Bsi bs en 10277 4 2008

BRITISH STANDARD BS EN 10277 4 2008 Bright steel products — Technical delivery conditions — Part 4 Case hardening steels ICS 77 140 20; 77 140 60 ?? ? ??????? ? ??????? ? ??? ? ?????????? ? ?????? ? ?[.]

ICS 7 1 0.2 ; 7 1 0.6

This Bri sh Stan ard was

published u der the authoriy

of the Stan ards Policy an

Strate y Commi e

on 3 April 2 0

This British Stand rd is the UK implementation of EN 1027 -4:20 8 It

super edes BS EN 1027 -4:19 9 which is withdrawn

The UK p rticip tion in its prep ration was entrusted to Tech ical Commit e

ISE/ 31, W roug ht ste ls

A l st of org anizations represented on this commit e can be obtained on

request to its sec etary

This publ cation do s not purport to include al the neces ary provisions of a

contract User are responsible for its cor ect a pl cation

legal obl gations

N ORM E EU ROPÉEN N E

Mar ch 2 0

En ls Ver sion

Br ight steel pr oducts - Technical del very conditions - Part 4:

Case hardening steels

Pr od its e a ier tra sformé à froid - Co ditio s

te h iq e d lvr ais n - Partie 4: Aciers p ur c me tatio

Bla ksta ler ze g is e - Te h is h Liefer be in u g n

-Tei 4: Ein atz tä le

This Eur op a Sta d r d wa a pr ov d b CEN o 4 Fe r uar y 2 0

CEN memb r s ar e b u d to c mply w ith th CEN/CENELEC Inter nal Re ulatio s w hic stip late th c n itio s for givin this Euro e n

Sta d r d th statu of a n tio al sta d r d with ut a y alter atio Up-o-d te lsts a d biblo r ap ic l r efere c s c n er nin s c n tio al

sta d rd ma b o tain d o a plc tio to th CEN Ma a eme t Ce tre or to a y CEN memb r

This Euro e n Sta d r d e ists in thr ee oficial v r sio s (En ls ,Fr en h, Ger ma ) A v rsio in a y oth r la g a e ma e b tra slatio

u d r th re p n ibi ty of a CEN memb r into its own la g a e a d n tifie to th CEN Ma a eme t Ce tr e h s th s me statu a th

oficial v r sio s

CEN memb r s are th n tio al sta d r ds b die of Au tr i , Belgium, Bulg r i ,Cy r us, Cz c Re u lc,De mar k,Esto ia, Finla d,

Fr an e, Ger ma y, Gr ee e, Hu g r y,Ic la d, Irela d,Italy,L tvia, Lith a ia, L x mb ur g,Malta, Neth r l n s,Nor w ay, Pola d, Por tu al

Roma ia,Slo akia, Slo e ia, Sp in, Swe e ,Sw itz r l n a d Unite K in d m

E U R OPE A N COMMI T TE E FOR ST A N DA RDIZ A T I ON

COMIT EUROPÉ N DE NORMALISATION

EUROPÄISCHES KOMIT E FÜR N RMUN

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© 2 0 CEN Al rig ts of e ploitatio in a y form a d b a y me n r es r ve

w or l wid for CEN n tio al Memb r s

Ref.No EN 10 7 -4:2 0 : E

Cont 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 5

7.1 Chemic l comp sit ion .5

7.2 Me h nic l pro ert i s 5

7.3 Hard n bi ty 5

7.4 Grain size 5

7.5 Non- met al c in lu ion 5

7.6 Opt ion 5

8 In pe t ion a d t es n 5

8.1 Ty pe a d cont ent s of in pe t ion doc me t s .5

8.2 Spe ific inspe t ion .5

8.3 Verific t ion of h rd n bi t y .6

9 Mark in 6

EN 10 7 - 4:2 0 (E)

Foreword

This doc ment EN 10 7 -4:2 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 -4:19 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

1 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 case hardenin st eels

This EN 10 7 -4 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 , Cas e h rde in s te ls - Technical delv ry co nditio s

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 St an ard, t he t erms an definit ion giv en in EN 10 7 -1 an the folowin

a ply

3.1

c se harde ing ste ls

st eels w it h a relativ ely low carb n cont ent, whic are int en ed for carburisin or carb nit r idin an

s bseq ent hardenin Su h st eels, aft er t re t men are c aract erised by a hig hard es s race layer an a

t ou h core

4.1 Clas ific t ion

St eel grades C10R , C15R an C16R are non-aloy sp cial st eels All ot her st eel grades cov ered by this

Euro e n Stan ard are aloy sp cial ste ls

4.2 Designation

Se EN 10 7 -1

Se EN 10 7 -1

Se EN 10 7 -1

EN 10 7 - 4:2 0 (E)

7.1.1 Cast a alysis

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

7.1.2 Product a alysis

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

The mec anical pro erties of t he st eels s al b as sp cified in Ta le 3 an Ta le 4

Where st eels are ordered w it h hardena i ty req irement s, t he req irement s of EN 10 8 s al a ply

7.4 Grain size

Unles other wise agre d, the st eel s al s ow a fine grain st ru t ure w ith an au t enitic grain size of 5 or finer

F r v erification se EN 10 7 -1, B.2

7.5 Non- metal ic inclusions

7.5.1 Microscopic inc lusions

The st eels s al have a degre of cle n es coresp n in t o t he sp cial st eel q alty

F r det ais of req irement s an v erification se An e A.1 an Anne C of EN 10 8

As fe dom fom macrosc opic in lu ion can ot b g arant eed in an ste l, an r eq irement t o v erify t he

lev el present s al b agre d at he time of en uir y an order (se EN 10 7 -1, 7.5.2 an B.3.2)

Se Anne B of EN 10 7 -1

Se EN 10 7 -1

8.2 Spe ific inspe t ion

Se EN 10 7 -1

Se EN 10 8 , 8.2.1.1.

Se EN 10 7 -1

E

Table 1 for the c st a aly is

Permis ible ma imum c ont ent in

t he c ast a aly sis

Permis ible d v iatio

a

Eleme t

Mn

+ 0,0 5

b

Ni

a

± me n th t in o e c st t he d v iatio ma oc cur ov er t he u p r v lu or u d r t he lower

v alu of th s e ifie ra g in Ta le 1, b t n t b th at t he s me time

b

For ste ls wit h a s e ifie s lp ur ra g (0,0 0 % t o 0,0 0 % a c ordin to c st a aly sis),

th p rmis ible d v iatio is ± ,0 5 %

R M

De ig at io

Me h nic l pro ert ie

a

+A

b

+

t urn d

(+A +SH)

+A b

+ c ld drawn

(+A +C)

+FP

c

+ turn d

(+FP +SH)

+FP c

+ c ld drawn

(+FP +C)

St eel n me St eel n mb r

Thickn s

a

mm

Hard e s

HBW

ma

Hard e s

d

HBW

ma

Hard e s

HBW

Hard e s

d

HBW

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

+A= s ft a n ale

international lev el It is incorporated b Roy al Charter

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