made of ste l grade ISO 68 -4, 3 S 0(se Ta le 2) in the he t-tre tment con ition +U (se

Ta le 1), prod ct analysis/ ption (se B.5) with a test report 2.2in ac ordance with ISO 1 474

5 rou d b rs ISO 1 3 – 4 ,0S × 8 0 0 2

st eel grade ISO 6 3-4 – 3 S2 o tion B.5

Inspe tion document ISO 1 4 4 – 2.2

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 an 6.3, 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 He t treatment and sur fac e c ondition at deli very

6.2.1 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 con ition that means “as hot-worked”

6.2.2 Par ticular he t-tr eatment c onditio

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

heat-tr atment con itions given in Ta le1, rows 3an 4

6.3 Trac 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, hardnes , and mechanical properties

7.1.1 General

Ta le 1 gives a survey of combinations of usual tr atment con itions at delve y, prod ct forms, an

r q ir ment ac ording t o Ta les 2 t o 6 (chemical comp sition, ma imum hard es , me hanical

pro e ties)

7.1.2 C emical c omp sitio

The chemical comp sition det ermined b cas analysis shal comply with the v lues in Ta le 2

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

ar given in Ta le 3

The prod ct analy sis shal be car ied out w hen spe ified at the time of the en uiry an orde ( e B.5)

WARNING — Due to hazardo s efects to he lth and environmental pro lems of Pb, it is

recommended to instead use steels only with sulfur and othe innocuo s fre -cut ing element

additions

7.1.3 Mechanical pr oper ties

Me hanical pro e ties for fr e-cut ing st eels ar given in Ta les 4 t o 6

The st eels co e ed b this p rt of ISO 6 3 ha e g ood machina i ty an chip-br aking charact eris ics

Howeve , the machina i ty de r ases with inc easing carbon, si icon and mang nese cont ent , w hi e

cold r d ction impro es the machina i ity of the st eels not int en ed for heat r atment an st eel 1 S2

NOTE Non-le ded ste ls with compara le chemical composition g neral y have identical mechanical

properties, but ofen lower machina ility than le ded st eels

Be ause of their high sulfur an phosphorus cont ent, fr e-cut ing st eels ar normaly not r commen ed

for welding

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 fine grain s ructur is r q ir d for case-hardening st eels or st eels for q enching

an t empe ing, the spe ial r q ir ment in B.3 shal be orde ed

If dir ct hardening tr atment is used for case-hardening st eels, a f ine grain s ructur should be orde ed

7.5 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.4)

7.6 Surface qual ty

7.6.1 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

7.6.2 Minor surfac impe fe tions, which can oc ur u de normal man facturing con itions, such as

prints orig inating from roled-in scale, ar e not o be r egar ded as defe ts

7.6.3 Bars and wir e r od ar e delvered w ith surfac clas 1za ac or ding to ISO 94 3, u les othe wise

ag r eed at he timeof en uiry and orde

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

This should be taken int o ac ou t w hen a r ement on surfac q alty ar made

7.6.4 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

7.6.5 T e r emo al of surfac defe ts b welding is not pe mitted

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

7.7 Shape, dimensions, and toleranc es

The sha e, dimensions, and 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 an orde The a r ement shal, as much as p s ible, be b sed on cor esp n ing

Int ernational Stan ards ( e Annex D), or 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 cts comply ing w ith t his part of ISO 6 3 shal be or der ed an delver ed with one of t he

inspe t ion document s spe ified in ISO 1 474 The t y pe of document shal be a r eed up n at the time

of en uiry an or de If the or de does not contain any spe ification of this t y pe, a tes r ep rt 2.2 shal

beis 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 analysis of the conc rned cas for al element spe ified in Ta le 2 for the

s e l grade

8.1.3 If in ac or danc w ith the ag r eements in the or de an inspe tion c rtificate 3.1 or 3.2 is to be

pr ovided, the spe ific inspe tions an tes s desc ibed in 8.2, 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 rtificat e shal co e the folowing:

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

b ) r sult of the cas analysis of the conc rned cas for al element spe ified in Ta le 2 for the

s e l grade;

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

d) the symb l let e s or numbe 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 samplng con itions, and the t es methods t o be a pled for the ve if ication

of complanc with the r q ir ment shal be in ac ordanc with the pr sc iptions of Ta le 7

8.3 Specific inspection and testing

8.3.1 Ver ificatio of the har dnes and mechanical pr operties

The hard es r q ir ment an / r me hanical pro e ties given for the r lev nt tr atment con ition

in Ta le 1, column 6, sub-column 6.2, shal be ve if ied, with the folowing ex ception The r q ir ment

given in Ta le 1, fo tnot e a (me hanical pro e ties of r fe enc t es pie es), shal only be ve ified if the

sup lementary r q ir ment given in B.2, is orde ed

8.3.2 Visual and dimensio al inspectio

A sufficient n mbe of prod ct shal be inspe t ed t o ensur complanc with the spe ification

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

The l s of a ai a le Int ernational Stan ards on chemical analy sis is given in ISO/TR 97 69

9.2 Hardnes and mechanical tests

9.2.1 Har dnes

F or prod ct in the u tr at ed con ition, the hardnes shal be measur d in ac ordanc with ISO 6 0 -1

9.2.2 Mechanical tests

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 the ta les of me hanical pro e tiesin 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

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 theprod 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 name, 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, product forms, and

req irements ac ording to Tables 2 to 6

Ma imum Brinel hard es or

(in the case of disp te) the

tensile strength ac ording t o

Ta le 4 in the case of ste ls

not inten ed for he t

tre tment or Ta le 5in the

case of case-hardening st eels

or Ta le 6 in the case of ste ls

for q enching an tempering

4 Other Other tre tment con itions, for e ample, the stres relieved con ition, can b a re d at he

time of en uiry an order

a

The me hanic l proper ies spe ified in Table 6 for the q enched + tempered c n ition shal be a hievable afer

ap ropriate he t re tment if so agre d at he time of en uiry an order ( e B.2)

Table 2 — Steel grades and chemical compositio (cast analy sis)

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

than for the p rpose of finishin the he t Al re sonable pre autions shal be tak en toprevent he ad ition of such element

f om scrap or other materials used in man fa ture which afe t he me hanic l proper ies an ap lc bi ty However, if

agre d, the man fa turer c n ad element such as Ca, S , Te, etc for the p rpose of improvin the ma hinabi ty These

element have tobe repor ed in the inspe tion do ument

a

Ma imum values u les otherwise in ic ted

b

Sinc si c n has an adver e efe t on ma hinabi ty, it is not intentionaly ad ed to spe ified lmit , b t if the formation

of spe ial o ides is g arante d, a Si-c ntent of 0,10 % to 0,4 % c n be agre d

c

At he time of en uiry an order, it c n be agre d that either a grade with 0,0 % to 0,1 % P or a grade with ma ,

0,05% P shal be delvered

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 shal be tak en toprevent the ad ition of such element

f om scrap or other materials used in man fa ture which afe t he me hanic l proper ies an ap lc bi ty How ever, if

agre d, the man fa turer c n ad element such as Ca, S , Te, etc for the p rpose of improvin the ma hinabi ty These

element have tobe repor ed in the inspe tion do ument

a

Ma imum values u les otherwise in ic ted

b

Sinc si c n has an adver e efe t on ma hinabi ty, it is not intentionaly ad ed to spe if ied lmit , b t if the formation

of spe ial o ides is g arante d, a Si-c ntent of 0,10 % to 0,4 % c n be agre d

c

At he time of en uiry an order, it c n be agre d that either a grade with 0,0 % to 0,1 % P or a grade with ma ,

0,05% P shal be delvered

Table 3 — Permis ible deviatio s betwe n the prod ct analy sis and the lmiting values for the

cast analy sis

Element

Pe mis ible ma imum cont ent

ac ording t o cas analy sis

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

v alue of the spe ified ran e in this table, b t not both at the same time

Table 2 (c ontin ed)

Table 4 — Mechanical pro erties of fre -cut ing steels not intended for he t tre tment

In this table, grades aloyed with fur her element for beter ma hinabi ty are not

e plcitly mentioned, b t he me hanic l proper ies are also vald for them (e Table 2)

Table 5 — Mechanical properties of case-hardening fre -cut ing steels

In this table, grades aloyed with fur her element for bet er ma hinabi ty are not

e plcitly mentioned, b t he me hanic l proper ies are alsovald for them ( e Table 2)