SIST EN ISO 3738-2:2007
(Main)Hardmetals - Rockwell hardness test (scale A) - Part 2: Preparation and calibration of standard test blocks (ISO 3738-2:1988)
Hardmetals - Rockwell hardness test (scale A) - Part 2: Preparation and calibration of standard test blocks (ISO 3738-2:1988)
This part of ISO 3738 specifies the preparation and calibration of hardmetal primary Standard test blocks, secondary Standard test blocks and working Standard test blocks from master standard test blocks to be used for the verification of Rockwell hardness testing machines (scale A) and indenters for testing hardmetals. This document should be read in conjunction with ISO 3738-1.
Hartmetalle - Rockwell-Härteprüfung (Skala A) - Teil 2: Vorbereitung und Kalibrierung von Standard-Prüfblöcken (ISO 3738-2:1988)
Der vorliegende Teil der ISO 3738 enthält Festlegungen für die Vorbereitung und Kalibrierung von Primär-, Sekundär- und Arbeits-Standard-Prüfblöcken aus Hartmetall, entnommen aus Normal-Standard-Prüfblöcken, die für die Prüfung von Rockwell-Härteprüfgeräten (Skala A) und Eindringkörpern für die Prüfung von Hartmetallen verwendet werden.
Dieses Dokument sollte im Zusammenhang mit ISO 3738-1 gesehen werden.
Métaux durs - Essai de dureté Rockwell (échelle A) - Partie 2: Préparation et étalonnage des blocs de référence (ISO 3738-2:1988)
Trdine - Preskus trdote po Rockwellu (skala A) - 2. del: Priprava in umerjanje standardnih preskusnih blokov (ISO 3738-2:1988)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 3738-2:2007
01-januar-2007
Trdine - Preskus trdote po Rockwellu (skala A) - 2. del: Priprava in umerjanje
standardnih preskusnih blokov (ISO 3738-2:1988)
Hardmetals - Rockwell hardness test (scale A) - Part 2: Preparation and calibration of
standard test blocks (ISO 3738-2:1988)
Hartmetalle - Rockwell-Härteprüfung (Skala A) - Teil 2: Vorbereitung und Kalibrierung
von Standard-Prüfblöcken (ISO 3738-2:1988)
Métaux durs - Essai de dureté Rockwell (échelle A) - Partie 2: Préparation et étalonnage
des blocs de référence (ISO 3738-2:1988)
Ta slovenski standard je istoveten z: EN ISO 3738-2:2006
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.160 Metalurgija prahov Powder metallurgy
SIST EN ISO 3738-2:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 3738-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
ICS 77.160; 77.040.10
English Version
Hardmetals - Rockwell hardness test (scale A) - Part 2:
Preparation and calibration of standard test blocks (ISO 3738-
2:1988)
Métaux durs - Essai de dureté Rockwell (échelle A) - Partie Hartmetalle - Rockwell-Härteprüfung (Skala A) - Teil 2:
2: Préparation et étalonnage des blocs de référence (ISO Vorbereitung und Kalibrierung von Standard-Prüfblöcken
3738-2:1988) (ISO 3738-2:1988)
This European Standard was approved by CEN on 9 March 2006.
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, Romania,
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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3738-2:2006: E
worldwide for CEN national Members.
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EN ISO 3738-2:2006 (E)
Foreword
The text of ISO 3738-2:1988 has been prepared by Technical Committee ISO/TC 119 "Powder
metallurgy” of the International Organization for Standardization (ISO) and has been taken over
as EN ISO 3738-2:2006 by Technical Committee CEN/SS M11 "Powder metallurgy", the
secretariat of which is held by CMC.
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 October 2006, and conflicting national
standards shall be withdrawn at the latest by October 2006.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 3738-2:1988 has been approved by CEN as EN ISO 3738-2:2006 without any
modifications.
2
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ISO
INTERNATIONAL STANDARD
~ 3738-2
’ First edition
~ 1988-12-15
INTERNATIONAL ORGANIZATDON FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXAYHAPO,QHAR OPTAHM3A~MR l-l0 CTAHflAPTM3A~MM
Hardmetals - Rockwell hardness test (scale A) -
Part 2 :
Preparation and calibration of Standard test blocks
Mtaux durs - Essai de duretk Rockwell fechelle Al -
Partie 2: Prbpara tion et 6 talonnage des blocs de rhference
Reference number
ISO 3738-2: 1988 (E)
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ISO 3738-2 : 1988 (El
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. Esch 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, govern-
mental 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 3738-2 was prepared by Technical Committee ISO/TC 119,
Powder me tallurg y.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organkation for Standardkation, 1988
Printed in Switzerland
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ISO 3738-2 : 1988 (E)
INTERNATIONAL STANDARD
Hardmetals - Rockwell hardness test (scale A) -
Part 2 :
Preparation and calibration of Standard test blocks
than a total of 1 % (mlm) of other carbides 1e.g. of titanium,
1 Scope and field of application
tantalum, niobium). The composition and structure shall be
Chosen to give the desired hardness. Free carbon and eta-
This part of ISO 3738 specifies the preparation and calibration
Phase shall be absent.
of hardmetal primary Standard test blocks, secondary Standard
test blocks and working Standard test blocks from master stan-
dard test blocks to be used for the verification of Rockwell
4.2 Standard test blocks shall have a nominal diameter of
hardness testing machines (scale A) and indenters for testing
45 mm and a nominal thickness of 8 mm. The bottom face shall
hardmetals.
be chamfered 0,8 mm by 45O.
This document should be read in conjunction with ISO 3738-1.
4.3 Every Standard test block shall be ground on both flat
faces. The face on which indentations are to be made shall
have a surface finish of R, < 0,2 Pm, and may be polished.
2 Reference
The maximum deviation in flatness of the surfaces shall not
Rockwell hardness test fscale Al -
ISO 3738-1, liardmetals -
exceed 0,010 mm. The bottom of the blocks shall not be
Part 7 : Pest method.
convex.
The maximum deviation in parallellism shall not exceed
0,020 mm per 50 mm.
3 Symbols and designations
Table 1
5 Master standard test blocks
Designation
5.1 Two sets of five master Standard test blocks each shall be
Standard deviation of hardness determinations on
the first sur-face of a primary Standard test block retained by the Cemented Carbide Producers Association
ICCPA), USA, and one set shall be retained by the Secretariat
Standard deviation of hardness determinations on
of ISO/TC 119.
the test surface of a primary Standard test block
Mean Standard deviation of hardness determi-
One of the sets retained in the USA shall be used for calibrating
nations on a primary Standard test block.
primary Standard test blocks.
Standard deviations shall be calculated using the equation
5.2 The markings and internationally agreed hardnesses and
Standard deviations of three sets sf the five master test blocks
are given in tables 2a), 2b) and 2~).
Table 2a) - Set one retained by CXPA
Marking Hardness
Standard deviation
4 Preparation of Standard test blocks
0,07
2 series I 85,70
6 series El =,m 0,07
8 series Ill 91,08 0,06
4.1 All Standard test blocks referred to in this part of
91,59 0,04
2 series IV
ISO 3738 shall comprise hardmetals composed substantially of
8 series V 92,80 0,05
tungsten carbide and Cobalt without other carbides or with less
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ISO 3738-2 : 1988 (El
indentations shall then be made in such a way as to cover the
Table 2b) - Set two retained by CCPA
whole test surface of the primary Standard test block and the
Marking Hardness Standard deviation Standard deviation (SJ of the results shall be calculated.
0,08
4 series I
0,08
10 series II 6.6 After establishing uniformity, a further 0,35 mm shall be
0,06
6 series Ill
removed from
...
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