BS-10139 1998
-
Upload
anonymous-efvddj40vw -
Category
Documents
-
view
310 -
download
7
Transcript of BS-10139 1998
-
8/17/2019 BS-10139 1998
1/15
BRITISH STANDARD
Cold rolled uncoated mild
steel narrow strip for cold
forming
-
echnical delivery
conditions
The European StandardEN 101391997has the status of a
British
Standard
ICs 77.140.50
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT
LAW
B S EN
10139:1998
opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
2/15
-
STD-BSI B S EN LOL39-ENGL 1998
L b 2 L l b b 9
0 7 0 8 7 b 2 2 L b
BS EN 10139:1998
This
British standard,having
been
prepared under the
direction
of
the EngUieering
Sector
Board,was
published
under the
authority
of the
Standards Board
and comes into
effect
on
16
July 1998
BSI
1998
ISBN O 5802 MM X
National foreword
This British Standard
is
the English language version
of
EN 101391997. It
supemedesBS 1449 :Section 1.9 :1991 which is withdrawn.
The
UK
participation
in
its
preparation
was
entnisted
to
Technical
Committee
ISW10,Flat rolled steel products, whichhas he responsibilityto:
- id enquirers o understand the t
- resent
to
he responsible European commitîeeany enquirieson the
onitor
related
international
and
European developments and promulgate
interpretation,or proposals for change, and keep the
UK
interests
informed,
them in the UK.
A list of organizations represented on thi s committee
can be
obtainedon request to
its secretary.
Cross-references
The BritishStandardswhich implement international or European publications
referred
to
in thisdocument may be found
in
the BSI Standards Catalogue under the
section entitled
“ht~rnational
tandards Correspondence Index”, or by using the
“Find”faciiity of the BSI StandardsElectronic Cataìogue.
A BritishStandard doesnot purport
to
include a l l the necessary provisions of a
contract. Usersof British standards are responsible for their correct application.
Compliance with
a
British Standard does not
of itself
confer immunity
from legal obligations.
Summary of pages
This document comprises a front cover, an inside &ont cover, the EN titìe page,
pages 2 to 12, an inside back cover and a back cover.
Amendments issued since publication
AmdNo* Date ITe*affebed
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
3/15
STD.BS1
B S
EN
L O L 3 9 - E N G L 1 7 7 8
m
Lb2Libbî 07087b3
152
m
EUROPEAN
STANDARD
NOFUVE EUROPÉENNE
EUROP- NORIM
EN 10139
November 1997
ICs 77.140.50
Descriptors: Cold rolled products, strips, low carbon steels, unalloyed steels, cold-working, classifications, grades: quality,
delivery conditions, designation, characteristics, tests
Engùsh version
Cold rolled uncoated
mild
steel
narrow sttip for cold
forming
chnical
delivery conditions
Feuillards non
revêtus
l amnés
à
h i d en aciers
doux pour formage
à h i d onditions
techniques de livraison
Kaltband ohne
Übemig aus
weichen
stahlen zum
Ka\tumformen hnis ch e Liefe&xhgungen
This European Standard was approved by CEN on 24 November 1996.
CEN members are bound to comply with the CENKENELEC Internal Regulations
which stipulate the conditions for giving
thi s
European Standard the status of a
national
standard
without any alteration. Up-to-date
iists
and bibliographical
references concerning such national
standards
may be obtained on application
to
the Central Secretanat or to any CEN member.
This European Standard exists in three official versions (English, French, German).
A
version in any other language made by translation under the responsibility
of
a
CEN member into its own language and notified to the Centsal Secretariat has the
same status
as
the official versions.
CEN members are the
national
standards bodies of Austria, Belgium, Czech
Republic, Denmark, F’inhd, Frcuice, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United
Kingdom.
CEN
European Committee for Standardization
Comité
Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat:
rue
de Stassart 36, B-1060 Brussels
O
1997CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
Members.
Ref. No. EN 101391997 E
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
4/15
~~~
STDmBSI BS EN 1 0 1 3 9 - E N G L
1998 m 1 b 2 4 b b 9 0 7 0 8 7 b 4 O99
Page 2
EN 10139A997
Foreword
The European Standard has been prepared by
T e c h n i d
Committee ECISS/TC 13, Flat products for
cold w o r m - ualities, dimensions, tolerances and
specific
tests
the
secretariat
of which is held by
IBNAIN.
This European Standard shall
be
given the
status
of
a
nationai
standard, either by publication of an identical
text
or by endorsement, at the latest by May 1998, and
the latest by May 1998.
According
to
the CENICENELEC
Zntenial Regulations,
the
national
standards
organktions
of the following
countries are bound to implement thisEuropean
Standard:Austria,
Belgium, Czech Republic, Denmark,
Finland, France, Germany Greece, Iceland,
Ireland,
Italy,
Luxembourg, Netherlands, Norway,
Portugal,
Spain?Sweden, Switzerland and the
UNted
Kingdom
conflicting
national standards shall be
withdrawn
at
Contents
Foreword
1
2
3
4
5
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
7
7.1
7.2
7.3
7.4
7.5
8
9
10
11
12
scope
Normative references
Definition
Classification of grades and delivery
condition
Designation
Properties
Production
processes and chemical
composition
Choice of properties
Mechanical and technological
properîies
Surface chamcteristics
Stretcher
stsallis
Suitability for the application of
surface coatings
Weldability
Dimensions, mas, permisible
tolerances
Testw
Agreement of acceptance testing
Acceptance
units
and number
of tests
Sampling and preparation of
test
pieces
Test
methods
to be
foilowed
Re-tests
Marking
ouing
Packing
Information
to be
supplied by the
purchaser
Disputes
Annex
A
(normative) Methd of
determination
of
the piastic strain ratio T
Annex
B
(nomative) Methd of
determination of strain hardening
exponent
n
Annex
C
(informative) List of
national
standaràs complying with the eurononns
given
in
the references
(see
clause 2
page
2
3
3
3
3
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
5
6
6
6
6
10
11
12
Q
BSI 1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
5/15
~
S T D B S I B S
E N
LOL37-ENGL 1778 L b 2 4 b b 7 0 7 0 8 7 b 5 T 2 5
1 scope
1 1
This
European Standard applies
to
cold rolled
narrow strip
in
coils and cut lengths in thichecses up
to 1Omm and of widths less
than600
nun,
made from
mild, unalloyed and alloyed steels in accordance with
Table 1.
These products are suitable for cold forming. They are
also
suitable for surface coating. On he other hand,
they are not suitable for hardening beatment followed
by tempering.
1.2 This
European Standard does not cover cold
rolled flat products for which a separate standard
already exists, particularly the following products:
old rolled non oriented magnetic steel sheet
and strip (EN 10106);
rajn-onented magnetic steel sheet and strip
(EN 10107);
emi-processed steel strip for the construction
of magnetic circuits
(EN
10126
and
EN 10165);
old rolled narrow ship for the manufacture
of springs (EURONORM 132);
igh yield strength steels for cold forming
(EN
10268);
old rolled uncoated low carbon steel fiat
products for cold fonning (EN 10130);
old reduced blackplate
(EN
10205);
heet and strip for enamelling (EN 10209).
2 Normative references
This
European Standard incorporates by dated or
undated reference, provisions from other publications.
These normative references are cited
at
the
appropriate place in the text and the publications axe
listed hereafter. For dated references, subsequent
amendments to or revisions of any of these
publications apply to thi s European Standard only
when incorporated in it by amendment or revision. For
undated references the latest
edition of the publication
referred
to
applies.
EN 10002-1,
Metauic materials
nsile
test
Part 1:Meüwd of test (at ambient temperature).
EN 10002-2,
Metauic materials
ensile
test
Part 2: V fìcatwn
of
the f ì e masuring
system
of
the tensile
testing machines.
EN 1000241),Metauic ma- nsile
test
Part 4: Vemfication
of
extensometer
used in
uni xi l
EN 10020,Definition and classification of
grades of
Steel.
testing.
Page 3
EN 101391997
EN 10021,SteeLs and i ron und
steeì
products
eneml
technical
cìeìivery
conditions.
EN 10027-1,
Designation
systems
for
steel
Part 1:Steel namas, pr inc ipa l sgrnòols.
EN 10027-2,
Designation
systemsfor steel
Part
2:
Numerical
sysiern.
EN 10079,Def in i twn of steel products.
EN 10140,Cold mUed narrow strip l'oblemnces on
dimensions and
shape.
EN 10204,Metuüic
products
m s of inspection
clocuments.
EURONORM 5 (1979)2), V i c k s hardness
test
for steel.
EURONORM
18
(1979)2),
Sampling and preparation of
test
pìeces
for
steel and
iron
and
steel
products.
EURONORM 49 (1972)2),
Memurernent of
the
roughness of thin products
made of cold
rolled
and
uncoated
stm. ~.
CR 10260,Designation systemsfor steel
-Additional
symbols for
steei
n u m .
3
Dennitions
3.1
For the purposes of
ths
European standard, the
definitons
of
cold rolled flat products given
in
clause 1
are identical
to
those given in EN 10079.
NOTE
in
the case of narrow widths,
strip
complying
wth
t h i s
standard may
also
be
wound
in
layers and supplied
in
the form
of
a
bobbin wound coil.
3.2
After uncoiling
and
shearing, strip may be
supplied
in
cut lengths.
4 Classification of grades and delivery
condition
4.1 This European Standard specifies the grades listed
in 'pable 1. in the
case
of steel graàe
DCO1,
the
deoxidation method
shall be
le&
to
the manufacturer's
discretion.
Steel grades
DC03,
DC04, DC05 and DC06
shall
be
supplied
fully
kiiled.
4.2 Products manufactured from these steelsmay be
ordered and supplied
in
different delivery conditions
(see W l e 1) and
with
different surface appearances
(see
6.4
and làble 2).
4.3
For the purposes of the
specifications
of thi s
European
Standard,
the selection of steel graàe,
delivery condition and surface finish are the
responsibility of the purchaser.
'1
Currently at
draft
stage.
2,
Until
they
are transformed into European Standards, either the Euronorms or the corresponding national standards listed in annex C
of
this
European
Standard may be used.
O BSI 1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
- - ` ` ` , - ` - ` , ,
` , ,
` ,
` , ,
` - - -
-
8/17/2019 BS-10139 1998
6/15
~
~
STD.BSI BS
EN
10139-ENGL 1998 m L b 2 1 ( b b 9 0 7 0 8 7 b b 9bL
Page 4
EN
10139A997
6
Designation
The symbol designation of the steelgrades n thi s
European
Standard
is
in
conformi ty
with
EN 10027-1 and Information Circular ECISS IC 10; the
numerical designationis allocated in conformity with
The standarddesignationconsists of the words narrow
strip or cut lengths, followed in order by:
a)
reference to this European Standard,EN 10139,
b) the symbol DC, followed by the grade designation
(01,03,04,05 and 06);
c) the symbol for delivery condition (see làble 1 ;
d) the symbol for surface appearance@& MB or
MC eeW l e
2);
e) the symbol for surface finish where appropriate
(RM
or
RR,
see
6.4.3
and làble
2).
EN 10027-2.
Examples of standard designations
Designation of cold rolled steel narrow strip, grade
DCO4,
in
a lightly skin-passed condition
(LC),
with a
“scratch and pit-free” surface appearance
(MB)
and a
”matt” surface finish
(RM):
D e s i i o n of cold rolled
steel
narrow strip, grade
DC03, n the anneaiedcondition(A), with “bright”(MA)
surface appearance and a “smooth” surface finish:
Narrow strip
EN
10134DC04
+
LC
MB
RM
Narrow strip EN 10139-DCû3+
AMA
6
Properties
6.1 Production processes an d chemical
composition
6.1.1 The steel making process of the steelshall be
lefi
to
the manufacturer’s
discreüon.
The production process of the product, where not
stipulated in the order,shall also remain at the
manufkturer’s discretion.
6.1.2 The chemical compositionbased on ladle
analysisshail
be as
given
in
W l e
1.
6.2 Choice of properties
The products covered by this European standard shaii
comply with the specifications given in W l e
1
of this
standard.
If
agreed
separately, they may
be
supplied
with a special
sui tab i i
for makjng a particular pait;
in
this
case maximum percenhge of processing
scrap may be ñxed by common agreement and
acceptance
tests
on the basis of the mechanid
properties shallnot apply
6.3 Mechanical and technological properties
6.3.1 The mechanid and technologid properties of
the products
~IE
given
in
làble
1.
These properties
are
guaranteedfor the periods speci6ed
in
làble
1
with
effect€¡-om the date
that
the products are made
available forde hqx The purchasershail be
nformed
of
this
date when the produds o be made available,
with
a
warning
appropriate
to
the
guarantee
of
mechanid properties. &rage of graàe
N O
produds
for more than3months
may cause a
change in the
mechanid properties
iikely to give rise to a
reduction
in the suitability for forming and ctrawing
6.3.2 The usual test
for
checking the mechanical
properties given
in
W l e 1
s
the tensile test,However,
if
agreed
at
the time of ordering,
hardness
values
may
be specified
i nstead
of tensile testproperties, but not
both.
6.3.3 The tensile test values
shaìl
apply to longitudinal
test
pieces. The requirements of3.3.2 of
EURONORM 18-79,shall not apply
6.4
Surface
characteristics
6.4.1 General
Surface c-ristics concern surface appearance
and surface finish. These shall
be
specified by the
purchaser
at
the time of ordering.
Unless otherwise speciñed
at
the time of orùering, he
products
shail
be supplied with
a
surface appearance
MA
and
a smooîh
surface
finish (Rb
with R,
5
0,6pm).
6.4.2 Sur tzce appearance
6.4.2.1
Cold rolled fiat products covered by thi s
European Stanàard may be supplied with surface
appearances
MA,
MB or MC as described in làble 2.
The required surface appearanceshall be stated in the
designation see clause
6).
6.4.2.2 The characteristics
ndicaîed in
làble 2 apply
to
the surfaceactually inspected, which is generally the
outside surface of coils and the top surface of lengths.
The appearance of the uni nspected d a c e shall
correspond
at
least
to
surface appearance
MA.
These
charact~ristics
hall not apply to the
first
inner
and outer laps of coil or
to
lengths cut from them.
6.4.3
Suflncejìnish
6.4.3.1 The surface
finish
may be
rough,
math, smooth
or
mirror finish,as given in làble 2.
Products with surface
appearances
MA and
MB
are
generaiiy supplied with
a
smooth surfacefinsh (RI.,). If
rough
(RI¿)
or
matt
(RM)
ñnishes
are requkd, the
corresponding symbolshaü
be
given in the designation
see
clause6 .
The surface appearanceMC hali only be supplied with
a
”mirror”
finish
(RN).
6.4.3.2 The different surface
finishes
are
characterized
by the following referencevalues of mean roughness
rough:I , 1,5pm;
malk 0,6 pm
c R,
1,8
pm;
smooth
R,
5 0,6 pm;
mirror fini& R, 5 0 2
pm.
6.6
Stretcher strains
The tendency towards the fonnation of l.?a&ms or
stretcherstrains during forming may
be
eliminated for
a
time by light
skin-pasing
(LC).
The period of M o m rom stretcher
strains
can
be
assumed
to be three
months for gradeWO1 and six
months for the other
grades,
from the
agreed
date
when the product
is
available for dehvery
(o BSI
1998
opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
7/15
6.6
Suitability for the application of surface
coatings
6.6.1
The products covered by ths European
Standard are suitable for surface coatings t a h g into
account the following requirements:
a) li
the products
shall
be suitable for organic
coating;
b) li the products shall be suitable for the
application
of
a metailic coating, e.g. zinc, tin or lead
by means of hot dipping or thermal spraying;
c) all the products with surface appearances
Mi3
or
MC shall be suitable for electrolytic coating.
6.6.2
The application of surface c o m equires that
the surface
be
suitably prepared beforehand
by
the
processor. The type of coating
shail
be
agreed
at
the
time of ordering
if
the types of coatings described
in
6.6.1
b) and c)
are to
be used.
6.6.3
If
a metallic coating is to be applied in
accordance with
6.6.1
b), it shallbe noted that for
delivery conditions C290to C690, recovery or
recrystallization caused by higher temperatures could
have an effect on the mechanical properties of the
product.
6.7
Weldability
All steel
grades
and delivery conditions shall be
suitable for welding using appropriate methods. For
delivery conditions C290
to
C690, it should be noted
that
the temperature rises during the welding operation
could affect the mechanical properties and the
microstructure.
6.8 Dimensions, mass, permissible tolerances
6.8.1
For the dimensions and the tolerances on
dimensions and shape,
see
EN
10140.
6.8.2
A density of 7 , s kg/dm3 shall be assumed for
calculating the masses for ll types of steel covered by
ths European Standard.
7 %?st ing
7.1
Agreement
of
acceptance testing
7.1.1 If a
test
is
specified by
a
purchaser, he shall
specify
at
the time of tendering and ordering:
- he type of test (specific or non-specific)
(see EN 10021);
he type of test document (see EN 10204).
7.1.2
The specific test shall be carried out in
conformity with the requirements of
7.2 to 7.6.
7.2 Acceptance units and number
of
tests
7.2.1
The acceptance unit is
5 t
or
fraction
of 5
t of
products of the same steel grade, the same delivery
condition and with the
same
surface characteristics
and nominal thickness. Coils weighing more than
5
t
shall be regarded as one acceptance unit.
All products belonging to one acceptance unit shall be
from the same cast.
Page 6
EN 101391997
7.2.2
For each acceptance unit
a
tensile
test
shall be
carried out
and
where appropriate a determination
of n
and
r
(see Table
1
and annexes
A
and
B).
Alternatively
if specified at the time of ordering a hardness test shall
be carried out.
7.3
Sampling and preparation of test pieces
7.3.1
A sample of adequate size for
all
the
tests to
be
carried out shall be taken from the products
comprising the acceptance unit from any position on
the strip or cut length. In cases of dispute,
ths
sample
shaiì be taken from
a
position at least 3 m from one of
the ends of the coil.
7.3.2
The tensile
test
pieces
shall
be taken from
samples complying with
7.3.1,
parallel to the direction
in
which the product was rolled. The
test
pieces
should not
be
further worked on either surface.
7.3.3
When cutting the teJt pieces from the samples,
as
little deformation as possible shall be caused. If
shears or cutting torches are used, an adequate surplus
shaiì be allowed, which will then be further worked
(see EURONORM
18).
7.4
Test methods to be followed
7.4.1
All mechanical and technological tests shall be
carried out
at
ambient temperature.
7.4.2
The tensile test shall be carried out in
accordance with EN
10002-1.
7.4.3
if agreed separately at the time of ordering, the
Vickers hardness test shall
be
carried out in
accordance with EUFtONORM 5.
7.4.4
If
agreed
separately at the time of ordering,
surface roughness
shall
be determined in accordance
with EURONORM 49.
7.4.6
The determination of plastic
strain
ratio r and
tensile hardening component
n
shaH be carried out in
accordance
with
annexes
A
and B of tkis
standard.
7.6
Re-tests
7.6.1
if
the
resuits
obtained from
a
correctly selected
sample do not meet the specined requirements, two
further samples from the same acceptance unit
shall
be
tested for each unsatisfactory test
in
accordance with
EN 10021and both these shall meet the specified
requirements.
7.6.2 The manufacturer
shall
be entitled to submit
unsatisfactory acceptance units for retesting after
suitable rectification treatment has been carried out.
8 Marking
Marking of the products in h e with the specifications
of EN 10021 may be agreed at the time of ordering.
O BSI
1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
- - ` ` ` , - ` - ` , ,
` , ,
` ,
` , , `
- - -
-
8/17/2019 BS-10139 1998
8/15
STDDBSI
B S EN LO139-ENGL
1998
1 b 2 4 b b 7
07087b8 73q
Page 6
EN
1013 k1997
9Oil ing
9.1 For all delivery conditions, apart from
A,
the
products are
usuaily
covered with traces of rolling
oil
during the íjnishingprocess. However,
this
does not
provide aàequate protection against corrosion.
9.2 The products
are
normally suppliedoiled.
in
this
case oth sides are protected bya coat of nondrying
neutrai
oil,
free from foreign bodies and spread
uniformly
so that
under the n o d
acking, kmsport,
loading and storage conditions therewill be no
corrosion after
three
months.
If the
transport
and storage conditions make special
corrosion protection necessary, the user shall
inform
the manufacturer of
thi s at
the time of ordering.
The
oil
film
shall
be removable by
an
alkaline solution
or other n o d olvents.
The selectionof protection oils
shall
be the subject of
a
separate agreement.
9.3 If the product is
to
be supplied with the surface
degreased
at a
separate operation,ths
shail
also be
agreed
at the time of ordering.
9.4 if the product is to be supplied in the asrolled
condition, or without oil, here is an increasedrisk of
scratching
and rust formation during transpornon
and storage.
10
Packing
The
type of
packing conditionsshail be agreed
separatelyat the time of ordering.
11 Idormation
to
be
supplied by the
purchaser
To
compiy
adequately
with the requirements of
ths
standard, tenders and orders shali include the
following information:
a)
the complete designation of the product
(see clause 6);
b) if nec- the delivery condition required,
noting the suitabilityof the product for
making a
particuiarpart (see 6.2);
c) the suitability
for
the applicationof surface
coatings (see 6.6);
d) whether the product
is to
be supplied with an
oiled
or an unoiled surface (see 9.2 and 9.3);
e) nominal dimensions (see
6.8 ;
f)
quantity tobe supplied;
g) the type of acceptancetests required (see7.1.1);
h)
if
necessaq the
type
of test document wanted
(see 7.1.1);
i)
marlung
requirements
see
lause 8);
j packing requirements, including
limits
on mass
and dimensions of
coils
and individual bundles
(see clause10).
12
Disputes
The provisions of
EN
10021
shaii
apply
to
disputes and
their settlement.
Q BSI 1998
opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
- - ` ` ` , - ` - ` , ,
` , ,
` ,
` , ,
` - - -
-
8/17/2019 BS-10139 1998
9/15
STD-BSI B S
E N
1 0 1 3 7 - E N G L
1778
L b Z l r b b S
0 7 0 8 7 b 7
b 7 0
9
0
O
in
8
Page 7
EN
101391997
I
8 r:
I
3
0
3
0
O
o
O
8
ö
in
O
03
8
0
2
0
D l I I I
I I I
1 ; l
I I I I
N I I I I I I I I I I I
2 1 I I I 1 1 8 E l I I I
x
C S I I I I I
W
N I I I I I
I
u
.E
I
a
L
a
I
i
g o g o o :
shod
8 :
N F:
m f I
*
*
o o o o o
m ; T ; r n ~ r n c
2 ? v 3 v O t
BSI
1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--` ` ` ,-` -` , ,` , ,` ,` , ,` ---
-
8/17/2019 BS-10139 1998
10/15
STD-BSI B S
EN
L OL 3 7 - E NGL
1998 L b 2 g b b 9
O708770
392
Page 8
EN 1013%1997
6
E
o BSI 1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
- - ` ` ` , - ` - ` , ,
` , ,
` ,
` , ,
` - - -
-
8/17/2019 BS-10139 1998
11/15
STD-BSI
B S
E N
LO337-ENGL 1778 W
Lb2Libb7
0 7 0 6 7 7 3 2 2 7
Symbol
MA
MB
MC
Page
9
EN 101391997
Characteristics
Field of
application Surface finish
(see 6.4.3)
RR,
RM, RL2j
RM, RL2)
Bright, metaiìicaiiy clean surface, pitting, small
AU
thicknesw and
defects
and scratches
are
permitted.
treatment conditions
Bnght, metallically clean surface; pi- grooves and Thicknesses 5
2,0
mml)
scratchesare permitted as long as the uniform ali irealment conditions
smooth appearance is not substantially impaired except
A
when viewed wiîh the naked eye.
Bnght, me tailidy clean surface; pitting grooves and Thicknesses ,0
mml)
scratches are permitted as long as he
uniform
all
treatment conditions
appearance
of
the mirror surface
is not impaked.
except
A
RN2)
Table
2
urface appearances and
finishes
O
BSI
1998
opyright European Committee for Standardization
rovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--` ` ` ,-` -` , ,` , ,` ,` , ,` ---
-
8/17/2019 BS-10139 1998
12/15
Page
10
EN 10139A997
Symbol
Designation
b
ûricjnai
gauge
width
of the test piece
Annex A (normative)
Method of determination of he plastic
s t r a i n ratio
r
NOTE This annex
is
based upon the proceduresbeing developed
by ISOmC 1WSC2.
A.l Deñnitions, symbols and designations
A.l. l plastic strain ratio r is definedas the ratio of
true width and thicknessstrains
in
a
test
piece that
has
been submitted
to
miaxial tensile stsess.
&b
r = -
Ea
where
E
q, isthetruewidthshah.
is
the true thickness
sti.ain;
The plastic shah shallbe homogeneous.
A.1.2 S i c e measurements
of
length are more easily
made thanof thickness changes the foilowing
relationship derived from the
law
of constancy of
volume before and after plasticstrain is normally used
for calculation of
Unit
mm
r = -
ln-
Lb
Lobo
The symbol
r shall
be
completed by index figure
x
giving
the orientation of the testpiece relative
to
the
roiìing direction and by index
figure
y giving the strain
levei, for example,
rwo (see
'pabe Al).
A1.3 The weighted averagerdgd u e s cal-
using
the fo rm a
- ro + ra + 2r45
4
=
A1.4 symbols and designationsused
in
measurement
and calculations for detennining the piasticsimin
ratioT are given in "?able Al.
A.2
Principle
The method invoivescafiying out
a
tensile test
to a
speciñed strain level of 20 and of determinllig the
plastic strain ratio by calculation
from
measurements
of the changes in length and width for a given test
piece
As
the determination
shall
be d e d ut in the range
of homogeneous deformaton, then
if
the
uniform
elongationof the tested material
is
lower than20 ,
strain vaiues of 15%
to 20 can
be appìid The
strain
level
shaìl
be
given as
index
y
The orientation of the
testpiece r e w e o the roiling direction shaìl be given
as indexs seeA.1.2 .
Lo originalgaugelength
L Gauge length &r stmhing to
a
specified elongation
mm
mm
Gauge
width of thetest piece after
strainin9 to
a mecifed elongation
mm
r
rzIv
Plastic strain
ratio
Plastic strain ratio
in
directionx
in
degrees) relative
to
the rolling
direction for the strain level?I
7
)
E
Q
Weighted average of rdgd u e s
?hiethicknessbrain
?hiewidthstrain
Q BSI
1998opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--` ` ` ,-` -` , ,` , ,` ,` , ,` ---
-
8/17/2019 BS-10139 1998
13/15
~
S T D B S I
B S EN LOL39-ENGL
li778 =
LbZLibbS 0708773
O T L
Designation
I
Page 11
EN 101391997
A.6.6 Mount the test piece in the grips of the testing
w h i n e and apply the load in accordance withA.6.4:
a)
to
achieve the prescribed
stralli
(manuai
determination);
b) to determine the
width
d u e s
at
the prescribed
strain
level (automaljc determinaíion).
A.6.6 For
manual determination after removing the
load measure the gauge length and gauge width b in
the same manner and to the same tolerance as for
original values.
A.6.7 For automatic determination the measurements
of
length and width
at
the prescribed
stralli
level are
made according to
A 4 2
A.6.8 For
m u a ì
detemünaîion calculate the plastic
strajn
ratio
in
accordance with
A.1.2.
A.6.9 For automatic determination the plastic strain
ratio is obtained directiy using an automatic tensile
testing machine and data processing program. The
elastic slmins
(in
both width and length directions)
shall
be considered.
A.6.10 Calculate the weighted average (see A.1.3 .
A.6 Interpretation
of
results
A.6.1 Determined values of plastic strain
ratio T shall
be rounded
to0,05.
A.6.2
If
the
test
piece shows
any
mnsveme bow,
which could influence the test results, the
test
shall be
considered invalid and
a
new
test
shall be carried out.
A.6.3 If the plasüc
slmh
was inhomogeneous, the
test results shall be considered invalid
and a
new t st
s h d be carried out.
A.6.4
In
case of dispute the testing shall be carried
out
with
three test pieces of specified orientation
relative to the rolling
direction.
The average value of
the
three
tests
shall
be considered.
A.7 Test report
The orientation of the applied strain relative to the
rolling direction shall
be
added as an index figure5
The applied strain value,
if
not
20
, shall be give
as
an
index figure y
B.1.3 The symbol
n
shall be completed by an index
figurex giving the orientation
of
the
test
piece relative
to the rolling direction and by an index
figure
y
giving
the upper limit of the strain range
if
the latter
is
not
the standard value of 20
.
B.1.4 The weighted average of n, values
is
calculated
using the formula.
n45/18
no +
o +
2n45
4
B.2 Principle
The test involves uniaxkd tensile s tmin ing
of
the
test
piece at the prescribed rate in the interval including
the region of the uniform plastic strain.
The
strain
hardening exponent
is
determined within
the strain range of 10 to
2096
As he determination
shall
be
carried out in the range of homogeneous
deformation, then if the uniform elongation of the
tested
material
is
lower than
20
ohvalues for the upper
limit of the strain range of
15 to
20 can be applied
Table B. l
f i =
3ymbol Unit
Original extensometer gauge length
of the
test
piece
CO
c
Instasitaneo& gasëlength of the
test
piece after instantaneous action
of
the force
F
mm
Original
m s s
section of the gauge
part
of the test piece
Instantaneoüs cross section of the
gauge part of the test piece after
instantaneous action of the force
F
L O
s =
so-
L
Instantaneous true strain after
instantaneous action of the force F
L
E = ln-
LO
Instantaneous true
stress
after
instaneous action of the force
F
F L
c = -
x -
Lo so
Instantaneous force applied to the
test piece
Annex
B
(normative)
Method of
determination of strain
hardening exponentn
NOTE
his annex
is based
upon
the
procedures
being
developed
by ISOiTC164BC2.
B.l Definition, symbols and designations
B.l.l Symbols and designations used in determjning
the strain hardening exponent are given
in
làble B.l.
B.1.2 The strain hardening exponent n
s
defined as
an exponent
in
the mathematical equalion of the
relation between true
stress
and true
strain
(during
uniaxial application of the force):
F
N
Strain
hardening exponent
Strength coefficient
Strain hardening exponent ratio in
directionx (in degrees) relative to
the rolling direction for the
strain
level y
Weighted average of
n.
values
N
Number of measurements for
determination of strain hardening
exponent
o=
En
i n o = l n K + n l n e
or in
the
logarithmic form:
'1
in
some
countries
n,
is
used instead
of
a.
O BSI 1998
opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--```,-`-`,,`,,`,`,,`---
-
8/17/2019 BS-10139 1998
14/15
STD-BSI
BS
E N L O L 3 9 - E N G L
998 =
L b 2 9 b b S 0708779 T 3 8
Euronorm
5
Page 12
EN 101391997
Germany
France United I d Y
Belgium
Sweden S P h
Kingdom
DIN
NF
BS
UNI
NJ3N
ss UNE
50133
Ao3154 427 1955
All-107 - 7423
in
this
case
the upper
strain
limit shall be given as
index
y
(see B.1.3 .
B.3
Testing
equipment
B.3.1 The testing machine and method of gripping
shaìl comply with the requirements of EN 10002:
Parîsland2.
B.3.2 The
accuracy
of the extensometer used shall be
class 1or better accordingto EN 10002-4.
B.4
Test
piece
B.4.1 The sampling and preparation of the test piece
shall be in accordance with EN 10002:Part 1,the test
piece type is no 2
(80d 0
m).
B.4.2 The gauge length shallbe between
50
nun
and
80 mm
but preferably
80
mm.
The gauge length
shall
be measured
within
Q,Ol
mm
using
a
device
B.6 Procedure
B.6.1 in general, the test is carried out
at
ambient
temperature between 10 C and 35 C. 'ksls carried out
under controlled conditions
shall
be made at a
temperaimeof 23 C
f
5 C.
B4.2 The test piece shail be mounted in the
testing
machineso that the force can be applied axially in
accordance
w i t h
EN lOOO2Part
1.
B 6 3
The
speed
of
the machine,
as
defined by the
speed
of separation of the
crossheads
of the machine,
expressed
as
a
percentage of the parallel length per
minute,shall in no case exceed50.This speed
sh ll
be
kept constant in the time in tend over which the
tensile
hardening exponent
is
cal-
B.6.4 The force and corresponding
shain
&ali be
recoded
at
a minimum of 5 points, distributedat equal
distances
within
the simin range of 10% to20% (10%
to 15
...18
refer to B.2 for whkh the
strain
hardening exponent is
calculated.
havillgadequab?accuracy
B.6.6 From the values of the force and the
correspondingstrain the true stress
shall
be calculated
using the form&
and the true
strain shail
be calculated
using
the
formula:
L
&=In-
O
and the logarithms of these values
shall
be obtained
B.6.6 The n value is calculatedusing the formda
given below, the standard formula for calculabng the
inclination of
a
stmight line using the statistical
method of
least
squares:
where
with
Y = A x B
y = lna
x = n e
A = n
B = h K
B.6.7 Calculated values of the strain hardening
exponent,n hali
be
rounded
to
0,005.
B.6.8
In
the case of
dispuk
the testi ng
shall
be
carried out with three test pieces of the specified
orientation r e w e
o
the r o h g direction. The avemge
value of the
three
tests
shall
be considered.
B.6 Test report
The orientation of the appìied
strajn
relative
to
the
roiling directionshall be added as an index figure x,
the upper
limt
of the appiiedstrajn range, if not 20
shallbe given as an index figure y
Annex C
(inforniative)
List
of
national
standards
complying
with
the Euronorms given in the references
=
-
)
Una they are transformed into Europeanstandards,either the Euronorms or the correspondingnational
standards
given in 'ïàble C.l may
be
used
Table C . l - Euronorms and corresponding national standards
I l I I I I
18
- IA
OS111
I 1449/1 I UNI-EU
18
I A
o3001
I 110120
I
11
0105
49
l -
I- 1
l -
I -
IISO4288
O
BSI 1998opyright European Committee for Standardizationrovided by IHS under license with CEN
Not for Resaleo reproduction or networking permitted without license from IHS
--`
` ` ,-` -` , ,` , ,` ,` , ,` ---
-
8/17/2019 BS-10139 1998
15/15
~
STD-BSI B S
EN 1 O L 3 9 - E N G L 1998
l b 2 L i b b 9
0708775
77Li
BS EN
101391998
BSI
389ChiswickHighW
London
w 4AL
BSI ritish Standards Institution
BSI
is
the independentnal ionalbody responsible for preparing BritishStandards. t
presents the TJK view on standards n
Europe
and at the int~rnatiodevel. It is
incorporated by Royal Charter.
Revisions
British Standards are updated by amendment or revision. Users of BritishStandards
should make sure
that
they
possess
he latest amendmentsor editions.
It is the constant
aim
of BSI
to
improve the quality of ourproducts andservices.We
would be
grateful if
anyone
finding an
naccuracyor ambiguity while using
th s
British
Standard would inform the Secretary of the
technid committee
responsible,
the identity
of
which can be found on the inside front cover. Tel 0181996 9000.
Fax: 0181
996
7400.
BSI offersmembers an individual updating serviced e d PLUSwhich ensures
that
subscribers automaticallyreceive he latest editions of
standards.
Buying standards
Orders for
all
BSI,
intedonal and
oreignstandardspublications should be
addresed
to Customer
Services.
Tel 0181996
7000.
Fax: 0181
9967001.
In response to orders for
international standards,
it is BSI policyto supply the BSI
implementation
of
those
hat
have been published
as
British Standards,
unless
otherwise requested.
Information
on
standards
BSI provides
a
wide range of infomation on
national, European
and
internationai
standards
through
ts Library
and its
Technid
Help
to Exporters
Service.
Various
BSI electronic informationservicesare also available which give details onall its
products and services.Contact
the
Information Centre. Tel:0181
996
7111.
Fax 0181
996
7048.
Subscribing
members of BSI are kept up
to date
with
standards
developments and
receive substantial
discounts
on the purchase price of standards. For details
of
these and other benefits contact Membership
Admhktmh
on.Tek 0181996 7002.
Fax 0181
996
701.
Copyright
Copyright subsists in
ll
BSI publications. BSI also holds the copynght,
in
the UK, f
the publications of the internationai standardhlion
bodies.
Except aspermitted
under the Copyright, Designs and PatentsAct 1988 no extractmay
be
reproduced,
stored in aretrieval system or t ransmaed inany form or by
any
means - electronic,
photocopying, recording or otherwise
-
without prior written permissionh m BSI.
This
does not preclude the
fnx
use,
in
the
course
of implementing the
standard,
of
necessary details suchassymbols, and size, typeor grade designations. if these
detailsare
to
be used for
any
other purpose
than
implementation
then
the prior
writîen permission
of BSI
must be obtained
if
permission is
granted,
the terms may ncluderoyaltypayments or
a
licensing
agreemennt. Details and advicecan be obtainedfrom the Copyright Manager.
Tek
0181
996
7070.
--` ` ` ,-` -` , ,` , ,` ,` , ,` ---