EN ISO 2566-1:1999
(Main)Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1:1984)
Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1:1984)
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 austenitic steels, or where certain tensile strength ranges and dimensions are exceeded.
Stahl - Umrechnung von Bruchdehnungswerten - Teil 1: Unlegierte und niedrig legierte Stähle (ISO 2566-1:1984)
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 unlegierte Stähle, Kohlenstoff-Mangan-, Molybdän- und Chrom-Molybdän-Stahl im Zugfestigkeitsbereich von 300 bis 700 N/mm2 und im warmgewalzten, warmgewalzten und normalgeglühten oder geglühten Zustand angewendet wird.
Acier - Conversion des valeurs d'allongement - Partie 1: Aciers au carbone et aciers faiblement alliés (ISO 2566-1:1984)
Spécifie les dimensions qui sont importantes pour l'interchangeabilité mécanique d'une gamme préférentielle de noyaux PM en oxydes magnétiques et les principales dimensions des carcasses associées.
Jekla - Pretvarjanje vrednosti raztezkov - 1. del: Ogljikova in malolegirana jekla (ISO 2566-1:1984)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2000
Jekla - Pretvarjanje vrednosti raztezkov - 1. del: Ogljikova in malolegirana jekla
(ISO 2566-1:1984)
Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-
1:1984)
Stahl - Umrechnung von Bruchdehnungswerten - Teil 1: Unlegierte und niedrig legierte
Stähle (ISO 2566-1:1984)
Acier - Conversion des valeurs d'allongement - Partie 1: Aciers au carbone et aciers
faiblement alliés (ISO 2566-1:1984)
Ta slovenski standard je istoveten z: EN ISO 2566-1:1999
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.
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEMI(nYHAPO~HAR OPTAHH3Al&lR I-IO CTAH~APTM3AWlH~RGANlSATlON INTERNATIONALE DE NORMALISATION
Steel - Conversion of elongation values -
Part 1 I Carbon and low alloy steels
Acier - Conversion des valeurs d’allongement - Partie 7 : Aciers au carbone et aciers faiblemen t a/Ii&s
Second edition - 1984-08-01
ti
-
UDC 669.14 : 620.172
Ref. No. IS0 2566/1-1984(E)
p
Descriptors : metals, steels, unalloyed steels, low alloy steels, tests, tension tests, test specimens, elongation.
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 2!566/ 1 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
Hungary Poland
Austria
India Romania
Belgium
Iran South Africa, Rep. of
Bulgaria
Italy Spain
Canada
Japan Tanzania
China
Kenya Thailand
Czechoslovakia Korea, Dem. P. Rep. of Turkey
Egypt, Arab Rep. of
Korea, Rep. of United Kingdom
Finland
Mexico USSR
France
Netherlands
Germany, F. R.
Norway
The member body of the following country expressed disapproval of the document on
tech nical grounds :
Sweden
This second edition cancels and replaces the first edition (i.e. IS0 2566/l-1973).
@ International Organization for Standardization, 1984 0
Printed in Switzerland
IS0 2566/l-1984 (E)
INTERNATIONAL STANDARD
Steel - Conversion of elongation values -
steels
Part 1: Carbon and low alloy
0 Introduction These conversions are not applicable to
Several different gauge lengths are commonly in use for the
a) cold reduced steels;
determination of percentage elongation of steels in tensile
testing. Fixed gauge lengths of 50, 80, 100 and 200 mm are
b) quenched and tempered steels;
used; proportional gauge lengths of k G are also used for flat
and round test pieces, where k may be one of a number of
c) austenitic steels.
values, i.e. 4; 5,65; 8,16; and 11,3.
Neither should they be used where the gauge length exceeds
The value 5,656 is adopted as the internationally preferred
256 or where the width to thickness ratio of the test piece
proportional gauge length.
exceeds 20.
Arising from this choice and the existence of specifications
Care should be exercised in the case of strip under 4 mm
stipulating minimum percentage elongations on different gauge
thickness, as the index in the formula given in clause 4 in-
lengths, a growing need has been evident for an International
creases with decreasing thickness; the value to be used shall
Standard which could be used to convert test results into
be the subject of agreement between the customer and the
values based on the different gauge lengths. This part of
supplier.
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
may also be used for such conversions. When using these con- 2 Symbols
versions, however, note should be taken of the limitations on
their applicability as stated in clause 1.
In this part of IS0 2566, the symbols shown in table 1 are used.
While, as indicated, the conversions are considered to be
Table 1 - List of symbols
reliable within the stated limitations, because of the various fac-
tors influencing the determination of percentage elongations,
Symbol Description
they shall be used for acceptance purposes only by agreement
A Percentage elongation on gauge length, L,,
between the customer and supplier.
after fracture, obtained on test
Percentage elongation on a different gauge length,
A,
In cases of dispute, the elongation shall be determined on the
required by conversion
gauge length stated in the relevant specification.
d Diameter of test piece
Original gauge length
LO
Original cross-sectional area of test piece
SO
1 Scope and field of application
3 Definitions
This part of IS0 2566 specifies a method of converting room
temperature percentage elongations after fracture obtained on
For the purpose of this part of IS0 2566, the following defini-
various proportional and non-proportional gauge lengths to
tions apply :
other gauge lengths.
3.1 gauge length: Any length of the parallel portion of the
The formula (see clause 4) on which conversions are based is
considered to be reliable when applied to carbon, carbon test piece used for measurement of strain.
manganese, molybdenum and chromium molybdenum steels
within the tensile strength range 300 to 700 N/mm2 and in the
The term is hereafter used in this part of IS0 2566 to denote the
hot-rolled, hot-rolled and normalized or annealed conditions,
original gauge length, L,, marked on the test piece for the
with or without tempering.
determination of percentage elongation after fracture, A.
IS0 2566/l-1984 (E)
proportional gauge length: A gauge length having a 6 Conversion from one non-proportional
3.2
specified relation to the square root of the cross-sectional area,
gauge length to another non-proportional
for example 5,656
gauge length for test pieces of equal cross-
sectional area
3.3 non-proportional gauge length: A gauge length not
The conversion of elongation values of different fixed gauge
specifically related to the cross-sectional area of the test piece,
usually expressed in a given dimension, for example 50 mm. lengths on test pieces of equal cross-sectional area are also
made by simple factors. Conversion factors for gauge lengths
of 50, 80, 100 and 200 mm are given in table 3.
4 Basic formula
7 Conversion from a proportional gauge
The data contained in this part of IS0 2566 are based on the
length to a non-proportional gauge length
Oliver formula, I) which is now widely used for such elongation
conversions.
The conversion factors are variable according to the cross-
sectional area of the non-proportional test piece. Table 4 gives
The Oliver formula can, in a simplified form, be expressed as
the multiplying factors for conversion from elongation on
5,65&to the equivalent on fixed gauge lengths of 50,80, 100
and 200 mm for a range of cross-sectional areas. For conver-
A, =
sions in the reverse direction, i.e. elongation on a fixed gauge
length to the equivalent of 5,656, the reciprocal of the fac-
tors is used.
is the required elongation on gauge length Lo;
Examples:
A is the elongation on a gauge length of 46; a) Elongation of 20 % on 5,65fio is equivalent to
20 x 1,139 = 22,78 % on a 25 mm wide test piece of
6 mm thickness with a 50 mm gauge length (see table 4);
So and Lo are defined in table 1.
b) Elongation of 25 % on a 40 mm x 10 mm test
This formula gives a direct conversion of elongation on 4G
piece of 200 mm gauge length is equivalent to
to the equivalent for a test piece of cross-sectional area So, and
25 x 110,796 = 31,4 % on 5,65fi (see table 4).
a gauge length Lo. Expressed in terms of 5,656, which is
now regarded as the internationally accepted standard gauge
From the examples shown it will be seen that conversions in-
length, it becomes
volving other proportional gauge lengths can be obtained by
prior or subsequent use of the factors shown in table 2.
a4
Tables 7 to 10 can be used to obtain some of these conver-
sions, whilst tables 15 to 18 can be used to obtain elongations
on fixed gauge lengths corresponding to 5,656.
A is the elongation
where on a gauge length of 5,656.
Similarly, tables 11 to 14 can be used for conversion to 46
Tables 2 to 22 and figures 1 to 5 have been prepared on the
and tables 19 to 22 for elongations on fixed gauge lengths cor-
basis of the above formulae.
responding to 4&.
5 Conversion from one proportional gauge
8 Conversion from a non-proportional gauge
length to another proportional gauge length
length to another non-proportional gauge
length for test pieces of different cross-
Simple multiplying factors based on the formula are used for
sectional areas
such conversions, and the relationships between a number of
the more widely used proportional gauge lengths are given in
It is preferable for this calculation to be made in two stages with
table 2. Detailed conversions of elongations obtained on 4&
an initial conversion to 5,65&.
to 5,65&are given in table 6.
1) OLIVER, D.A. Proc. Inst. Mech. Eng., 11 1928 : 827.
IS0 2566/l-1984 (El
The intersection of this ordinate with the abscissa representing
Example:
an elongation of 21 % on a 200 mm gauge length lies on the
sloping line representing an elongation of 28 % on 5,65&on
Elongation of 24 % on 200 mm for a 40 mm x 15 mm test
figure 2 and at a position relative to the sloping lines on figure 4
piece in terms of equivalent on a 30 mm x 10 mm test piece
approximating to an elongation of 32,2 on 4&
with gauge lengths equal to 200, 100 and 50 mm.
24 x 110,863 = 27,8 % on 5,65& (see table 4).
9.3 Figure 5 may be used for the calculation of all elongation
conversions.
27,8 x 0,752 = 20,9 % on 30 mm x 10 mm with 200 mm
gauge length
The Oliver formula may be rewritten as
27,8 x 0,992 = 27,6 % on 30 mm x 10 mm with 100 mm
gauge length
36,4 % on 30 mm x 10 mm with 50 mm
27,8 x 1,309 =
=
gauge length il,*2 I x Al
where K, and K2 designate the proportionality ratios of any
Elongation on other proportional gauge lengths can be ob-
two test pieces.
tained by using the factors given in table 2.
Ll
K, =
9 Use of figures 1 to 5
9.1 Figures 1 to 5 may be used as an alternative quick method L2
K2 = -
to obtain elongation conversions.
Js
Figure 5 shows the values of AI.2 = MI&) *p4.
9.2 Figures 1 to 4 may be used for conversions between
I
5,65 fi and 50 mm, 5,65G and 200 mm, 4Gand 50 mm
To use figure 5 it is necessary to perform the following opera-
So and 200 mm gauge lengths, respectively.
and 4
P
tions :
Example:
a) calculate the values of proportionality K, = (L,/fi)
and K2 =
(L,IJs,) for two test pieces;
To find the equivalent elongation on 5,65 &and 4 G to an
elongation of 21 % on a 200 mm gauge length of a
b) read graphically the coefficient A1.2 = (K,lK2)*r4;
I
25 mm x 12,5 mm test piece of cross-sectional area
312,5 mm2. c) the elongation obtained is A2 = A,.2 x A,.
I
Table 2 - Conversion factors : Proportional gauge lengths
Factor for conversion to:
I
Conversion
from :
4d 5d 8d
565 fi 11#3Jq
0,661 0,953 0,870 0,721
Loo0 0,870 0,752
4ll$
565 6 0,828
0,863 0,759 1,093 Loo0
1,149 1,000
1,268
8,16l/& 1,330 1,158 1,000 0,879 1,158 0,960
1,000 1,443 1,317 1,091
11,3&j 1,514 1,317 1,137
4d 0,790 0,694 1,000 0,916 0,758
1,050 0,916
5d 0,828
1,093 l,ooo
1,149 1,000 0,863 0,759
8d 0,918 1,319 1,207 1,000
1,389 1,207 1,042
Table 3 - Conversion factors’) : Non-proportional gauge lengths
Factor for conversion to:
Conversion from:
50mm 80 mm 1OOmm 200mm
I
0,829 0,758 0,754
50mm 1,000
0,693
80 mm 1,207 1,000 0,915
1,093 1,000 0,758
1OOmm 1,320
1,000
-1
1,741 1,443 1,320
200mm
1) Provided cross-sectional areas are the same.
IS0 2566/l-1984 (E)
from 5,65& to non-proportional gauge lengths
Table 4- Conversion factors
Factors shown under “non-proportional gauge lengths” give the value of
a4
To convert from values on a gauge length of 5,656 to a non-proportional gauge length, multiply by the appropriate factor.
To convert from values on a non-proportional length to 5,65JsI;, divide by the appropriate factor.
See also figures 1 and 2.
Cross-sectional
Factor for non-proportional length of:
area of test piece
200 mm 100 mm 80 mm 50 mm
mm*
5 0,331 0,437 0,478 0,577
0,502 0,663
10 0,381 o,!=
0,413 0,545 0,596 0,719
0,577 0,761
20 0,437 0,631
25 0,457 0,603 0,660 0,796
30 0,474 0,626 0,826
0,684
35 0,489 0,645 0,706 0,852
40 0,502 0,663 0,725 0,875
45 0,514 0,679 0,742 0,896
0,525 0,693 0,758 0,915
55 0,535 0,706 0,772 0,932
0,719 0,949
60 0,545 0,786
70 0,562 0,741 0,811 0,978
80 0,577 0,761 0,833 1,005
90 0,591 0,780 0,852 1,029
100 0,603 0,796 0,871 1,051
110 0,615 0,812 0,887 1,071
120 0,626 0,826 0,903 1,090
130 0,636 0,839 0,917 1,107
140 0,645 0,852 0,931 1,124
150 0,654 0,863 0,944 1,139
160 0,663 0,875 0,956 1,154
170 0,671 0,885 0,968 1,168
180 0,679 0,896 0,979 1,182
190 0,686 0,905 0,990 1,195
200 0,693 0,915 1,000 1,207
210 0,700 0,924 1,010 1,219
0,932 1,019
220 0,706 1,230
230 0,713 0,941 1,028 1,241
1,037
240 0,719 0,949 1,252
250 0,725 0,956 1,046 1,262
260 0,730 0,964 1,054 1,272
0,971 1,062
270 0,736 1,281
280 0,741 0,978 1,070 1,291
1,077
290 0,747 0,985 1,300
300 0,752 0,992 1,084 1,309
310 0,757 0,998 1,092 1,317
320 0,761 1,005 1,099 1,326
330 0,766 1,011 1,105 1,334
340 0,771 1,017 1,112 1,342
350 0,775 1,0
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.