ISO 4381:2011

Plain bearings - Tin casting alloys for multilayer plain bearings

ISO 4381:2011 specifies requirements for bearing metals based on tin casting alloys for multilayer plain bearings. The chemical composition and material properties refer to the original unprocessed material and are measured on representative samples. Testing results on final bearings can differ due to the influence of bearing production. Therefore, it is not intended that these results be compared with data given in ISO 4381:2011.

Paliers lisses — Alliages moulés à base d'étain pour paliers lisses multicouches

Drsni ležaji - Svinčeve in kositrove zlitine za večslojne drsne ležaje

Ta mednarodni standard določa zahteve za ležajne kovine, ki temeljijo na svinčevih in kositrovih zlitinah za večslojne drsne ležaje. Kemična sestava in lastnosti materiala se nanašajo na izvirne neobdelane materiale in se merijo na reprezentativnih vzorcih. Preskusni rezultati končnih ležajev se lahko razlikujejo zaradi vpliva proizvodnje ležajev. Zato ti rezultati niso namenjeni za primerjavo s podatki, ki so navedeni v tem standardu.

General Information

• Status: Published
• Publication Date: 26-Oct-2011
• ICS: 21.100.10 - Plain bearings
• ICS: 77.120.60 - Lead, zinc, tin and their alloys
• Technical Committee: ISO/TC 123/SC 2 - Materials and lubricants, their properties, characteristics, test methods and testing conditions
• Drafting Committee: ISO/TC 123/SC 2 - Materials and lubricants, their properties, characteristics, test methods and testing conditions
• Current Stage: 9060 - Close of review
• Completion Date: 04-Mar-2029
• Ref Project: SIST ISO 4381:2015 - Plain bearings - Tin casting alloys for multilayer plain bearings

Relations

• Revises: ISO 4381:2000 - Plain bearings - Lead and tin casting alloys for multilayer plain bearings
• Effective Date: 17-Jul-2010

Overview

ISO 4381:2011 - Plain bearings - Tin casting alloys for multilayer plain bearings specifies requirements for bearing metals based on tin casting alloys used in multilayer plain bearings. The standard defines the chemical composition and material properties of the original unprocessed casting alloy (representative samples). It notes that test results on finished bearings can differ because of production effects and therefore should not be directly compared with the raw-material data in ISO 4381:2011.

Key topics and requirements

• Material scope: Tin-based casting alloys intended for multilayer plain bearings; principal alloy designated SnSb8Cu4.
• Chemical composition: Element limits are specified (example: Sb 7–8 %, Cu 3–4 %, remainder Sn) and strict impurity limits (Pb, As, Bi, Fe, Al, Zn, Cd, total others). Chemical analysis is decisive for acceptance.
• Material properties: Typical values provided for designers, measured on the unprocessed material. Included properties:
  • Brinell hardness at 20 °C and 100 °C (measured per ISO 4384-2)
  • Tensile and compressive yield stress and tensile strength at 20 °C (typical mean values)
  • Bond strength (to be assessed per ISO 4386-2)
  • Rotating bar bending fatigue (tested according to ISO 1143)
  • Linear thermal expansion, melting and casting temperatures, and density
• Designation: Example format - Bearing metal ISO 4381 - SnSb8Cu4.
• Selection guidance: Annex A provides practical guidance on use and recommends minimum mating-shaft hardness (for SnSb8Cu4 the shaft minimum is 160 HB) to avoid welding under operating conditions. Lubrication and working conditions affect shaft material choice.

Applications and users

ISO 4381:2011 is relevant to:

• Bearing designers and mechanical engineers working on multilayer plain bearings
• Manufacturers of bearing alloys and multilayer bearing components (casting, bonding, machining)
• Quality and inspection personnel performing material acceptance testing for tin casting alloys
• OEMs in heavy industry (e.g., rolling mills), automotive, and machinery where tin-based bearing layers (good conformability, embeddability and high sliding performance) are specified

Practical use cases include selection of alloy for high-load sliding surfaces, wrapped bushes, thin-walled liners (up to ~3 mm), and thrust washers where SnSb8Cu4 properties are advantageous.

Related standards

• ISO 4384-2 - Hardness testing of bearing metals (solid materials)
• ISO 4386-1, -2, -3 - Testing and inspection of metallic multilayer plain bearings (ultrasonic, destructive bond testing, penetrant testing)
• ISO 1143 - Rotating bar bending fatigue testing

Keywords: ISO 4381:2011, tin casting alloys, SnSb8Cu4, multilayer plain bearings, bearing metals, chemical composition, Brinell hardness, bond strength.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2015
1DGRPHãþD
SIST ISO 4381:2002
'UVQLOHåDML6YLQþHYHLQNRVLWURYH]OLWLQH]DYHþVORMQHGUVQHOHåDMH
Plain bearings - Tin casting alloys for multilayer plain bearings
Paliers lisses - Alliages moulés à base d'étain pour paliers lisses multicouches
Ta slovenski standard je istoveten z: ISO 4381:2011
ICS:
21.100.10 Drsni ležaji Plain bearings
77.120.60 Svinec, cink, kositer in Lead, zinc, tin and their
njihove zlitine alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 4381
Fourth edition
2011-11-01
Plain bearings — Tin casting alloys for
multilayer plain bearings
Paliers lisses — Alliages moulés à base d’étain pour paliers lisses
multicouches
Reference number
©
ISO 2011
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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Requirements . 1
3.1 Chemical composition . 1
3.2 Material properties . 1
3.3 Selection of material . 1
4 Designation . 3
Annex A (informative) Guidance on use of bearing metals and the hardness of the mating bearing part
(shaft) . 4
Bibliography . 5
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 4381 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 2, Materials
and lubricants, their properties, characteristics, test methods and testing conditions
...

INTERNATIONAL ISO
STANDARD 4381
Fourth edition
2011-11-01
Plain bearings — Tin casting alloys for
multilayer plain bearings
Paliers lisses — Alliages moulés à base d’étain pour paliers lisses
multicouches
Reference number
©
ISO 2011
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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Requirements . 1
3.1 Chemical composition . 1
3.2 Material properties . 1
3.3 Selection of material . 1
4 Designation . 3
Annex A (informative) Guidance on use of bearing metals and the hardness of the mating bearing part
(shaft) . 4
Bibliography . 5
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 4381 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 2, Materials
and lubricants, their properties, characteristics, test methods and testing conditions.
This fourth edition cancels and replaces the third edition (ISO 4381:2000), which has been technically revised.
iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 4381:2011(E)
Plain bearings — Tin casting alloys for multilayer plain bearings
1 Scope
This International Standard specifies requirements for bearing metals based on tin casting alloys for multilayer
pl
...