BS-EN-20898-1-1992 ISO-898-1-1988.pdf
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1、BRITISH STANDARD BS EN 20898-1:1992 ISO 898-1:1988 Reprinted, incorporating Amendment No. 1 Mechanical properties of fasteners Part 1: Bolts, screws and studs The European Standard EN 20898-1:1991 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:13:23 GM
2、T+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20898-1:1992 This British Standard, having been prepared under the direction of the General Mechanical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 1 April 1992 BSI 01-1999 The
3、 following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment 86/74337 DC ISBN 0 580 20628 9 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national st
4、andards organizations of the following countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHe
5、llenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund
6、 PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments 7300July 199
7、2Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:13:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20898-1:1992 BSI 01-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 1Scope and field of application3 2
8、References3 3Designation system3 4Materials3 5Mechanical properties6 6Mechanical properties to be determined7 7Minimum ultimate tensile loads and proofing loads8 8Test methods11 9Marking18 Annex Properties at elevated temperature20 National annex NA (informative)Inside back cover National annex NB (
9、informative)Inside back cover Figure 1 Test piece for tensile test12 Figure 2 Application of proofing load to full-size bolts13 Figure 3 Wedge loading of full-size bolts14 Figure 4 Head soundness test15 Figure 5 Zones of decarburization17 Figure 6 Hardness measurements for decarburization test17 Fig
10、ure 7 Examples of marking on hexagon bolts and screws18 Figure 8 Examples of marking on hexagon socket head cap screws18 Figure 9 Marking of stud19 Figure 10 Left-hand thread marking19 Figure 11 Alternative left-hand thread marking19 Table 1 System of coordinates4 Table 2 Steels5 Table 3 Mechanical
11、properties of bolts, screws and studs6 Table 4 Key to test programmes7 Table 5 Test programmes A and B for acceptance purposes7 Table 6 Minimum ultimate tensile loads ISO metric coarse pitch thread8 Table 7 Proofing loads ISO metric coarse pitch thread9 Table 8 Minimum ultimate tensile loads ISO met
12、ric fine pitch thread10 Table 9 Proofing loads ISO metric fine pitch thread10 Table 10 Hole diameters for wedge loading test14 Table 11 Wedge dimensions15 Table 12 Values of angle b15 Table 13 Values for H1 and E17 Table 14 Marking symbols18 Table 15 Identification marks for studs19 Table 16 Propert
13、ies at elevated temperature20 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:13:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 20898-1:1992 ii BSI 01-1999 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Pol
14、icy Committee and is the English language version of EN 20898-1 “Mechanical properties of fasteners Part 1: Bolts, screws and studs”, published by the European Committee for Standardization (CEN). EN 20898-1 was produced as a result of international discussion in which the UK took an active part. It
15、 is one of a series of standards that are under preparation based on ISO 898. This Part of this standard is based on ISO 898-1:1988 “Mechanical properties of fasteners Part 1: Bolts, screws and studs”, published by the International Organization for Standardization (ISO). BS EN 20898-2 is also publi
16、shed. BS 6104-1:1981, which was technically equivalent to ISO 898-1:1988, is now superseded by this British Standard and has been withdrawn in accordance with the CEN/CENELEC Internal Regulations. Attention is drawn to the fact that at a recent meeting of Technical Committee ISO/TC2/SC1 a resolution
17、 was approved which put forward an amendment to ISO 898-1:1988 (upon which BS EN 20898-1:1992 is based), altering clause 1 by rewriting the last paragraph, to insert after + 300 C “(+ 250 C for 10.9)”. A British Standard does not purport to include all the necessary provisions of a contract. Users o
18、f British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 20, an inside
19、back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 01 05:13:23 GMT+00:00 2006, Uncontrolled Copy, (c) B
20、SI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 20898-1 February 1991 UDC 621.882.2-034.14:620.17 Descriptors: Fasteners, bolts, screws, studs, specifications, mechanical properties, tests, designation, marking English version Mechanical properties of fasteners Part 1: Bolts, screws and stud
21、s (ISO 898-1:1988) Caractristiques mcaniques des lments de fixation Partie 1: Boulons, vis et goujons (ISO 898-1:1988) Mechanische Eigenschaften von Verbindungselementen Teil 1: Schrauben (ISO 898-1:1988) This European Standard was approved by CEN on 1991-02-11. CEN members are bound to comply with
22、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
23、 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 ve
24、rsions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normali
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