DIN EN ISO 898-2-2012 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2 Nuts with specified property classes - Coarse thread and fine pitch thread (I.pdf

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1、August 2012 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、 21.060.20!$VR“1905147www.din.deDDIN EN ISO 898-2Mechanical properties of fasteners made of carbon steel and alloysteel Part 2: Nuts with specified property classes Coarse thread and fine pitch thread (ISO 898-2:2012);English version EN ISO 898-2:2012,English translation of DIN EN ISO 898-2:2012-08M

3、echanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl undlegiertem Stahl Teil 2: Muttern mit festgelegten Festigkeitsklassen Regelgewinde und Feingewinde (ISO 898-2:2012);Englische Fassung EN ISO 898-2:2012,Englische bersetzung von DIN EN ISO 898-2:2012-08Caractristiques mcaniques d

4、es lments de fixation en acier au carbone et en acieralli Partie 2: crous de classes de qualit spcifies Filetages pas gros et filetages pas fin (ISO 898-2:2012);Version anglaise EN ISO 898-2:2012,Traduction anglaise de DIN EN ISO 898-2:2012-08SupersedesDIN EN 20898-2:1994-02 andDIN EN ISO 898-6:1996

5、-02www.beuth.deDocument comprises 28 pagesIn case of doubt, the German-language original shall be considered authoritative.07.12 DIN EN ISO 898-2:2012-08 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collabor

6、ation with Technical Committee CEN/TC 185 “Fasteners” (both secretariats are held by DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee), Working Committee NA 067-00-03 AA Verbindungselemente m

7、it metrischem Innengewinde. DIN EN ISO 898 consists of the following parts, under the general title Mechanical properties of fasteners made of carbon steel and alloy steel: Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread Part 2: Nuts with specified

8、 property classes Coarse thread and fine pitch thread Part 5: Set screws and similar threaded fasteners with specified hardness classes Coarse thread and fine pitch thread Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm)The DIN Standards correspon

9、ding to the International Standards referred to in Clause 2 of this document are as follows: ISO 68-1 DIN ISO 68-1 ISO 261 DIN ISO 261 ISO 262 DIN ISO 262 ISO 286-2 DIN ISO 286-2 ISO 898-1 DIN EN ISO 898-1 ISO 2320 DIN EN ISO 2320 ISO 4032 DIN EN ISO 4032 ISO 4033 DIN EN ISO 4033 ISO 6157-2 DIN EN I

10、SO 6157-2 ISO 6506-1 DIN EN ISO 6506-1 ISO 6507-1 DIN EN ISO 6507-1 ISO 6508-1 DIN EN ISO 6508-1 ISO 6892 DIN EN 10002-1 ISO 7500-1 DIN EN ISO 7500-1 ISO 10684 DIN EN ISO 10684 ISO 16047 DIN EN ISO 16047 ISO 16426 DIN EN ISO 16426 )During the next revision of the standard, the title of Part 7 will b

11、e harmonized with the titles of the other standards of this series. DIN EN ISO 898-2:2012-08 3 Amendments This standard differs from DIN EN 20898-2:1994-02 and DIN EN ISO 898-6:1996-02 as follows: a) the text of ISO 898-2:2012 has been adopted without any modification; b) the number of the standard

12、has been changed; c) the scope has been revised, M5 has been specified as the minimum nominal diameter; d) nominal diameters M3, M3,5 and M4 have been deleted; e) Table 1 has been supplemented by nut style 0 (thin nuts) and rendered more precise taking into account the ratio of the minimum height to

13、 the diameter; f) property class 4 has been deleted; g) property class 10 has been added for style 2; h) for property classes 5 and 6, the maximum carbon content has been increased; i) in Table 5, the proof load values for property classes 8 and 12 are no longer divided into style 1 and style 2; the

14、 lower values have been deleted; j) Table 6 relating to hardness properties has been revised, stress under proof load has been deleted and the heat treatment condition is now given in Table 3; k) specifications relating to inspection have been included in Clause 8; l) the previously normative specif

15、ications related to the thread stripping load are now dealt with in Annex A (informative); m) the proof load test has been rendered more precise; n) the hardness test is now given in more detail, taking into account the heat treatment condition; o) specifications for marking have been extended and r

16、endered more precise. Previous editions DIN 266: 1931x-03 DIN 589: 1931-07, 1934-01 DIN kr 550: 1936-03 DIN 267-1: 1937-04 DIN 267-2: 1937-04 DIN 267: 1940-06, 1943-01, 1954-01, 1960-12 DIN 267-4: 1968-05, 1971-10, 1983-08 DIN 267-8: 1968-04, 1971-10 DIN 267-23: 1983-08 DIN ISO 898-2: 1981-03 DIN IS

17、O 898-6: 1990-03, 1990-06 DIN EN 20898-2: 1994-02 DIN EN 20898-6: 1992-10 DIN EN ISO 898-6: 1996-02 DIN EN ISO 898-2:2012-08 4 National Annex NA (informative) Bibliography DIN EN 10002-1, Metallic materials Tensile testing Part 1: Method of testing at ambient temperature DIN EN ISO 898-1, Mechanical

18、 properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN ISO 2320, Prevailing torque type steel nuts Mechanical and performance properties DIN EN ISO 4032, Hexagon nuts, style 1 Product gr

19、ades A and B DIN EN ISO 4033, Hexagon nuts, style 2 Product grades A and B DIN EN ISO 6157-2, Fasteners Surface discontinuities Part 2: Nuts DIN EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method

20、 DIN EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-mea

21、suring system DIN EN ISO 10684, Fasteners Hot dip galvanized coatings DIN EN ISO 16047, Fasteners Torque/clamp force testing DIN EN ISO 16426, Fasteners Quality assurance system DIN ISO 68-1, ISO general purpose metric screw threads Basic profile Part 1: Metric screw threads DIN ISO 261, ISO general

22、 purpose metric screw threads General plan DIN ISO 262, ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts DIN ISO 286-2, ISO system of limits and fits Tables of standard tolerance grades and limit deviations for holes and shafts EUROPEAN STANDARD NORME EUROPENNE EURO

23、PISCHE NORM EN ISO 898-2 March 2012 ICS 21.060.20 Supersedes EN 20898-2:1993, EN ISO 898-6:1995English Version Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012) Caractristiques

24、 mcaniques des lments de fixation en acier au carbone et en acier alli - Partie 2: crous de classes de qualit spcifies - Filetages pas gros et filetages pas fin (ISO 898-2:2012) Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und legiertem Stahl - Teil 2: Muttern mit festgele

25、gten Festigkeitsklassen - Regelgewinde und Feingewinde (ISO 898-2:2012) This European Standard was approved by CEN on 14 March 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 sta

26、ndard 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

27、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 Re

28、public, Denmark, Estonia, Finland, 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 COMIT

29、EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 898-2:2012: EContents PageForeword .1 Scope 2 Normative reference

30、s .3 Symbols .4 Designation systems 4.1 Designation of nut styles 4.2 Designation of property classes .4.3 Ranges of nominal diameters in relation to nut style and property class .5 Design of bolt and nut assemblies .6 Materials .7 Mechanical properties 8 Inspection 8.1 Manufacturers inspection 8.2

31、Suppliers inspection .8.3 Purchasers inspection 9 Test methods 9.1 Proof load test 9.2 Hardness test . 149.3 Surface integrity inspection .1610 Marking .1610.1 General .1610.2 Identification mark of the manufacturer 1610.3 Marking of property classes .1610.4 Identification .1710.5 Marking of left-ha

32、nd thread 1810.6 Marking of packages 18Annex A (informative) Design principles of nuts .19Annex B (informative) Thread dimensions for the test mandrel Bibliography .24EN ISO 898-2:2012 (E) DIN EN ISO 898-2:2012-08 23455555667811111111121222Foreword This document (EN ISO 898-2:2012) has been prepared

33、 by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. 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

34、by September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. 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

35、such patent rights. This document supersedes EN 20898-2:1993, EN ISO 898-6:1995. 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 Republ

36、ic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 898-2:2012

37、 has been approved by CEN as a EN ISO 898-2:2012 without any modification. EN ISO 898-2:2012 (E) DIN EN ISO 898-2:2012-08 3 1 ScopeThis part of ISO 898 specifies mechanical and physical properties of nuts with coarse thread and fine pitch thread made of carbon steel and alloy steel when tested at an

38、 ambient temperature range of 10 C to 35 C.Nuts conforming to the requirements of this part of ISO 898 are evaluated at that ambient temperature range. It is possible that they do not retain the specified mechanical and physical properties at elevated and/or lower temperatures.NOTE 1 Nuts conforming

39、 to the requirements of this part of ISO 898 have been used in applications ranging from 50 C to +150 C. It is the responsibility of users to consult an experienced fastener materials expert for temperatures outside the range of 50 C to +150 C and up to a maximum temperature of +300C to determine ap

40、propriate choices for a given application.NOTE 2 Information for the selection and application of steels for use at lower and elevated temperatures is given for instance in EN 10269, ASTM F2281 and in ASTM A320/A320M.This part of ISO 898 is applicable to nuts:a) made of carbon steel or alloy steel;b

41、) with coarse thread M5 D M39, and fine pitch thread M81 D M393;c) with triangular ISO metric thread according to ISO 68-1;d) with diameter/pitch combinations according to ISO 261 and ISO 262;e) with specified property classes, including proof load;f) with different nut styles: thin nuts, regular nu

42、ts and high nuts;g) with minimum height m 0,45D;h) with a minimum outside diameter or width across flats s 1,45D (see Annex A);i) able to mate with bolts, screws and studs with property classes according to ISO 898-1.For hot dip galvanized nuts, see ISO 10684.This part of ISO 898 does not specify re

43、quirements for properties such as: prevailing torque properties (see ISO 2320); torque/clamp force properties (see ISO 16047 for test method); weldability; corrosion resistance.EN ISO 898-2:2012 (E) DIN EN ISO 898-2:2012-08 42 Normative referencesThe following referenced documents are indispensable

44、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 6157-2, Fasteners Surface discontinuities Part 2: NutsISO 6506-1, Metallic materials Brinell hardne

45、ss test Part 1: Test methodISO 6507-1, Metallic materials Vickers hardness test Part 1: Test methodISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatu

46、reISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring systemISO 16426, Fasteners Quality assurance system3 SymbolsFor the purposes of this document, the following symbols appl

47、y.D nominal thread diameter of the nut, in millimetresdhhole diameter of the grip, in millimetresF load, in newtonsh thickness of the grip, in millimetresm height of the nut, in millimetresP pitch of the thread, in millimetress width across flats, in millimetres4 Designation systems4.1 Designation o

48、f nut stylesThis part of ISO 898 specifies requirements for three styles of nuts according to their height: style 2: high nut with minimum height mmin 0,9D or mmin 0,9D; see Table A.1; style 1: regular nut with minimum height mmin 0,8D; see Table A.1; style 0: thin nut with minimum height 0,45D mminM16, 10 and 12 shall