SIST EN ISO 6506-2:2006

Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing machines (ISO 6506-2:2005)

This part of ISO 6506 specifies a method of verification and  calibration of testing machines used for determining Brinell  hardness in accordance with ISO 6506-1. It specifies a direct  method for checking the main functions of machine operation  and an indirect method suitable for the overall checking of the  machine . The indirect method may be used independently for  periodic routine checking of machine operation while in service.  If a testing machine is also to be used for other methods of  hardness testing, it shall be verified independently for each  method. This part of ISO 6506 is also applicable to portable  hardness testing machines.

Metallische Werkstoffe - Härteprüfung nach Brinell - Teil 2: Prüfung und Kalibrierung der Prüfmaschinen (ISO 6506-2:2005)

In diesem Teil von ISO 6506 ist das Verfahren für die Prüfung und Kalibrierung von Härteprüfmaschinen zur Bestimmung der Brinellhärte nach ISO 6506-1 festgelegt.
Es sind ein direktes Verfahren zur Prüfung der Hauptfunktionen der Härteprüfmaschine und ein indirektes Prüfverfahren zur Ermittlung der Funktionsfähigkeit der Härteprüfmaschine festgelegt. Das indirekte Verfahren kann für die regelmäßige Routineüberprüfung der Maschine beim Anwender angewendet werden.
Wird eine Härteprüfmaschine auch für andere Härteprüfverfahren verwendet, muss sie unabhängig für jedes Verfahren geprüft werden.
Dieser Teil von ISO 6506 ist auch anwendbar auf tragbare Härteprüfgeräte.

Matériaux métalliques - Essai de dureté Brinell - Partie 2: Vérification et étallonage des machines d'essai (ISO 6506-2:2005)

L'ISO 6506-2:2005 spécifie une méthode de vérification et d'étalonnage des machines d'essai utilisées pour la détermination de la dureté Brinell conformément à l'ISO 6506-1.
L'ISO 6506-2:2005 spécifie une méthode de vérification directe des principales fonctions de la machine et une méthode de vérification indirecte appropriée pour une vérification globale de la machine. La méthode indirecte peut être utilisée indépendamment pour une vérification périodique de routine du fonctionnement de la machine en service. Si une machine d'essai est également utilisée pour d'autres méthodes d'essai de dureté, elle doit être vérifiée indépendamment pour chaque méthode.
L'ISO 6506-2:2005 est également applicable aux machines d'essai de dureté portables.

Kovinski materiali – Preskus trdote po Brinellu – 2. del: Preverjanje in umerjanje naprav za preskušanje (ISO 6506-2:2005)

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-2006
• Withdrawal Date: 14-Oct-2014
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 13-Oct-2014
• Due Date: 05-Nov-2014
• Completion Date: 15-Oct-2014
• Ref Project: EN ISO 6506-2:2005 - Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing machines (ISO 6506-2:2005)

Relations

• Replaced By: SIST EN ISO 6506-2:2014 - Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing machines (ISO 6506-2:2014)
• Effective Date: 01-Dec-2014
• Replaces: SIST EN ISO 6506-2:2001 - Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing machines (ISO 6506-2:1999)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 6506-2:2006
01-marec-2006
1DGRPHãþD
SIST EN ISO 6506-2:2001
Kovinski materiali – Preskus trdote po Brinellu – 2. del: Preverjanje in umerjanje
naprav za preskušanje (ISO 6506-2:2005)
Metallic materials - Brinell hardness test - Part 2: Verification and calibration of testing
machines (ISO 6506-2:2005)
Metallische Werkstoffe - Härteprüfung nach Brinell - Teil 2: Prüfung und Kalibrierung der
Prüfmaschinen (ISO 6506-2:2005)
Matériaux métalliques - Essai de dureté Brinell - Partie 2: Vérification et étallonage des
machines d'essai (ISO 6506-2:2005)
Ta slovenski standard je istoveten z: EN ISO 6506-2:2005
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
SIST EN ISO 6506-2:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 6506-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 77.040.10 Supersedes EN ISO 6506-2:1999
English Version
Metallic materials - Brinell hardness test - Part 2: Verification
and calibration of testing machines (ISO 6506-2:2005)
Matériaux métalliques - Essai de dureté Brinell - Partie 2: Metallische Werkstoffe - Härteprüfung nach Brinell - Teil 2:
Vérification et étallonage des machines d'essai (ISO 6506- Prüfung und Kalibrierung der Prüfmaschinen (ISO 6506-
2:2005) 2:2005)
This European Standard was approved by CEN on 14 December 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6506-2:2005: E
worldwide for CEN national Members.

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EN ISO 6506-2:2005 (E)





Foreword


This document (EN ISO 6506-2:2005) has been prepared by Technical Committee ISO/TC 164
"Mechanical testing of metals" in collaboration with Technical Committee ECISS/TC 1 "Steel -
Mechanical testing", the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by June 2006, and conflicting national
standards shall be withdrawn at the latest by June 2006.

This document supersedes EN ISO 6506-2:1999.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


Endorsement notice

The text of ISO 6506-2:2005 has been approved by CEN as EN ISO 6506-2:2005 without any
modifications.

2

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INTERNATIONAL ISO
STANDARD 6506-2
Second edition
2005-12-15


Metallic materials — Brinell hardness
test —
Part 2:
Verification and calibration of testing
machines
Matériaux métalliques — Essai de dureté Brinell —
Partie 2: Vérification et étalonnage des machines d'essai




Reference number
ISO 6506-2:2005(E)
©
ISO 2005

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ISO 6506-2:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 6506-2:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 General conditions .1
4 Direct verification.2
5 Indirect verification.4
6 Intervals between verifications .5
7 Verification report/calibration certificate .6
Annex A (informative) Uncertainty of measurement of the calibration results of the hardness
testing machine.7
Bibliography .13

© ISO 2005 – All rights reserved iii

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ISO 6506-2:2005(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 6506-2 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 3, Hardness testing.
This second edition cancels and replaces the first edition (ISO 6506-2:1999) 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 © ISO 2005 – All rights reserved

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ISO 6506-2:2005(E)
Introduction
Attention is drawn to the fact that in this part of ISO 6506, only the use of the hardmetal ball indenter is
specified.
The designation of the Brinell hardness is HBW and should not be confused with the former designation HB,
or HBS when a steel ball indenter was used.

© ISO 2005 – All rights reserved v

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INTERNATIONAL STANDARD ISO 6506-2:2005(E)

Metallic materials — Brinell hardness test —
Part 2:
Verification and calibration of testing machines
1 Scope
This part of ISO 6506 specifies a method of verification and calibration of testing machines used for
determining Brinell hardness in accordance with ISO 6506-1.
It specifies a direct method for checking the main functions of machine operation and an indirect method
suitable for the overall checking of the machine. The indirect method may be used independently for periodic
routine checking of machine operation while in service.
If a testing machine is also to be used for other methods of hardness testing, it should be verified
independently for each method.
This part of ISO 6506 is also applicable to portable hardness testing machines.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 376:2004, Metallic materials — Calibration of force-proving instruments used for the verification of
uniaxial testing machines
ISO 6506-1:2005, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6506-3, Metallic materials — Brinell hardness test — Part 3: Calibration of reference blocks
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
3 General conditions
Before a Brinell hardness testing machine is verified, the machine shall be checked to ensure that it is
properly set up in accordance with the manufacturer's instructions.
Especially, it should be checked that:
a) the plunger holding the ball slides correctly in its guide;
b) the ball-holder with a ball (from a lot verified in accordance with 4.3) is firmly mounted in the plunger;
c) the test force is applied and removed without shock, vibration or overrun and in such a manner that the
readings are not influenced;
© ISO 2005 – All rights reserved 1

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ISO 6506-2:2005(E)
d) if the measuring system is integrated into the machine:
⎯ the change from removing the test force to measuring mode does not influence the readings;
⎯ the illumination does not affect the readings; and
⎯ the centre of the indentation is in the centre of the field of view, if necessary.
4 Direct verification
4.1 General
4.1.1 Direct verification should be carried out at a temperature of (23 ± 5) °C. If the verification is made
outside this temperature range, this shall be reported in the verification report.
4.1.2 The instruments used for verification and calibration shall be traceable to national standards.
4.1.3 Direct verification involves:
a) the calibration of the test force;
b) the verification of the indenter ball;
c) the calibration of the measuring system;
d) the verification of the testing cycle.
4.2 Calibration of the test force
4.2.1 Each test force shall be measured within the working range of the testing machine. Whenever
applicable, this shall be done at no less than three positions of the plunger uniformly spaced throughout its
range of movement during testing.
4.2.2 Three measurements shall be made for each force at each position of the plunger. Immediately before
each measurement is taken, the plunger shall be moved in the same direction as during testing.
4.2.3 The force shall be measured by one of the following two methods:
⎯ by means of a force-proving instrument in accordance with ISO 376:2004 class 1, or
⎯ by balancing against a force, accurate to ± 0,2 %, applied by means of calibrated masses or another
method with the same accuracy.
4.2.4 Each measurement of a force shall be within ± 1,0 % of the nominal test force, as defined in
ISO 6506-1.
4.3 Verification of the indenter ball
4.3.1 The indenter consists of a ball and an indenter holder. The verification applies only to the ball.
4.3.2 For the purpose of verifying the size and the hardness of the balls, a sample selected at random from
a batch shall be tested. The balls verified for hardness shall be discarded.
4.3.3 The balls shall be polished and free from surface defects.
2 © ISO 2005 – All rights reserved

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ISO 6506-2:2005(E)
4.3.4 The user shall either measure the balls to ensure that they meet the following requirements or shall
obtain balls from a supplier certifying that the following conditions are met.
4.3.4.1 The diameter shall be determined by taking the mean value of not less than three single values of
diameter measured at different positions on the ball. No single value shall differ from the nominal diameter by
more than the tolerance given in Table 1.
Table 1 — Tolerances for different ball diameters
Ball diameter Tolerance
mm mm
10 ± 0,005
5
± 0,004
2,5
± 0,003
1
± 0,003

4.3.4.2 The characteristics of the hardmetal balls shall be as follows.
a) Hardness: The hardness shall be not less than 1 500 HV , when determined using a test force of at least
4,903 N, in accordance with ISO 6507-1. The hardmetal ball may be tested directly on this spherical
surface or by sectioning the ball and testing on the ball interior.
3
b) Density: ρ = (14,8 ± 0,2) g/cm .
The following chemical composition is recommended:
⎯ tungsten carbide (WC) balance;
⎯ total other carbides 2,0 %;
⎯ cobalt (Co) 5,0 % to 7,0 %.
4.4 Calibration of the measuring system
4.4.1 The scale of the measuring system shall be graduated to permit estimation of the diameter of the
indentation to within ± 0,5 %.
4.4.2 The measuring system shall be verified by measurements made on an object micrometer at a
minimum of five intervals over each working range. The maximum error of each interval shall not exceed
0,5 %.
4.4.3 When measuring a projected area, the maximum error shall not exceed 1 % of the area.
4.4.4 Hand held microscopes should be calibrated in accordance to the procedure of this standard and the
tolerances of the manufacturer.
4.5 Verification of the testing cycle
The testing cycle shall conform with the testing cycle specified in ISO 6506-1 and shall be timed with an
uncertainty less than ± 1,0 s.
© ISO 2005 – A
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