BRITISH STANDARD BS EN 10277 3 2008 Bright steel products — Technical delivery conditions — Part 3 Free cutting steels ICS 77 140 10; 77 140 60 ?? ? ??????? ? ??????? ? ??? ? ?????????? ? ?????? ? ??[.]
Trang 1ICS 7 1 0.1 ; 7 1 0.6
Trang 2This Bri sh Stan ard was
published u der the authoriy
of the Stan ard s Policy an
Strate y Commi e
on 3 April 2 0
© BSI 2 0
This British Stand rd is the UK implementation of EN 1027 -3:20 8 It
super edes BS EN 1027 -3:19 9 which is withdrawn
The UK p rticip tion in its prep ration was entrusted to Tech ical Commit e
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Compl anc with a British Standard cannot c nfer im m unity f om
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Trang 3NORM E EU ROPÉENNE
Marc h 2 0
ICS 7 14 10; 7 14 6 Su erse es EN 10 7 -3:19 9
En ls V ersion
Bright st eel produc t s - Tec hnic al del very c ondit ions - Part 3:
Free-c ut t ing st eels
Pro uit s e ac ier t ra sformé à foid - Co dit io s
t ec hniq e d lv rais n - Part ie 3: Ac iers d d c olet ag
Bla kst ahlerz u nis e - Tec hnisc he Lieferb din u g n
-Tei 3: Aut omat en t ähle
This Euro e n St an ard w as a prov ed b CEN o 4 Fe ru ry 0 8
CEN memb rs are b u d t o c omply w it h t he CEN/CENELEC Int ern l R eg lat io s w hic h st ip lat e t he c on it io s for giv in t his Euro e n
St an ard t he st at us of a n t io al st an ard w it ho t a y alt erat io Up-t o-d t e lst s a d biblo ra hic al refere c es c onc ernin s c h n t io al
st an ard ma b o t ain d o a plc at io t o t he CEN Ma a eme t Ce t re or t o a y CEN memb r
This Euro e n St an ard ex ist s in t hre ofic ial v ersio s (En ls ,Fre c h, Germa ) A v ersio in a y ot her la g a e ma e b t ra slat io
u d r t he re p n ibi t y of a CEN memb r int o it s ow n la g a e a d n t ifie t o t he CEN Ma a eme t Ce t re h s t he s me st at us a t he
ofic ial v ersio s
CEN memb rs are t he n t io al st an ard b die of Aust ria, Belgium, Bulg ria, Cy pru , Cz c h R ep blc ,De mark ,Est onia, Finla d,
Fra c e, Germa y , Gre c e, Hu g ry ,Ic ela d, Irela d,It aly ,L t v ia, Lit hu nia, L x emb urg,Malt a, Net herla d ,Norw ay , Pola d, Port ug l
R oma ia,Slov ak ia, Slov enia, Sp in, Sw ed n,Sw it zerla d a d Unit ed K in d m
EU ROPE A N COMM IT E E FO STA N DA RDI ZA TIO
COMIT EU OPÉ N DE N RMALISATIO
EUR PÄISCHES KOMIT E FÜR NO MUNG
Management Cent re: rue de St as art ,3 B- 10 0 Brus els
© 2 0 CENAll rig t s of ex ploit at io in a y form a d b a y me n re erv ed
w orldw id for CEN n tio al Memb rs
Ref.No EN 10 7 -3:2 0 : E
Trang 4Cont ent s Page
Foreword .3
1 Sco e 4
2 Norma v refere c s .4
3 Terms a d d finit ion 4
4 Cla sific t ion a d d sig a on .4
4.1 Cla sific t ion 4
4.2 De ig a on 4
5 Informa on t o be s p l e by t he purc a er .4
6 Ma ufa t uring proc s 4
7 R eq ireme t s 4
7.1 Chemic l comp sit ion .4
7.2 Me h nic l pro ert i s 5
7.3 Opt ion 5
8 In pe t ion a d t es n 5
9 Mark in 5
Trang 5EN 10 7 - 3:2 0 (E)
Foreword
This doc ment EN 10 7 -3:2 0 ) has b en pre ared by Tec nical Commit t ee ECISS/TC 2 “St eels for he t
t re t men aloy st eels an fe -c t t in st eels - Qualties an dimen ion ”, t he secret ariat of w hic is held by
DIN
This Euro e n St an ard s al b given t he st atu of a nat ional st an ard, eit her by publcat ion of an ident ical
t ex t or by en orsemen at t he lat est by Se t emb r 2 0 , an conflct in nat ional st an ard s al b
w it hdrawn at t he lat est by Se t emb r 2 0
At t ent ion is draw n to t he p s ibi ty that some of t he element s of t his doc ment may b t he s bject of p t ent
rig t s CEN [an /or CENELEC] s al not b held resp n ible for ident ifyin an or al s c p t ent rig t s
This doc ment s p rsedes EN 10 7 -3:19 9
Accordin t o t he CEN/CENELEC Internal R eg lat ion , t he national st an ard organization of t he folow in
cou t ries are b u d t o implement t his Euro e n St an ard: Aust ria, Belgium, Bulgaria, Cypru , Cz ec
R epublc, Denmark, Est onia, Finlan , Fran e, German , Gre ce, Hu gary, Icelan , Irelan , It aly, L t via,
Lit huania, Lu emb urg, Malt a, Netherlan s, Nor way, Polan , Port ugal, R omania, Slovakia, Slov enia, Sp in,
Sweden, Sw itzerlan an the Unit ed K in dom
This Euro e n St an ard EN 10 7 'Br ig t st eel pr od ct s - Tec nical delv ery con ition ' is s bdivided as
folows:
Part 1: General;
Part 2: Ste ls for general en ine rin purp ses;
Part 3: Fre -c t tin ste ls;
Part 4: Case hardenin st eels;
Part 5: Ste ls for q en hin an t emp rin
Durin t he pre aration of t he first edit ion of t his Euro e n Stan ard there w ere not enou h st at istical data
av aia le con ernin mec anical pro erties of brig t b r prod ct s Sin e then it has b en recog ized t hat t he
pro f st ren t h v alues in t he cold draw n con it ion wer e t oo hig In ad it ion, c clc st res es t hat oc ur d rin
st raig tenin can red ce the pro f st ren t h (Bau c in er's efect ), whic w as not taken into ac ou t w hen
draft in t he first edit ion of t his st an ar d In t his secon edition t he pr oof st ren t h v alues of non-aloy an aloy
grades in con ition +QT+C in p rt s 3 an 5 hav e b en adju t ed downw ard comp red t o t he first edition
Furt hermore for t his p rt he t en ie st ren t h v alues of 3 SMn(PB)14 an 3 SMn(Pb)2 in con ition +C an
for 3 S(Pb)2 in con it ion +QT+C were amen ed in t he t able for mec anical pro ert ies for st eels for
q en hin an t emp rin
Trang 61 Scope
This p rt of EN 10 7 a ples t o brig t st eel b rs in t he drawn, turned or grou d con ition, in st raig t len t hs
of fe -c t t in st eels
This EN 10 7 -3 is complement ed by EN 10 7 -1
The folowin referen ed doc ment s are in isp n a le for t he a plcation of t his doc men F r dated
referen es, only the edition cit ed a ples F r u dat ed referen es, t he lat est edition of t he referen ed
doc ment in lu in an amen ment s) a ples
EN 10 8 , Fre - cuttin s te ls - Technical delv ry conditio s fo r s emi-finis hed products , h t-roled b rs a d
ro ds
EN 10 7 -1, B rig ht s te l products - Technical delv ry conditio s - Part 1: Ge eral
F r t he purp ses of t his Euro e n Stan ard t he t erms an definit ion giv en in EN 10 7 -1 a ply
4 Classificat ion and designat ion
4.1 Clas ific t ion
All st eels sp cified in t his Euro e n St an ard are clas ified as non-aloy q alty ste ls
4.2 Designation
Se EN 10 7 -1
5 Informat ion t o be suppl ed by t he purchaser
Se EN 10 7 -1
Se EN 10 7 -1
7.1 Chemic l composit ion
7.1.1 Ca t a aly sis
The c emical comp sit ion of t he st eel ac ordin to t he cast analy is s al b as sp cified in Ta le 1
Trang 7EN 10 7 - 3:2 0 (E)
7.1.2 Produ t a aly sis
The p rmis ible dev iat ion fom t he c emical comp sit ion as sp cified in Ta le 1 for cast analy is an t he
prod ct analy is of t he st eel s al b as sp cified in Ta le 2
7.2 Me hanical propert ies
The mec anical pro erties s al b as sp cified in:
Ta le 3 for st eels not inten ed for he t t re t men
Ta le 4 for case-hardenin st eels,
Ta le 5 for st eels for q en hin an t emp rin
7.3 Opt ions
Se Anne B of EN 10 7 -1
8 Inspect ion and test ing
Se EN 10 7 -1
Se EN 10 7 -1
Trang 8Table 1 — Ste l gra e a d c emic l composition (c st a aly is)
De ig at io
Ch mic l co mp sitio (% b ma s)
a
Ste l n me Ste l
n mb r
St eel gra e ac cordin
to
C
Si
ma
Mn
P
ma
St eels n t inte d d for h at t re tme t
0,0
b
0,9 t o 1,3 0,1 0,2 t o 0,3 -
0,0 b
1,0 t o 1,5 0,1 0,3 to 0,4 -
Ca e h rd nin st eels
10SPb 0 1.0 2 EN 10 8 0,0 t o 0,13 0,4 0,7 t o 1,10 0,0 0,15 to 0,2 0,2 t o 0,3
Ste ls for q e c in a d t emp rin
3 SPb 0 1.0 5 EN 10 8 0,3 t o 0,3 0,4 0,7 t o 1,10 0,0 0,15 to 0,2 0,15 t o 0,3
3 SMnPb14 1.0 6 EN 10 8 0,3 t o 0,3 0,4 1,3 t o 1,7 0,0 0,10 t o 0,18 0,15 t o 0,3
3 SMnPb 8 1.0 61 EN 10 8 0,3 t o 0,4 0,4 1,2 t o 1,5 0,0 0,2 t o 0,3 0,15 t o 0,3
4 SMnPb 8 1.0 6 EN 10 8 0,4 t o 0,4 0,4 1,3 t o 1,7 0,0 0,2 t o 0,3 0,15 t o 0,3
4 SPb 0 1.0 5 EN 10 8 0,4 t o 0,5 0,4 0,7 t o 1,10 0,0 0,15 to 0,2 0,15 t o 0,3
a
Eleme t s n t q ot ed in t his t able s al n t b int entio aly a d d t o th ste l wit ho t h a re me t of th p rc a er, oth r t ha for t he
p rp s of finis in th h a Howev er, eleme ts s c a Te, Bi etc ma b a d d b t he ma ufac t urer for improv in th
ma hin bi t y , if t his h s b e a re d at t he time of e q iry n ord r
b
If,b metalurgic l t ec niq e , t he format io of s e ial o id s is g ara t ee ,a Si-c nte t of 0,10 t o 0,4 % c n b a re d
Trang 9EN 10 7 - 3:2 0 (E)
Table 2 — Permis ible d via on bet we n th prod ct a aly is a d t he l miting v lu s giv n in
Table 1 for t he c st a aly is
Eleme t
Sp c ifie ma imum c ont ent
in t he c st a aly sis
%b mas
Permis ible
d v iat io s
a
% b mas
C
> 0,3
≤ 0,3
≤ 0,5
± 0,0
± 0,0
Si
> 0,0
≤ 0,0
≤ 0,4
+ 0,01
+ 0,0
Mn
> 1,0
≤ 1,0
≤ 1,7
± 0,0
± 0,0
P
> 0,0
≤ 0,0
≤ 0,1
+ 0,0 8
+ 0,0
S
> 0,3
≤ 0,3
≤ 0,4
± 0,0
± 0,0
+ 0,0
- 0,0
a
± me n t hat in o e c st t he d v iat io ma o c r ov er t he
u p r v alu or u d r th lower v lu of t he s ec ifie ra g in
Ta le 1, b t n t b t h at h s me time
Table 3 — Me h nic l propert i s of free- cut tin ste ls not inte d d for he t tre tme t
Desig at io
Mec ha ic lpro erties
a
A s role a d t urn d (+SH) Cold drawn (+C)
St eeln me St eel n mb r
T hick nes
a
mm
Hard es
b
HBW
Rm
MPa
R
p 0,2
MPa
min
R
m c
MPa
A
%
min
> 16 ≤ 4 1 2 t o 16 3 0 t o 5 0 3 5 4 0 t o 710 8
1 SMn 0
1 SMnPb 0
1 SMn 7
1 SMnPb 7
1.0 15
1.0 18
1.0 3
1.0 3
> 6 ≤ 10 10 t o 15 3 0 t o 5 0 2 5 3 0 t o 6 0 9
a
For thick ne s s < 5 mm t he me h nic l pro ertie ma b a re d at h time o f e q iry a d ord r
b
Only for informat io
c
For flat s a d s e ial s c tio s t he y ield stre gt h (R
p,2
ma d v iat e b - 0 % a d t he t en ie st re gth (R
m ) b ± 10 %
Trang 10Table 4 — Me h nic l pro ert i s of free-c tin ste ls for c s hard nin
a
A s role a d t urn d (+SH) Cold drawn (+C)
St eel n me St eel n mb r
T hick nes
a
mm
Hard es
b
HBW
R
m
MPa
R
p 0,2
MPa
min
Rm c
MPa
A
%
min
> 16 ≤ 4 10 t o 15 3 0 t o 5 0 3 0 4 0 t o 7 0 9
> 4 ≤ 6 10 t o 15 3 0 t o 5 0 2 5 410 t o 6 0 10
10S2
10S b 0
1.0 21
1.0 2
> 6 ≤ 10 10 t o 14 3 0 t o 4 0 2 5 3 0 t o 6 0 1
> 16 ≤ 4 12 t o 17 4 0 t o 6 0 3 0 4 0 t o 7 0 8
> 6 ≤ 10 12 t o 16 4 0 t o 5 0 2 5 4 0 t o 6 0 10
a
For t hic n s e < 5 mm t he me h nic l pro ert ie ma b a re d at th time of e q iry a d ord r
b
Only for informat io
c
For flat s a d s e ial s c tio s t he y ield st re gt h (Rp
,2
ma d v iate b - 0 % a d t he t en ie st re gth (Rm) b ±10 %
Trang 11De ig atio
Me h nic l pro ertie
b
Cold drawn + q e c e a d
temp re (+C + QT)
c, g
Qu n h d a d temp re + c ld
draw n (+QT + C)
g
St eel n me Ste l n mb r
Thic k ne s
a,b
mm
d
HBW
R
m
MPa
Rp
,2
e
MPa
min
Rm e
MPa
A
%
min
R
p ,2
MPa
min
R
m
MPa
A
%
min
R
p ,2
MPa
min
R
m
MPa
A
%
min
1.0 2
1.0 5
1.0 6
1.0 6
1.0 6
1.0 61
7 0 to 1 0 0
f
5 f
710 to 9 0
f
5 f
> 16 ≤ 4 18 to 2 2 6 0 t o 8 0 4 0
6 0 to 9 0
f
6 f
1.0 6
1.0 6
1.0 2
1.0 5
a
For n n-o n pro u ts in t he q e c e a d temp re c n it io , s e EN 10 7 - , Fig re A.1
b
For t hick ne s s < 5 mm th me h nic l pro ert ie ma b a re d at t he t ime of e q iry a d ord r
c
Th s v alu s are als v ald for th ‘q e c e a d temp re + turn d’ c n it io
d
Only for informatio
e
For flats a d s e ial s c t io s t he y ield stre gt h (Rp 0,2 ma d v iate b - 10 % a d t he t en ie stre gt h (Rm) b ±10 %
f
By me n of h av y draftin t he e ste ls ma b s p le with a minimum t en ie st re gt h (Rm) of 9 0 MPa a d a minimum elo g tio (A) of 4 %
g
In EN 10 8 , th t erm 'dire t h rd nin ' wa u e This t erm mu t b c a g d to 'q e c in a d t emp rin ' d rin t he n xt rev isio of t hat st an ard
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