EN ISO 2739:2012

Sintered metal bushings - Determination of radial crushing strength (ISO 2739:2012)

ISO 2739:2012 specifies a method of measuring the radial crushing strength of sintered metal parts in the form of hollow cylinders, commonly known as bushings.
This method is applicable to sintered bushings composed of pure or alloyed metal powders.

Buchsen aus Sintermetall - Bestimmung der radialen Bruchfestigkeit (ISO 2739:2012)

Diese Internationale Norm legt ein Verfahren zur Messung der radialen Bruchfestigkeit von Sintermetallen in Form von hohlen Zylindern, allgemein als Lagerbuchsen bekannt, fest.
Dieses Verfahren gilt für Sinterbuchsen, die aus reinen oder legierten Metallpulvern bestehen.

Bagues en métal fritté - Détermination de la résistance à l'écrasement radial (ISO 2739:2012)

L'ISO 2739:2012 spécifie une méthode permettant de mesurer la résistance à l'écrasement radial des pièces en métal fritté se présentant sous forme de cylindres creux, communément appelés «bagues».
Cette méthode est applicable aux bagues frittées, élaborées à partir de métaux purs ou d'alliages

Puše iz sintranih kovin - Ugotavljanje radialne lomne trdnosti (ISO 2739:2012)

Ta mednarodni standard določa metodo za merjenje radialne lomne trdnosti sintranih kovinskih delov v obliki votlih valjev, splošno znanih kot puše. Ta metoda se uporablja za sintrane puše iz čistega kovinskega prahu ali kovinskega prahu iz zlitin.

General Information

• Status: Published
• Publication Date: 17-Jul-2012
• Withdrawal Date: 30-Jan-2013
• ICS: 77.040.10 - Mechanical testing of metals
• ICS: 77.160 - Powder metallurgy
• Technical Committee: CEN/SS M11 - Powder metallurgy
• Drafting Committee: CEN/SS M11 - Powder metallurgy
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 18-Jul-2012
• Completion Date: 18-Jul-2012
• Ref Project: SIST EN ISO 2739:2012 - Sintered metal bushings - Determination of radial crushing strength (ISO 2739:2012)

Relations

• Replaces: EN ISO 2739:2010 - Sintered metal bushes - Determination of radial crushing strength (ISO 2739:2006)
• Effective Date: 06-Sep-2010

Overview

EN ISO 2739:2012 is an internationally recognized standard developed by ISO/TC 119 "Powder metallurgy" that specifies a precise method for determining the radial crushing strength of sintered metal bushings. This standard applies to sintered metal parts shaped as hollow cylinders-commonly known as bushings-made from pure or alloyed metal powders. Updated to replace the 2010 edition, this version provides clear guidance on testing procedures, equipment requirements, and calculations for evaluating mechanical robustness under radial load.

Key Topics

• Scope and Applicability:
  The standard is applicable to sintered bushings without flanges, notches, drilled holes, or keyways, whether oil-impregnated or not. It defines how to properly prepare and measure test specimens made from metal powders.

• Testing Principle:
  Radial crushing strength is determined by applying a steadily increasing radial load to a hollow cylinder until fracture occurs or a maximum deformation of 10% of the diameter is reached.

• Apparatus Requirements:

  • A pressing apparatus to apply radial load.
  • A load measuring device accurate to 0.1% of full scale.
  • Two flat, ground hardened steel loading plates, ensuring parallelism and sufficient size for the specimen.

• Measurement and Calculation:
  Measurements of external diameter, internal diameter, length, and wall thickness are made under specified tolerances before testing. The radial crushing strength is calculated using the formula:

  [ K = \frac{F}{2Le}(D - e) ]

  where:

  • (K) = radial crushing strength (N/mm²)
  • (F) = maximum applied load at fracture (N)
  • (L) = length of the cylinder (mm)
  • (D) = external diameter (mm)
  • (e) = cylinder wall thickness (mm)

  This formula is valid when the wall thickness to diameter ratio (e/D) is less than 1/3.

• Precision and Repeatability:
  The standard includes precision data to ensure reliable and reproducible results across different laboratories, citing repeatability and reproducibility values for specific materials.

• Test Reporting:
  Detailed reporting requirements include the test reference, specimen identification, manufacturing details, oil impregnation status, machining, exact test results, and any factors potentially affecting accuracy.

Applications

• Quality Control in Powder Metallurgy:
  EN ISO 2739:2012 is essential for manufacturers of sintered metal bushings to verify the mechanical integrity of their products, ensuring they meet strength requirements for industrial applications.

• Engineering Design Validation:
  Engineers use radial crushing strength data to select appropriate sintered metal bushings for applications requiring resistance to radial compressive loads, such as in automotive, machinery, and aerospace components.

• Material Development:
  Researchers and developers of new alloyed metal powders apply this standard to assess how modifications in metal composition or sintering parameters affect mechanical performance.

• Comparative Testing:
  Enables standardized comparison of sintered metal materials between suppliers or production batches, supporting consistent product quality and regulatory compliance.

Related Standards

• ISO/TC 119 Series:
  Covers a range of standards related to powder metallurgy testing methods and sampling procedures.

• MPIF Standard 55:
  Provides additional guidance on radial crush strength testing, which this ISO standard references and incorporates for precision data.

• ISO 4498:
  Specification for sintered bronze and iron bushings, often used in conjunction with mechanical testing standards to ensure overall product quality.

• ISO 6538:
  Test methods for measuring hardness and mechanical properties of sintered metal powder components.

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Keywords: EN ISO 2739:2012, sintered metal bushings, radial crushing strength, powder metallurgy testing, mechanical testing of metals, sintered powder metal parts, radial load testing, bushing durability, metal powder components, standardized testing methods

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2012
1DGRPHãþD
SIST EN ISO 2739:2010
Puše iz sintranih kovin - Ugotavljanje radialne lomne trdnosti (ISO 2739:2012)
Sintered metal bushings - Determination of radial crushing strength (ISO 2739:2012)
Buchsen aus Sintermetall - Bestimmung der radialen Bruchfestigkeit (ISO 2739:2012)
Bagues en métal fritté - Détermination de la résistance à l'écrasement radial (ISO
2739:2012)
Ta slovenski standard je istoveten z: EN ISO 2739:2012
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.

EUROPEAN STANDARD
EN ISO 2739
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2012
ICS 77.160; 77.040.10 Supersedes EN ISO 2739:2010
English Version
Sintered metal bushings - Determination of radial crushing
strength (ISO 2739:2012)
Bagues en métal fritté - Détermination de la résistance à Buchsen aus Sintermetall - Bestimmung der radialen
l'écrasement radial (ISO 2739:2012) Bruchfestigkeit (ISO 2739:2012)
This European Standard was approved by CEN on 16 June 2012.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2739:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 2739:2012) has been prepared by Technical Committee ISO/TC 119 "Powder
metallurgy".
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 January 2013, and conflicting national standards shall be withdrawn at
the latest by January 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 2739:2010.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, the United Kingdom and Turkey.
Endorsement notice
The text of ISO 2739:2012 has been approved by CEN as a EN ISO 2739:2012 without any modification.

INTERNATIONAL ISO
STANDARD 2739
Third edition
2012-06-01
Sintered metal bushings — Determination
of radial crushing strength
Bagues en métal fritté — Détermination de la résistance à
l’écrasement radial
Reference number
ISO 2739:2012(E)
©
ISO 2012
ISO 2739:2012(E)
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 either ISO at the address below or ISO’s
member body in the country of the requester.
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ii © ISO 2012 – All rights reserved

ISO 2739:2012(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
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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 ar
...