EN ISO 377:1997

SLOVENSKI STANDARD
01-avgust-1998
Jeklo in jekleni izdelki - Mesto jemanja in priprava vzorcev ter preskušanci za
mehansko preskušanje (ISO 377:1997)
Steel and steel products - Location and preparation of samples and test pieces for
mechanical testing (ISO 377:1997)
Stahl und Stahlerzeugnisse - Lage und Vorbereitung von Probenabschnitten und Proben
für mechanische Prüfungen (ISO 377:1997)
Acier et produits en acier - Position et préparation des échantillons et éprouvettes pour
essais mécaniques (ISO 377:1997)
Ta slovenski standard je istoveten z: EN ISO 377:1997
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.140.01 Železni in jekleni izdelki na Iron and steel products in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
IS0
STANDARD
Second edition
1997-07-I 5
Steel and steel products - Location
and preparation of samples and test
pieces for mechanical testing
Acier et produits en acier -
Position et pkparation des khantiiions
et bprouvettes pour essais mkaniques
Reference number
IS0 377: 1997(E)
IS0 377:1997(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 377 was prepared by Technical Committee
ISO/TC 17, Steel, Subcommittee SC 20, Genera/ technical delivery
conditions, sampling and mechanical testing methods.
This second edition of IS0 377 cancels and replaces IS0 377~1:1989,
which has been technically revised.
Annex A forms an integral part of this International Standard.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
INTERNATIONAL STANDARD @ IS0 IS0 377: 1997(E)
Steel and steel products - Location and preparation of samples
and test pieces for mechanical testing
II Scope
This International Standard specifies requirements for the identification, location and preparation of samples and
test pieces intended for mechanical tests on steel sections, bars, rod, flat products and tubular products as defined
in IS0 6929. If agreed in the order this standard may also apply to other metallic products. It does not apply to non-
destructive tests.
These samples and test pieces are for use in tests which are carried out in conformity with the methods specified in
the product or material standard or, in the absence of this, in the test standard.
Where the requirements of the order or product standard differ from those given in this International Standard, then
the requirements of the order or product standard apply.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
- Designation of test piece axes.
IS0 3785:-l), Metallic materials
Definitions and classification.
IS0 6929: 1987, Steel products -
3 Definitions
For the purposes of this International Standard, the definitions given in IS0 6929 and the following apply.
3.1 test unit: Number of pieces or the tonnage of products to be accepted or rejected together, on the basis of the
tests to be carried out on sample products in accordance with the requirements of the product standard or order.
(See figure 1.)
3.2 sample product: Item (e.g. bar, sheet, coil) selected for inspection and/or testing. (See figure 1.)
1) To be published. (Revision of IS0 3785:1976)

@ IS0
IS0 377:1997( E)
\
\
\
\
\
(3.1)
Rough specimen (3.4)
- Examples of terms defined in clause 3
Figure 1
IS0 377:1997(E)
@ IS0
3.3 sample: Sufficient quantity of material taken from the sample product for the purpose of producing one or
more test pieces. (See figure 1.)
NOTE - In certain cases, the sample may be the sample product.
3.4 rough specimen: Part of a sample having undergone mechanical treatment, for the purpose of producing a
test piece. (See figure 1.)
3.5 test piece: Part of a sample or rough specimen, with specified dimensions, machined or unmachined, brought
to a required condition for submission to a given test. (See figure 1.)
NOTE - In certain cases, the test piece may be the sample or the tough specimen.
3.6 reference condition: Condition of a sample, rough specimen or test piece having undergone a heat treatment
to represent the intended final condition of the product.
NOTE - In such cases the sample, rough specimen or test piece is called the reference sample, reference rough specimen
or reference test piece.
4 General requirements
4.1 Representative testing
Sample, rough specimens and test pieces selected in accordance with annex A, shall be considered to be
representative of the product.
ting, casting hot and/or cold forming, heat treatment
NOTE - As a result of their production sequence i.e. mel etc., steel
homogeneous, I The mechanical properties of samples taken from other locations may be different.
products are not
Identification of sample products, samples, rough specimens and test pieces
4.2
Sample products, samples, rough specimens and test pieces shall be marked to ensure traceability to the original
product and their location and orientation in that product. For this purpose, if, during th.e preparation of the sample,
rough specimen and/or test pieces, removal of the marks cannot be avoided, transfer of these marks shall be
carried out before the existing marks are removed or in the case of automatic preparation equipment before the test
piece is removed from the equipment. In the case of specific inspection and testing and where requested by the
purchaser the transfer of the marks shall be carried out in the presence of the purchaser ’s representative.
In the case of fully automatic in line preparation and testing systems, marking of samples, rough specimens and test
pieces is not necessary if an adequate control system exists, which clearly defines the procedures to be followed in
the event of system failure.
5 Preparation of samples and selection of test pieces
5.1 Selection and dimensions of samples and location of test pieces
The sample shall be selected so that the test piece can be located as indicated in annex A. The sample shall have
sufficient dimensions to allow sufficient test pieces required for carrying out specified tests, and for any retests
which may be necessary.
5.2 Direction of axis of test pieces
The direction of the test piece axis relative to the principle direction of working shall be as specified in the
appropriate product standard or order. The designation of the test piece axis shall be in accordance with IS0 3785.
IS0 377: 1997(E)
5.3 Condition and separation of samples
5.3.1 General
The material or product standard shall specify whether the test is intended to determine the properties,
a) in the as-delivered condition (see 53.2) or
b) in the reference condition (see 5.3.3).
5.3.2 Testing in the as-delivered condition
A sample intended for testing in the as-delivered condition shall be separated from the product either
a) after the forming and heat treatment processes have been completed or
b) before the heat treatment process, in which case the heat treatment of the separated sample shall be carried
out under the same conditions as that of the product.
Separation of the sample shall be carried out in such a manner so as not to change the characteristics of that part of
the sample used to provide the test pieces.
Where flattening or straightening of the sample is unavoidable in the preparation of the test piece, it shall be carried
out cold unless otherwise specified in the product standard.
5.3.3 Testing in the reference condition
5.3.3.1 Sample
A sample intended for testing in the reference condition shall be separated from the product at the stage of
manufacture specified in the product standard or order.
Separation of the sample shall be carried out in such a manner so as not to change the characteristics of that part of
the sample used to provide the test pieces after heat treatment.
flattening or strag ,htening is net essary it may be carried out either hot or cold before any heat treatment.
NOTE - When
the final heat treatment temperatu re.
When carried out hot it should be at a temperature below
5.3.3.2 Rough specimen
A rough specimen intended for testing in the reference condition shall be prepared as follows.
a) Mechanical treatment prior to heat treatment: when the sample is to be made smaller for the process of heat
treatment, the product standard shall specify the dimensions to which the rough specimen shall be reduced and
the reduction process e.g. forging, rolling, machining.
b) Heat treatment: the heat treatment of the rough specimen shall take place in an environment where the
uniformity of the temperature is adequately assured and the temperature is measured by means of a calibrated
instrument. The heat treatment shall be in accordance with the requirements of the product standard or of the
order.
@ IS0 IS0 377:1997(E)
6 Preparation of test pieces
6.1 Cutting and machining
Cutting and machining of samples and rough specimens for the preparation of test pieces shall be carried out taking
such precautions as necessary to avoid superficial work hardening and heating of the material likely to change the
mechanical characteristics. After machining, any marks left by the tool which might interfere with the results of the
test shall be removed, either by grinding (with ample coolant supply) or by polishing, provided that the chosen
method of finishing maintains the dimensions and shape of the test piece within the tolerances specified in the
standard for appropriate test.
The tolerances on the dimensions of the test pieces shall be those specified in the appropriate test methods.
6.2 Reference heat treatment
When the required reference heat treatment is to be carried out on the test piece the provisions for heat treatment
shall be the same as for the rough specimen [see 5.3.3.2 b)ja

@ IS0
IS0 377: 1997(E)
Annex A
(normative)
Location of samples and test pieces
A.1 General
This annex applies to the location of test pieces for the following product forms
- sections;
- bars and rod;
- flat products;
- tubular products.
The location of test pieces for tensile and impact tests are indicated in figures A.1 to A.15 For bend tests the width
position is as for the tensile test pieces.
Where more than one test piece is required they may be placed adjacent to each other in the location specified.
A.2 Sections
A.2.1 Location of test pieces across the width of section
The location of test pieces shall be in accordance with figure A.1.
NOTES
1 For sections with tapered flanges; if agreed at the time of enquiry and ordering the sample may be taken from the web [see
figure A.1 b) and d)] or the sample from the tapered flange may be machined.
2 For unequal leg angles, samples may be taken from either leg.
A.2.2 Location of test pieces in thickness of section
A.2.2.1 Tensile test pieces
The location of tensile test pieces shall be in accordance with figure A.2. Full thickness test pieces [see figure
A.2 a)] shall be used whenever machining and test equipment allows.
A.2.2.2 Impact test pieces
The location of impact test pieces shall be in accordance with figure A.3.
A.3 Round bars and rod
A.3.1 Tensile test pieces
The location of tensile test pieces shall be selected in accordance with figure A.4. Full section test pieces [see
figure A.4 a)] shall be used whenever machining and test equipment allows.

@ IS0 IS0 377:1997(E)
A.3.2 Impact test pieces
The location of impact test pieces shall be selected in accordance with figure A.5.
A.4 Hexagonal bar
A.4.1 Tensile test pieces
The location of tensile test pieces shall be selected in accordance with figure A.6.
Full section test pieces [see figure A.6 a)] shall be used wherever machining and test equipment allows.
8.4.2 Impact test pieces
The location of impact test pieces shall be selected in accordance with figure A.7.
A.5 Rectangular bar
A.51 Tensile test pieces
The location of tensile test pieces shall be in accordance with figure A.8.
Full section or rectangular test pieces [see figures A.8 a), b) or c)] shall be used whenev
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