prEN ISO 6506-1
(Main)Metallic materials - Brinell hardness test - Part 1: Test method (ISO/DIS 6506-1:2023)
Metallic materials - Brinell hardness test - Part 1: Test method (ISO/DIS 6506-1:2023)
ISO 6506-1:2014 specifies the method for the Brinell hardness test for metallic materials. It is applicable to both fixed location and portable hardness testing machines.
For some specific materials and/or products, particular International Standards exist (e.g. ISO 4498) and make reference to this International Standard.
Metallische Werkstoffe - Härteprüfung nach Brinell - Teil 1: Prüfverfahren (ISO/DIS 6506-1:2023)
In diesem Teil von ISO 6506 ist das Verfahren für die Prüfung der Brinellhärte von metallischen Werkstoffen festgelegt. Er ist anwendbar für ortsgebundene und ortsveränderliche Härteprüfmaschinen.
Für einige besondere Werkstoffe und/oder Erzeugnisse gibt es spezielle Internationale Normen (z. B. ISO 4498-1), die sich auf diese Norm beziehen.
Matériaux métalliques - Essai de dureté Brinell - Partie 1: Méthode d'essai (ISO/DIS 6506-1:2023)
L'ISO 6506-1:2014 spécifie la méthode d'essai de dureté Brinell pour les matériaux métalliques. Elle s'applique à la fois aux machines d'essai de dureté fixes et portables.
Pour des matériaux et/ou produits spécifiques, des Normes internationales spécifiques existent (par exemple l'ISO 4498) et font référence à la présente Norme internationale.
Kovinski materiali - Preskus trdote po Brinellu - 1. del: Preskusna metoda (ISO/DIS 6506-1:2023)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Kovinski materiali - Preskus trdote po Brinellu - 1. del: Preskusna metoda (ISO/DIS
6506-1:2023)
Metallic materials - Brinell hardness test - Part 1: Test method (ISO/DIS 6506-1:2023)
Metallische Werkstoffe - Härteprüfung nach Brinell - Teil 1: Prüfverfahren (ISO/DIS 6506-
1:2023)
Matériaux métalliques - Essai de dureté Brinell - Partie 1: Méthode d'essai (ISO/DIS
6506-1:2023)
Ta slovenski standard je istoveten z: prEN ISO 6506-1
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.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6506-1
ISO/TC 164/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-10-23 2024-01-15
Metallic materials — Brinell hardness test —
Part 1:
Test method
Matériaux métalliques — Essai de dureté Brinell —
Partie 1: Méthode d'essai
ICS: 77.040.10
This document is circulated as received from the committee secretariat.
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ISO/DIS 6506-1:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6506-1
ISO/TC 164/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
Metallic materials — Brinell hardness test —
Part 1:
Test method
Matériaux métalliques — Essai de dureté Brinell —
Partie 1: Méthode d'essai
ICS: 77.040.10
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 6506-1:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Symbols and abbreviated terms.1
5 Apparatus . 3
6 Test piece . 3
7 Procedure .4
8 Uncertainty of the results . 6
9 Test report . 7
Annex A (normative) Procedure for periodic checking of the testing machine by the user .8
Annex B (normative) Minimum thickness of the test piece in relation to the mean diameter
of indentation . 9
Annex C (informative) Uncertainty of the measured hardness values .11
Bibliography .15
iii
ISO/DIS 6506-1:2023(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO's adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 3, Hardness testing.
This Fourth edition cancels and replaces the third edition (ISO 6506-1:2014), which has been technically
revised.
ISO 6506 consists of the following parts, under the general title Metallic materials — Brinell hardness
test:
— Part 1: Test method
— Part 2: Verification and calibration of testing machines
— Part 3: Calibration of reference blocks
— Part 4: Table of hardness values
iv
DRAFT INTERNATIONAL STANDARD ISO/DIS 6506-1:2023(E)
Metallic materials — Brinell hardness test —
Part 1:
Test method
1 Scope
This part of ISO 6506 specifies the method for the Brinell hardness test for metallic materials. It is
applicable to both fixed location and portable hardness testing machines.
For some specific materials and/or products, particular International Standards exist (e.g. ISO 4498)
and make reference to this International Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 4498, Sintered metal materials, excluding hardmetals — Determination of apparent hardness and
microhardness
ISO 6506-2:2023, Metallic materials — Brinell hardness test — Part 2: Verification and calibration of
testing machines
ISO 6506-3:2023, Metallic materials — Brinell hardness test — Part 3: Calibration of reference blocks
ISO 6506-4, Metallic materials — Brinell hardness test — Part 4: Table of hardness values
3 Principle
An indenter (tungsten carbide composite ball with diameter, D) is forced into the surface of a test piece
and, after removal of the force, F, the mean diameter of the indentation, d, left in the surface is calculated
from a number of diameter measurements. .
The Brinell hardness is proportional to the quotient obtained by dividing the test force by the curved
surface area of the indentation. The indentation is assumed to take the shape of the unloaded ball
indenter, and its surface area is calculated from the mean indentation diameter and the ball diameter,
using the formula given in Table 1.
4 Symbols and abbreviated terms
4.1 See Figure 1 and Table 1.
ISO/DIS 6506-1:2023(E)
Table 1 — Symbols and abbreviated terms
Symbol/
Definition Unit
abbreviated term
D Diameter of the ball mm
F Test force N
d Mean diameter of the indentation mm
i
d =(d +d …d )/n
i 1 2 n
At least 2 indentation diameters measured at equal rotational spacing.
d , d Indentation diameters measured at approximately 90° mm
1 2
h Depth of indentation
mm
Dd
h=−11−
D
HBW Brinell hardness
Test force
=×constant (see Note)
idealized surface area of inndentation
2F
HBW0=×,102
d
π D 11−−
D
0,102 × F/D Force-diameter index
NOTE constant =≈ 0,102 , where 9,806 65 is the conversion factor from kgf to N.
9,806 65
4.2 The following is an example of the designation of Brinell hardness, HBW.
EXAMPLE
Amend to show correct spacing 600 HBW 1/30/20
NOTE In former editions of this International Standard, when use of a steel ball was permitted, the
Brinell hardness was denoted by HB or HBS.
ISO/DIS 6506-1:2023(E)
Figure 1 — Principle of test
For symbols, see Table 1.
5 Apparatus
5.1 The direct calibration of equipment shall be performed only when a requirement is realised, as
defined in table 4 of ISO 6506-2:XXXX — Direct verifications of hardness testing machines.
5.2 Testing machine, capable of applying a predetermined test force or test forces within the range
of 9,807 N to 29,42 kN, and calibrated and verified in accordance with the requirements of ISO 6506-2.
5.3 Indenter, a polished tungsten carbide composite ball, as specified in ISO 6506-2.
5.4 Indentation diameter measuring system, as specified in ISO 6506-2.
6 Test piece
6.1 The test shall be carried out on a surface which is smooth and even, free from oxide scale, foreign
matter and, in particular, completely free from lubricants, unless otherwise specified in product
ISO/DIS 6506-1:2023(E)
standards. The test piece shall have a surface finish that will allow a measurement of the diameter of
the indentation with a variability that is low enough for the intended purpose of the test result.
Surfaces to be indented with the smaller ball indenters, may be polished or lapped prior to making the
indentation to reduce the uncertainty of the diameter measurement.
6.2 Any test piece preparation performed prior to testing shall be carried out in such a way that any
alteration of the surface, for example, due to excessive heating or cold-working, is minimized.
6.3 The thickness of the test piece shall be at least eight times the depth of indentation, h, and a
thickness of at least ten times is recommended. Values for the minimum thickness of the test piece in
relation to the mean diameter of indentation are given in Annex B.
Visible deformation at the back of the test piece can indicate that the test piece is too thin.
7 Procedure
7.1 In general, the test should be carried out at ambient temperature within the limits of 10 °C to
35 °C. However, because temperature variation can affect the results, users of the Brinell test can
choose to control the temperature within a tighter range, such as 23 °C ± 5 °C.
7.2 Before performing any tests, confirm that verification has bee
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