EN ISO 2566-2:1999
(Main)Steel - Conversion of elongation values - Part 2: Austenitic steels (ISO 2566-2:1984)
Steel - Conversion of elongation values - Part 2: Austenitic steels (ISO 2566-2:1984)
Specifies a method of converting room temperature percentage elongations after fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths. The conversions are not applicable to cold reduced steels, quenched and tempered steels and non-austenitic steels, or where certain tensile strength ranges and dimensions are exceeded.
Stahl - Umrechnung von Bruchdehnungswerten - Teil 2: Austenitische Stähle (ISO 2566-2:1984)
Dieser Teil von ISO 2566 legt ein Verfahren für die Umrechnung von prozentualen Dehnungswerten nach erfolgtem Bruch bei Raumtemperatur fest, bei dem Bruchdehnungswerte, die bei verschiedenen proportionalen und nicht-proportionalen Meßlängen ermittelt wurden, auf andere Meßlängen umgerechnet werden. Die Gleichung, die den Umrechnungen zugrunde liegt, gilt als zuverlässig, wenn sie auf rostbeständige austenitische Stähle im Zugfestigkeitsbereich von 450 bis 750 N/mm2 und im lösungsbehandelten Zustand angewendet wird.
Acier - Conversion des valeurs d'allongement - Partie 2: Aciers austénitiques (ISO 2566-2:1984)
Prescrit les exigences à respecter par les fabricants de
transformateurs et d'inductances destinés aux équipements
électroniques afin d'obtenir l'agrément de savoir-faire et définit
les programmes d'essais à effectuer sur les composants pour
l'évaluation de ce savoir-faire.
Jekla - Pretvarjanje vrednosti raztezkov - 2. del: Avstenitna jekla (ISO 2566-2:1984)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2000
Jekla - Pretvarjanje vrednosti raztezkov - 2. del: Avstenitna jekla (ISO 2566-2:1984)
Steel - Conversion of elongation values - Part 2: Austenitic steels (ISO 2566-2:1984)
Stahl - Umrechnung von Bruchdehnungswerten - Teil 2: Austenitische Stähle (ISO 2566-
2:1984)
Acier - Conversion des valeurs d'allongement - Partie 2: Aciers austénitiques (ISO 2566-
2:1984)
Ta slovenski standard je istoveten z: EN ISO 2566-2:1999
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
2566/Z
International Standard
INTERNATIONAL ORGANIZATION FOR STANOAROIZAT~ONWII~EM~YHAPO~HAR OPfAHM3AL&lfl I-IO CTAH~APTH3ALWWORGANlSATlON INTERNATIONALE DE NORMALISATION
Steel - Conversion of elongation values -
Part 2: Austenitic steels
Acier - Conversion des valeurs d’allongement - Partie 2: A tiers aus tbitiques
First edition - 1984-06-01
UDC 669.14 : 620.172
Ref. No. IS0 2566/2-1984 (E)
Descriptors :
metals, steels, austenitic steels, tests, tension tests, elongation, test specimens.
Price based on 28 pages
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of developing International
Standards is carried out through IS0 technical committees. Every member body
- interested in a subject for which a technical committee has been authorized has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 2566/2 was developed by Technical Committee ISO/TC 17,
Steel, and was circulated to the member bodies in April 1983.
It has been approved by the member bodies of the following countries:
Australia Poland
Hungary
Austria India Romania
Belgium South Africa, Rep. of
Iran
Bulgaria Italy Spain
Canada Tanzania
Kenya
China Korea, Dem. P. Rep. of Thailand
Turkey
Czechoslovakia Korea, Rep. of
Finland Mexico United Kingdom
France Netherlands USSR
Germany, F. R. Norway
The member body of the following country expressed disapproval of the document
technical grounds :
Sweden
0 International Organization for Standardization, 1984
Printed in Switzerland
IS0 2566/2-1984 (E)
INTERNATIONAL STANDARD
Steel
- Conversion of elongation values -
Part 2: Austenitic steels
0 introduction These conversions are not applicable to
a) cold reduced steels;
Several different gauge lengths are commonly in use for the
determination of percentage elongation of steels in tensile
b) quenched and tempered steels;
testing. Fixed gauge lengths of 50, 80, 100 and 200 mm are
used; proportional gauge lengths of k Gare also used for flat
and round test pieces, where k may be one of a number of
c) non-austenitic steels.
values, i.e. 4; 5,65; 8,16; and 11,3.
Neither should they be used where the gauge length exceeds
25a or where the width to thickness ratio of the test piece
The value 5,651/S0 is adopted as the internationally preferred
exceeds 20.
proportional gauge length.
Care should be exercised in the case of strip under 3 mm
Arising from this choice and the existence of specifications
thickness, as the index in the formula given in clause 4 in-
stipulating minimum percentage elongations on different gauge
creases with decreasing thickness; the value to be used shall
lengths, a growing need has been evident for an International
be the subject of agreement between the customer and the
Standard which could be used to convert test results into
supplier.
values based on the different gauge lengths. This part of
IS0 2566 accordingly includes tables of conversion factors,
tables of actual conversions for some of the most commonly
used gauge lengths and elongation values, and figures which
2 Symbols
may also be used for such conversions. When using these con-
versions, however, note should be taken of the limitations on
In this part of IS0 2566, the symbols shown in table 1 are used.
their applicability as stated in clause 1.
Table 1 - List of symbols
While, as indicated, the conversions are considered to be
reliable within the stated limitations, because of the various fac-
Symbol
Description
tors influencing the determination of percentage elongations,
A Percentage elongation on gauge length, L,,
they shall be used for acceptance purposes only by agreement
after fracture, obtained on test
between the customer and supplier.
Percentage elongation on a different gauge length,
required by conversion
In cases of dispute, the elongation shall be determined on the
d Diameter of test piece
gauge length stated in the relevant specification.
Original gauge length
LO
Original cross-sectional area of test piece
SO
1 Scope and field of application
3 Definitions
For the purpose of this part of IS0 2566, the following defini-
This part of IS0 2566 specifies a method of converting room
tions apply :
temperature percentage elongations after fracture obtained on
various proportional and non-proportional gauge lengths to
other gauge lengths.
3.1 gauge length : Any length of the parallel portion of the
test piece used for measurement of strain.
The formula (see clause 4) on which conversions are based is
considered to be reliable when applied to austenitic stainless
The term is hereafter used in this part of IS0 2566 to denote the
steels within the tensile strength range 450 to 750 N/mm2 and
original gauge length, L,, marked on the test piece for the
in the solution treated condition.
determination of percentage elongation after fracture, A.
is0 2566/2-1984 (El
onwersion from a pro
32 q proportional gauge length: A gauge length having a
specified relation to the square root of the cross-sectional area, th to a non-proportion
for example 5,65fi.
The conversion factors are variable according to the cross-
sectional area of the non-proportional test piece. Table 4 gives
non-proportional gauge length: A gauge length not
33 II
the multiplying factors for conversion from elongation on
specifically related to the cross-sectional area of the test piece,
5,656 to the equivalent on fixed gauge lengths of 50,80, 100
usually expressed in a given dimension, for example 50 mm.
and 200 mm for a range of cross-sectional areas. For conver-
sions in the reverse direction, i.e. elongation on a fixed gauge
length to the equivalent of 5,65&, the reciprocal of the fac-
tors is used.
4 Basic formula
The data contained in this part of IS0 2566 are based on a for-
Example:
mula obtained from a statistical assessment of international test
results, which, in a simplified form, can be expressed as
5,65 & is equivalent
Elongation of 20 % on to
20 x 1,046 = 20,9 % on a 25 mm wide test piece of 6 mm
thickness wi th a 50 mm gal Age length (see table 4).
From the example shown it will be seen that conversions in-
volving other proportional gauge lengths can be obtained by
prior or subsequent use of the factors shown in table 2.
is the required elongation on gauge length Lo;
be used to obtain some of these conver-
Tables 7 to 10 can
is the elongation on a gauge length of 5,65dSo which is
A
sions, whilst tables 15 to 18 can be used to obtain elongations
the internationally accepted gauge length;
on fixed gauge leng ths corresponding to 5,656.
are defined in table 1.
So and Lo
Similarly, tables 11 to 14 can be used for conversion to4JS,
and tables 19 to 22 for elongations on fixed gauge len gths cor-
Expressed in terms of 42/S, the formula becomes
responding to 4
8 Conversion from a non-proportional gauge
where A is the elongation on a gauge length of 4a/Se.
length to another non-proportional gauge
length for test pieces of different cross-
Tables 2 to 22 and figures 1 to 5 have been prepared on the
sectional areas
basis of the above formulae.
It is preferable for this calculation to be made in two stages with
an initial conversion to 5,656.
5 Conversion from one proportional gauge
length to another proportional gauge length Example:
Simple multiplying factors based on the formula are used for
Elongation of 24 % on 200 mm for a 40 mm x 15 mm test
such conversions, and the relationships between a number of
piece in terms of equivalent on a 30 mm x 10 mm test piece
the more widely used proportional gauge lengths are given in
with gauge lengths equal to 200, 100, and 50 mm.
table 2. Detailed conversions of elongations obtained on 4&
to 5,656 are given in table 6.
24 x 110,957 = 25,l % on 5,656 (see table 4)
25,l x 0,916 = 23,0 % on 30 mm x 10 mm with 200 mm
gauge length
6 Conversion from one non-proportional
gauge length to another non-proportional
25,l x 1,000 = 25,l % on 30 mm x 10 mm with 100 mm
gauge length for test pieces of equal cross- gauge length
sectional area
25,l x 1,093 = 27,4 % on 30 mm x 10 mm with 50 mm
gauge length
The conversion of elongation values of different fixed gauge
lengths on test pieces of equal cross-sectional area are also
made by simple factors. Conversion factors for gauge lengths Elongation on other proportional gauge lengths can be ob-
of 50, 80, 100 and 200 mm are given in table 3. tained by using the factors given in table 2.
IS0 2566/2-1984 (E)
where K, and K2 designate the proportionality ratios of any two
9 Use of figures 1 to 5
test pieces.
9.1 Figures 1 to 5 may be used as an alternative quick method
Ll
K, =
to obtain elongation conversions.
Js,
L2
9.2 Figures 1 to 4 may be used for conversions between
K2 =
5,65& and 50 mm, 5,656 and 200 mm, 4& and
fl 2
50 mm, and 4&and 200 mm gauge lengths, respectively.
Figure 5 shows the values of AI.2 = (KllK2)0~127m
,
Example: To use figure 5 it is necessary to perform the following opera-
tions :
To find the equivalent elongation on 5,65fio and 4& to an
a) calculate the value of proportionality K, = (L,/fi,)
elongation of 25 % on a 200 mm gauge length of a
and (K2 = L21~2~ for two test pieces;
25 mm x 12,5 mm test piece of cross-sectional area
312,5 mm2.
b) read graphically the coefficient j11.2 = (Kl/K2)o~127;
I
c) the elongation obtained is A2 = ill., x A,.
The intersection of this ordinate with the abscissa representing
I
an elongation of 25 % on a 200 mm gauge length lies on the
sloping line representing an elongation of 27,2 % on 5,65fio
Example:
on figure 2 and at a position relative to the sloping lines on
Elongation of 24 % on 200 mm for a 40 mm x 15 mm test
figure 4 approximating to an elongation of 28,8 % on 4&.
piece in terms of equivalent on a 30 mm x 10 mm test piece
with a gauge length equal to 100 mm.
9.3 Figure 5 may be used for the calculation of all elongation
conversions.
- =
a) K1 = ~ ~~00 = 8,16
The formula given in clause 4 may be rewritten as
K2=-=---=
0,127
=A, !?'
A2
/ \
iK2/
b) From figure 5, Al.2 = 1,04.
,
=
c) Elongation required is 24 x 1,04 = 25,0 %.
4.2 x Al
I
Table 2 - Conversion factors : Proportional gauge lengths
Factor for conversion to:
Conversion
from :
4d 5d 8d
565 A/& wJ& ll,3A&
4J&
0,985 0,957 0,902
46 1,000 0,957 0,913 0,876
565 6 1,045 1,000 0,954 0,916 1,029 1,000 0,942
83Jq 1,095 1,048 1,000 0,959 1,078 Lo4-8 0,987
1,000 1,124 1,092 1,029
II,36 1,141 1,092 1,042
0,972 0,928 0,890 1,000 0,972 0,916
4d 1,015
5d 1,045 1,000 0,954 0,916 1,029 1,000 0,942
1,013 0,972 1,092 1,062 1,000
8d 1,109 1,061
Table 3 - Conversion factors 9) Non-proportional gauge lengths
Factor for conversion to:
Conversion from:
50 mm 80 mm 100 mm 200 mm
0,942 0,916 0,839
50mm 1,000
80 mm 1,062 1,000 0,972 0,890
1,000 0,916
100 mm 1,092 1,029
1,123 1,092 1,000
200 mm 1,193
1) Provided cross-sectional areas are the same.
IS0 2566/2-1984 (El
Table 4- Conve rsion factors from 5,65 to non- rtional gauge lengths
Prop0
Factors shown under “non-proportional gauge lengths” give the value of
0,127
To convert from values on a length of 5,65,&j to a non-proportional length, multiply by the appropriate factor.
w-w SFWW
from to 5,65&, divide by the appropriate factor.
To convert values on a non-proportional length
WJW
See also figures 1 and 2.
Cross-sectional
Factor for non-proportional gauge length of:
area of test piece
mm2 200 mm 100 mm 80 mm 50 mm
5 0,706 0,771 0,794 0,842
10 0,738 0,806 0,829 0,880
15 0,827 0,851 0,903
0,757
20 0,771 0,842 0,867 0,920
25 0,782 0,854 0,879 0,933
30 0,792 0,864 0,944
o,=
35 0,779 0,873 0,898 0,953
40 0,806 0,906 0,961
o,=o
45 0,812 0,887 0,912 0,969
50 0,818 0,893 0,919 0,975
55 0,823 0,898 0,924 0,981
60 0,827 0,903 0,929 0,986
70 0,835 0,912 0,938 0,996
0,920
80 0,842 0,946 1,005
90 0,927 0,953 1,012
0,849
loo 0,854 0,933 0,960 1,019
110 0,860 0,939 0,966 1,025
120 0,864 0,944 0,971 1,031
130 0,949 1,036
0,869 0,976
140 0,873 0,953 0,981 1,041
150 0,877 0,957 0,985 1,045
0,961
160 or=0 0,989 1,050
170 0,965 0,993 1,054
0,884
180 0,887 0,969 0,996 1,058
190 0,890 0,972 1,061
1,m
200 0,893 0,975 1,003 1,065
210 0,978
0,896 1,006 1,068
220 0,898 0,981 1,071
1,009
230 0,901 0,984 1,012 1,074
240 0,903 0,986 1,015 1,077
250 0,906 0,989 1,017
W@
260 1,020
0,991 l,ofQ
o,=
270 0,910 0,994 1,022 1,085
280 0,912 0,996 1,025
Lo=
290 0,914 0,998 1,027 1,090
300 0,916 1,029 1,093
Loo0
310 0,918 1,003 1,031 1,095
320 0,920 1,005 1,033 1,097
330 0,922 1,007 1,035 1,099
340 0,923 1,008 1,037 1,101
350 0,925 1,010 1,039 1,103
1,012 1,041
360 0,927 1,105
370 0,928 1,014 1,043 1,107
380 0,930 1,016 1,045 1,109
390 0,932 1,017 1,047 1,111
Table 4 (concluded) - Conversion factors from 5,65& to non-proportional gauge lengths
Cross-sectional
Factor for non-proportional gauge length of:
area of test piece
mm2 200 mm 100 mm 80 mm 50 mm
400 0,933 1,019
...
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