prEN ISO 2566-1

Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO/FDIS 2566-1:2021)

MINOR REVISION

Stahl - Umrechnung von Bruchdehnungswerten - Teil 1: Unlegierte und niedrig legierte Stähle (ISO/FDIS 2566-1:2021)

Dieses Dokument 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 (1), die den Umrechnungen zugrunde liegt, gilt als zuverlässig, wenn sie auf unlegierte Stähle, Kohlenstoff-Mangan-, Molybdän- und Chrom-Molybdän-Stahl im Zugfestigkeitsbereich von 300 N/mm2 bis 700 N/mm2 und im warmgewalzten, warmgewalzten und normalgeglühten oder geglühten Zustand, mit oder ohne Anlassen, angewendet wird.
Diese Umrechnungen sind nicht anwendbar auf:
a) kaltgewalzte Stähle;
b) vergütete Stähle;
c) austenitische Stähle.
Diese Umrechnungen sollten nicht angewendet werden, wenn die Messlänge 25√(S_0 ) überschreitet oder das Verhältnis der Probenbreite zur -dicke größer als 20 ist.

Acier - Conversion des valeurs d'allongement - Partie 1: Aciers au carbone et aciers faiblement alliés (ISO/FDIS 2566-1:2021)

Jekla - Pretvarjanje vrednosti raztezkov - 1. del: Ogljikova in malolegirana jekla (ISO/FDIS 2566-1:2021)

General Information

• Status: Not Published
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: ECISS/TC 101 - Test methods for steel (other than chemical analysis)
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Due Date: 14-Oct-2021
• Completion Date: 14-Oct-2021
• Ref Project: oSIST prEN ISO 2566-1:2021 - Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO/FDIS 2566-1:2021)

RELATIONS

• Revised: EN ISO 2566-1:1999 - Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO 2566-1:1984)
• Effective Date: 10-Jun-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 2566-1:2021
01-oktober-2021

Jekla - Pretvarjanje vrednosti raztezkov - 1. del: Ogljikova in malolegirana jekla

(ISO/FDIS 2566-1:2021)

Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (ISO/FDIS

2566-1:2021)

Stahl - Umrechnung von Bruchdehnungswerten - Teil 1: Unlegierte und niedrig legierte

Stähle (ISO/FDIS 2566-1:2021)

Acier - Conversion des valeurs d'allongement - Partie 1: Aciers au carbone et aciers

faiblement alliés (ISO/FDIS 2566-1:2021)
Ta slovenski standard je istoveten z: prEN ISO 2566-1
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.080.20 Jekla Steels
oSIST prEN ISO 2566-1:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 2566-1:2021
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oSIST prEN ISO 2566-1:2021
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 2566-1
ISO/TC 17/SC 20
Steel — Conversion of elongation
Secretariat: SIS
values —
Voting begins on:
2021-07-22
Part 1:
Voting terminates on:
Carbon and low alloy steels
2021-10-14
Acier — Conversion des valeurs d'allongement —
Partie 1: Aciers au carbone et aciers faiblement alliés
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 2566-1:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms, definitions and symbols ............................................................................................................................................................ 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Symbols ......................................................................................................................................................................................................... 2

4 Basic formula ........................................................................................................................................................................................................... 2

5 Requirements on conversions ................................................................................................................................................................ 2

6 Conversion from one proportional gauge length to another proportional gauge length .........3

7 Conversion from one non-proportional gauge length to another non-proportional

gauge length for test pieces of equal cross-sectional area ........................................................................................ 3

8 Conversion from a non-proportional gauge length to another non-proportional

gauge length for test pieces of different cross-sectional areas ............................................................................ 4

9 Conversion from a proportional gauge length to a non-proportional gauge length ......................4

9.1 General ........................................................................................................................................................................................................... 4

9.2 Conversion factors from 56, 5 S to non-proportional gauge length .................................................. 5

9.3 Conversion factors from 4 S to non-proportional gauge length .......................................................... 8

9.4 Elongation values ...............................................................................................................................................................................10

10 Use of Figures ........................................................................................................................................................................................................26

Bibliography .............................................................................................................................................................................................................................33

© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established 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.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 20, General

technical delivery conditions, sampling and mechanical testing methods, in collaboration with the

European Committee for Standardization (CEN) Technical Committee CEN/TC 459/SC 1, Test methods

for steel (other than chemical analysis), in accordance with the Agreement on technical cooperation

between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 2566-1:1984), of which it constitutes a

minor revision. The changes compared to the previous edition are as follows:
— complete editorial revision;

— Tables 2 to 5 have been renamed due to reordering in order to follow the logical flow of information

of this document;

— Clause 8 has been restructured into four sub-clauses in order to follow the logical flow of information

of this document.
A list of all parts in the ISO 2566 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Introduction

Several different gauge lengths are commonly in use for the determination of percentage elongation of

steels in tensile testing. Fixed gauge lengths of 50 mm, 80 mm, 100 mm and 200 mm are used;

proportional gauge lengths of kS are also used for flat and round test pieces, where k may be one of

a number of values, i.e. 4; 5,65; 8,16 or 11,3.

The value 56, 5 S is adopted as the internationally preferred proportional gauge length.

Arising from this choice and the existence of specifications stipulating minimum percentage elongations

on different gauge lengths, a growing need has been evident for an International Standard that could be

used to convert test results into values based on the different gauge lengths. Accordingly, this document

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 conversions, however, note should be taken of the limitations on their applicability, as

stated in Clause 1.
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oSIST prEN ISO 2566-1:2021
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oSIST prEN ISO 2566-1:2021
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 2566-1:2021(E)
Steel — Conversion of elongation values —
Part 1:
Carbon and low alloy steels
1 Scope

This document specifies a method of converting room temperature percentage elongations after

fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths.

Formula (1), on which conversions are based, is considered to be reliable when applied to carbon,

carbon manganese, molybdenum and chromium molybdenum steels within the tensile strength range

300 to 700 N/mm and in the hot-rolled, hot-rolled and normalized or annealed conditions, with or

without tempering.
These conversions are not applicable to:
a) cold reduced steels;
b) quenched and tempered steels;
c) austenitic steels.

These conversions are not applicable when the gauge length exceeds 25 S or where the width to

thickness ratio of the test piece exceeds 20.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1.1
gauge length
length of the parallel portion of the test piece used for measurement of strain

Note 1 to entry: The term is hereafter used in this document to denote the original gauge length, L , marked on

the test piece for the determination of percentage elongation after fracture, A.
3.1.2
proportional gauge length

gauge length (3.1.1) having a specified relation to the square root of the cross-sectional area, for

example 5,65 S
© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
3.1.3
non-proportional gauge length

gauge length (3.1.1) not specifically related to the cross-sectional area of the test piece, usually

expressed in a given dimension, for example 50 mm
3.2 Symbols
A Percentage elongation after fracture on a gauge length, obtained on test
A Percentage elongation on a different gauge length, required by conversion
d Diameter of test piece
Original gauge length
Original cross-sectional area of test piece
4 Basic formula
[1]

The data contained in this document are based on the Oliver formula , which is now widely used for

such elongation conversions. The Oliver formula can, in a simplified form, be expressed as Formula (1):

04,
 
AA=17, 4 (1)
 
 0 
where
A is the required elongation on gauge length L ;
r 0
is the elongation on gauge length of 4 S ;
is the original gauge length;
is the original cross-sectional area of test piece.

Formula (1) gives a direct conversion of elongation on 4 S to the equivalent for a test piece of cross-

sectional area S , and a gauge length L . Expressed in terms of 56, 5 S , which is now regarded as the

0 0 0
internationally accepted standard gauge length, it becomes Formula (2):
04,
 
AA=2 (2)
 
 0 
where A is the elongation on gauge length of 56, 5 S .
Tables 1 to 21 and Figures 1 to 5 are based on Formulae (1) and (2).

Care should be exercised in the case of strip under 4 mm thickness, as the index in Formulae (1) and (2)

increases with decreasing thickness; the value to be used shall be the subject of agreement between the

customer and the supplier.
5 Requirements on conversions

While, as indicated, the conversions are considered to be reliable within the stated limitations, because

of the various factors influencing the determination of percentage elongations, they shall be used for

acceptance purposes only by agreement between the customer and supplier.
2 © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)

In cases of dispute, the elongation shall be determined on the gauge length stated in the relevant

specification.
6 Conversion from one proportional gauge length to another proportional gauge
length

Simple multiplying factors based on the formula are used for such conversions, and the relationships

between several of the more widely used proportional gauge lengths are given in Table 1. Detailed

conversions of elongations obtained on 4 S to 56, 5 S are given in Table 2.
0 0
Table 1 — Conversion factors : Proportional gauge length
Factor for conversion to:
Conversion
from: 4d 5d 8d
4 S 56, 5 S 81, 6 S 11,3 S
0 0 0 0
1,000 0,870 0,759 0,661 0,953 0,870 0,721
4 S
1,149 1,000 0,863 0,759 1,093 1,000 0,828
56, 5 S
1,330 1,158 1,000 0,879 1,268 1,158 1,960
81, 6 S
1,514 1,317 1,137 1,000 1,443 1,317 1,091
11,3 S
4d 1,050 0,916 0,790 0,694 1,000 0,916 0,758
5d 1,149 1,000 0,863 0,759 1,093 1,000 0,828
8d 1,389 1,207 1,042 0,918 1,319 1,207 1,000

Table 2 — Elongation values on 56, 5 S corresponding to those obtained on 4 S gauge

0 0
length
Actual elonga-
Corresponding elongation (%) on 56, 5 S
tion (%)
measured on
0 1 2 3 4 5 6 7 8 9
4 S
10 9 10 10 11 12 13 14 15 16 17
20 17 18 19 20 21 22 23 23 24 25
30 26 27 28 29 30 30 31 32 33 34
40 35 36 37 37 38 39 40 41 42 43
50 43 44 45 46 47 48 49 50 50 51
Factor 0,87. Values rounded to nearest whole number.
7 Conversion from one non-proportional gauge length to another non-
proportional gauge length for test pieces of equal cross-sectional area

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 of 50 mm, 80 mm,

100 mm and 200 mm are given in Table 3.
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Table 3 — Conversion factors : Non-proportional gauge length
Factor for conversion to:
Conversion from:
50 mm 80 mm 100 mm 200 mm
50 mm 1,000 0,829 0,758 0,754
80 mm 1,207 1,000 0,915 0,693
100 mm 1,320 1,093 1,000 0,758
200 mm 1,741 1,443 1,320 1,000
Provided cross-sectional areas are the same.
8 Conversion from a non-proportional gauge length to another non-proportional
gauge length for test pieces of different cross-sectional areas

It is preferable for this calculation to be made in two stages with an initial conversion to 56, 5 S .

EXAMPLE

Elongation of 24 % on 200 mm for a 40 mm x 15 mm test piece in terms of equivalent on a

30 mm x 10 mm test piece with gauge lengths equal to 200 mm, 100 mm and 50 mm.
24 x 1/0,863 = 27,8 % on 56, 5 S (see Table 3).
27,8 x 0,752 = 20,9 % on 30 mm x 10 mm with 200 mm gauge length
27,8 x 0,992 = 27,6 % on 30 mm x 10 mm with 100 mm gauge length
27,8 x 1,309 = 36,4 % on 30 mm x 10 mm with 50 mm gauge length

Elongation on other proportional gauge lengths can be obtained by using the factors given in Table 1.

9 Conversion from a proportional gauge length to a non-proportional gauge
length
9.1 General

The conversion factors are variable according to the cross-sectional area of the non-proportional test

piece. Table 4 gives the multiplying factors for conversion from elongation on 56, 5 S to the equivalent

on fixed gauge lengths of 50 mm, 80 mm, 100 mm and 200 mm for a range of cross-sectional areas. For

conversions in the reverse direction, i.e. elongation on a fixed gauge length to the equivalent of 56, 5 S

, the reciprocal of the factors is used.
EXAMPLE

a) Elongation of 20 % on 56, 5 S 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);

b) Elongation of 25 % on a 40 mm x 10 mm test piece of 200 mm gauge length is equivalent to

25 x 1/0,796 = 31,4 % on 56, 5 S (see Table 4).

From the examples shown, it will be seen that conversions involving other proportional gauge lengths

can be obtained by prior or subsequent use of the factors shown in Table 1.
4 © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
9.2 Conversion factors from 56, 5 S to non-proportional gauge length
Factors shown under “non-proportional gauge lengths” give the value of
04,
 
 
 

To convert from values on a gauge length of 56, 5 S to a non-proportional gauge length, multiply by

the appropriate factor.

To convert from values on a non-proportional gauge length to 56, 5 S , divide by the appropriate

factor.
See also Figures 1 and 2.
Table 4 — Conversion factors from 56, 5 S to non-proportional gauge lengths
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
5 0,331 0,437 0,478 0,577
10 0,381 0,502 0,549 0,663
15 0,413 0,545 0,596 0,719
20 0,437 0,577 0,631 0,761
25 0,457 0,603 0,660 0,796
30 0,474 0,626 0,684 0,826
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
50 0,525 0,693 0,758 0,915
55 0,535 0,706 0,772 0,932
60 0,545 0,719 0,786 0,949
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
220 0,706 0,932 1,019 1,230
230 0,713 0,941 1,028 1,241
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Table 4 (continued)
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
240 0,719 0,949 1,037 1,252
250 0,725 0,956 1,046 1,262
260 0,730 0,964 1,054 1,272
270 0,736 0,971 1,062 1,281
280 0,741 0,978 1,070 1,291
290 0,747 0,985 1,077 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 1,023 1,118 1,350
360 0,780 1,029 1,125 1,357
370 0,784 1,034 1,131 1,365
380 0,788 1,040 1,137 1,372
390 0,792 1,045 1,143 1,379
400 0,796 1,051 1,149 1,386
410 0,800 1,056 1,154 1,393
420 0,804 1,061 1,160 1,400
430 0,808 1,066 1,165 1,406
440 0,812 1,071 1,171 1,413
450 0,815 1,076 1,176 1,419
460 0,819 1,080 1,181 1,426
470 0,822 1,085 1,186 1,432
480 0,826 1,090 1,191 1,438
490 0,829 1,094 1,196 1,444
500 0,833 1,099 1,201 1,450
550 0,849 1,120 1,224 1,477
600 0,863 1,139 1,246 1,503
650 0,877 1,158 1,266 1,528
700 0,891 1,175 1,285 1,550
750 0,903 1,191 1,303 1,572
800 0,915 1,207 1,320 1,592
850 0,926 1,222 1,336 1,612
900 0,936 1,236 1,351 1,630
950 0,947 1,249 1,366 1,648
1 000 0,956 1,262 1,380 1,665
1 050 0,966 1,274 1,393 1,681
1 100 0,975 1,286 1,406 1,697
1 150 0,983 1,298 1,419 1,712
1 200 0,992 1,309 1,431 1,727
1 250 1,000 1,320 1,443 1,741
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Table 4 (continued)
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
1 300 1,008 1,330 1,454 1,755
1 350 1,016 1,340 1,465 1,768
1 400 1,023 1,350 1,476 1,781
1 450 1,030 1,359 1,486 1,794
1 500 1,037 1,369 1,496 1,806
1 550 1,044 1,378 1,506 1,818
1 600 1,051 1,386 1,516 1,829
1 650 1,057 1,395 1,525 1,841
1 700 1,063 1,403 1,534 1,852
1 750 1,070 1,411 1,543 1,862
1 800 1,076 1,419 1,552 1,873
1 850 1,082 1,427 1,560 1,883
1 900 1,087 1,435 1,569 1,893
1 950 1,093 1,442 1,577 1,903
2 000 1,099 1,450 1,585 1,913
2 050 1,104 1,457 1,593 1,922
2 100 1,109 1,464 1,600 1,931
2 150 1,115 1,471 1,608 1,941
2 200 1,120 1,477 1,615 1,950
2 250 1,125 1,484 1,623 1,958
2 300 1,130 1,491 1,630 1,967
2 350 1,135 1,497 1,637 1,975
2 400 1,139 1,503 1,644 1,984
2 450 1,144 1,510 1,651 1,992
2 500 1,149 1,516 1,657 2,000
2 550 1,153 1,522 1,664 2,008
2 600 1,158 1,528 1,670 2,016
2 650 1,162 1,533 1,677 2,023
2 700 1,167 1,539 1,683 2,031
2 750 1,171 1,545 1,689 2,038
2 800 1,175 1,550 1,695 2,046
2 850 1,179 1,556 1,701 2,053
2 900 1,183 1,561 1,707 2,060
2 950 1,187 1,567 1,713 2,067
3 000 1,191 1,572 1,719 2,074
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
9.3 Conversion factors from 4 S to non-proportional gauge length
Factors shown under “non-proportional gauge length” give the value of
04,
 
17, 4
 
 

To convert from values on a gauge length of 4 S to a non-proportional gauge length, multiply by the

appropriate factor.

To convert from values on a non-proportional gauge length to 4 S divide by the appropriate factor.

See also Figures 3 and 4.
Table 5 — Conversion factors from 4 S to non-proportional gauge length
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
5 0,288 0,380 0,416 0,502
10 0,331 0,437 0,478 0,577
15 0,359 0,474 0,518 0,625
20 0,380 0,502 0,549 0,662
25 0,398 0,525 0,574 0,693
30 0,413 0,544 0,595 0,718
35 0,426 0,562 0,614 0,741
40 0,437 0,577 0,631 0,761
45 0,447 0,590 0,646 0,779
50 0,457 0,603 0,659 0,796
55 0,466 0,615 0,672 0,811
60 0,474 0;625 0,684 0,825
70 0,489 0,645 0,705 0,851
80 0,502 0,662 0,724 0,874
90 0,514 0,678 0,742 0,895
100 0,525 0,693 0,757 0,914
110 0,535 0,706 0,772 0,932
120 0,544 0,718 0,786 0,948
130 0,553 0,730 0,798 0,963
140 0,562 0,741 0,810 0,978
150 0,560 0,751 0,821 0,991
160 0,577 0,761 0,832 1,004
170 0,584 0,770 0,642 1,016
180 0,590 0,779 0,852 1,028
190 0,597 0,788 0,861 1,039
200 0,603 0,796 0,870 1,050
210 0,609 0,804 0,879 1,060
220 0,615 0,811 0,887 1,070
230 0,620 0,818 0,895 1,080
240 0,625 0,825 0,902 1,089
8 © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Table 5 (continued)
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
250 0,631 0,832 0,910 1,098
260 0,636 0,839 0,917 1,107
270 0,640 0,845 0,924 1,115
280 0,645 0,851 0,931 1,123
290 0,650 0,857 0,937 1,131
300 0,654 0,863 0,943 1,139
310 0,658 0,869 0,950 1,146
320 0,662 0,874 0,956 1,153
330 0,667 0,880 0,962 1,161
340 0,671 0,885 0,967 1,168
350 0,674 0,890 0,973 1,174
360 0,678 0,895 0,979 1,181
370 0,682 0,900 0,984 1,187
380 0,686 0, 905 0,989 1,194
390 0,689 0,909 0,994 1,200
400 0,693 0,914 0,999 1,206
410 0,696 0,919 1,004 1,212
420 0,699 0,923 1,009 1,218
430 0,703 0,927 1,014 1,224
440 0,706 0,932 1,019 1,229
450 0,709 0,936 l,023 1,235
460 0,712 0,940 1,028 1,240
470 0,715 0,944 1,032 1,246
480 0,718 0,948 1,036 1,251
490 0,721 0,952 1,041 1,256
500 0,724 0,956 1,045 1,261
550 0,738 0,974 1,065 1,285
600 0,751 0,991 1,084 1,308
650 0,763 1,007 1,101 1,329
700 0,775 1,022 1,118 1,349
750 0,786 1,036 1,133 1,368
800 0,796 1,050 1,148 1,385
850 0,805 1,063 1,162 1,402
900 0,815 1,075 1,175 1,418
950 0,824 1,087 1,188 1,434
1 000 0,832 1,098 1,200 1,449
1 050 0,840 1,109 1,212 1,463
1 100 0,848 1,119 1,223 1,477
1 150 0,856 1,129 1,234 1,490
1 200 0,863 1,139 1,245 1,502
1 250 0,870 1,148 1,255 1,515
1 300 0,877 1,157 1,265 1,527
© ISO 2021 – All rights reserved 9
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)
Table 5 (continued)
Cross sectional
Factor for non-proportional gauge length of:
area of test piece:
mm 200 mm 100 mm 80 mm 50 mm
1 350 0,883 1,166 1,275 1,538
1 400 0,890 1,174 1,284 1,549
1 450 0,896 1,183 1,293 1,560
1 500 0,902 1,191 1,302 1,571
1 550 0,908 1,198 1,310 1,581
1 600 0,914 1,206 1,319 1,591
1 650 0,920 1,214 1,327 1,601
1 700 0,925 1,221 1,335 1,611
1 750 0,931 1,228 1,343 1,620
1 800 0,936 1,235 1,350 1,629
1 850 0,941 1,242 1,358 1,638
1 900 0,946 1,248 1,365 1,647
1 950 0,951 1,255 1,372 1,656
2 000 0,956 1,261 1,379 1,664
2 050 0,960 1,267 1,386 1,672
2 100 0,965 1,273 1,392 1,680
2 150 0,970 1,279 1,399 1,688
2 200 0,974 1,285 1,405 1,696
2 250 0,979 1,291 1,412 1,704
2 300 0,983 1,297 1,418 1,711
2 350 0,987 1,302 1,424 1,719
2 400 0,991 1,308 1,430 1,726
2 450 0,995 1,313 1,436 1,733
2 500 0,999 1,319 1,442 1,740
2 550 1,003 1,324 1,448 1,747
2 600 1,007 1,329 1,453 1,754
2 650 1,011 1,334 1,459 1,760
2 700 1,015 1,339 1,464 1,767
2 750 1,019 1,344 1,470 1,773
2 800 1,022 1,349 1,475 1,780
2 850 1,026 1,354 1,480 1,786
2 900 1,029 1,358 1,485 1,792
2 950 1,033 1,363 1,490 1,799
3 000 1,036 1,368 1,495 1,805
9.4 Elongation values

Tables 6 to 9 can be used for conversion to 56, 5 S , whilst Tables 14 to 17 can be used to obtain

elongation on fixed gauge lengths corresponding to 56, 5 S . Similarly, Tables 10 to 13 can be used for

conversion to 4 S and Tables 18 to 21 for elongations on fixed gauge lengths corresponding to 4 S

0 0
10 © ISO 2021 – All rights reserved
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oSIST prEN ISO 2566-1:2021
ISO/FDIS 2566-1:2021(E)

Table 6 — Elongation values on 56, 5 S corresponding to those obtained on 50 mm gauge

length
Actual elon-

Corresponding elongation (%) on 56, 5 S gauge length if cross-sectional area in square millimetres is:

gation (%) on
50 mm gauge
length

5 10 20 40 60 80 100 150 200 250 300 400 500 600 700 800 900 1 000 1 200 1 500 2 000 2 500

18 31 27 24 21 19 18 17 16 15 14 14 13 12 12 12 11 11 11 10 10 9 9
19 33 29 25 22 20 19 18 17 16 15 15 14 13 13 12 12 12 11 11 11 10 10
20 35 30 26 23 21 20 19 18 17 16 15 14 14 13 13 13 12 12 12 11 10 10
21 36 32 28 24 22 21 20 18 17 17 16 15 14 14 14 13 13 13 12 12 11 11
22 38 33 29 25 23 22 21 19 18 17 17 16 15 15 14 14 13 13 13 12 12 11
23 40 35 30 26 24 23 22 20 19 18 18 17 16 15 15 14 14 14 13 13 12 12
24 42 36 32 27 25 24 23 21 20 19 18 17 17 16 15 15 15 14 14 13 13 12
25 43 38 33 29 26 25 24 22 21 20 19 18 17 17 16 16 15 15 14 14 13 13
26 45 39 34 30 27 26 25 23 22 21 20 19 18 17 17 16 16 16 15 14 14 13
27 47 41 35 31 28 27 26 24 22 21 21 19 19 18 17 17 17 16 16 15 14 14
28 49 42 37 32 30 28 27 25 23 22 21 20 19 19 18 18 17 17 16 16 15 14
29 50 44 38 33 31 29 28 25 24 23 22 21 20 19 19 18 18 17 17 16 15 15
30 52 45 39 34 32 30 29 26 25 24 23 22 21 20 19 19 18 18 17 17 16 15
31 54 47 41 35 33 31 30 27 26 25 24 22 21 21 20 19 19 19 18 17 16 16
32 55 48 42 37 34 32 30 28 27 25 24 23 22 21 21 20 20 19 19 18 17 16
33 57 50 43 38 35 33 31 29 27 26 25 24 23 22 21 21 20 20 19 18 17 17
34 59 51 45 39 36 34 32 30 28 27 26 25 23 23 22 21 21 20 20 19 18 17
35 61 53 46 40 37 35 33 31 29 28 27 25 24 23 23 22 21 21 20 19 18 18
...