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1、International Standard ( 8839 0 N 4 4g!i!b INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON*MEYHAPO/JHAR OPrAHb43AMFl fl0 CTAHPTH3AWWORGANISATION INTERNATIONALE DE NORMALISATION Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals CaracMstiques mkcaniques des D
2、escriptors : non ferrous products, fasteners, bolts, screws, studs, nuts (fasteners), specifications, mechanical properties, tests. designation, marking. E Price based on 4 pages Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies
3、(IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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, g
4、overn- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordan
5、ce with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 8839 was prepared by Technical Committee ISO/TC 2, Fasteners. Users should note that all International Standards undergo revision from time to time and that any reference made herein to an
6、y other International Standard implies its latest edition, unless otherwise stated. Q International Organization for Standardization, 1986 l Printed in Switzerland INTERNATIONAL STANDARD IS0 8839-1986 (E) Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals 1
7、 Scope and field of application This International Standard specifies the mechanical properties of bolts, screws, studs and nuts - with nominal thread diameters, d, from Ml,6 to M39 inclusive; - with metric IS0 thread in accordance with IS0 261; - made of copper and copper alloys or aiuminium and al
8、uminium alloys. It does not apply to bolts, screws, studs and nuts with special property requirements such as - corrosion resistance; - electrical conductivity. 2 References IS0 1, Standard reference temperature for industrial length measurements. IS0 269, Wrought aluminium and aluminium alloys - Ch
9、emical composition of wrought products (per cent). 1) IS0 261, IS0 generalpurpose metric screw threads - General plan. IS0 426/l, Wrought copper-zinc alloys - Chemical composi- tion and forms of wrought products - Part 1: Non-leaded and special copper-zinc all0 ys. IS0 42612, Wrought copper-zinc all
10、oys - Chemical composi- tion and forms of wrought products - Part 2: Leaded copper- zinc all0 ys. IS0 427, Wrought copper-tin alloys - Chemical composition and forms of wrought products. IS0 420, Wrought copper-aluminium alloys .- Chemical com- position and forms of wrought products. IS0 696/l, Mech
11、anical properties of fasteners - Part I: Bolts, screws and studs.2) IS0 698/2, Mechanical properties of fasteners - Part 2: Nuts with specified proof load values. I) At present at the stage of draft. (Revision of ISOIR 209-1971.) 2) At present at the stage of draft. (Revision of IS0 89811-1978.) 3)
12、At present at the stage of draft. IS0 X3/7, Mechanical properties of fasteners - Part 7: Torque test for bolts and screws with thread sizes from Ml to MIO. 3) IS0 1187, Special wrought copper alloys - Chemical composi- tion and forms of wrought products. IS0 1337, Wrought copper (having minimum copp
13、er contents of 9995 %) - Chemical composition and forms of wrought products. 3 Designation system and materials Table 1 lists the symbols for the material to be used in the designation and for marking purposes (see clause 7); reference is made to the relevant International Standard. Table 1 - Symbol
14、s for materials Bolts, screws, studs and nuts made of non-ferrous metals shall be designated in accordance with following example: Designation of a hexagon head bolt IS0 4614 - Ml2 x 86 made of CuZn37 (see table 1 for appropriate material symbol) : Hexagon head bolt IS0 4014 - Ml2 x 80 - CU2 IS0 883
15、9-1986 (El 4 Mechanical properties When tested at the standard reference temperature of 20 “C (see IS0 II using the methods described in clause 6, the bolts, screws, studs and nuts shall have the mechanical properties set out in table 2. 5 Mechanical p,roperties to be tested Table 3 specifies which
16、tests shall be carried out on bolts, screws, studs and nuts. Other tests shall be subject to agree- ment between the customer and the supplier. NOTE - In case of high forming operations (e.g. special parts), the mechanical properties should be agreed between the customer and the supplier. Table 2 -
17、Mechanical properties Material thread diameter after fracture Table 3 - Mechanical properties to be tested Nominal Test(s) to be carried out on thread diameter bolts, screws and studs nuts d d M5 Tensile test (also, if required, stress at permanent set limit and percentage elongation after fracture)
18、 load test 2 IS0 8839-1986 (El 6 Test methods 6.1 Tensile test applicable to bolts, screws and studs For testing the stress at permanent set limit, I?, and the percentage elongation after fracture, machined test pieces shall be used and the test shall be carried out as specified in IS0 8%/l. In gene
19、ral for tensile testing, a full size bolt, screw or stud shall be used and the test shall be carried out as specified in IS0 898/l, For minimum breaking loads, see table 4. Table 4 - Minimum breaking loads M3 M3.5 M4 M5 M6 M7 ME Ml0 Ml2 Ml4 Ml8 M20 M22 M24 M36 M39 u Symbols for materials 61 z I =k .
20、s z B+., El GUI cu2 I cu3 cu4 cu5 CU6 cu7 AL1 AL2 AL3 AL4 AL5 AL6. iI:” 5 SE Minimum breaking loads ) P 4 4 x L mm mm2 0,5 1 5,03 1,25 1 36,6 3,5 1 561 4 1 976 N 1) For nuts, proof load. 3 IS0 8839-1986 (El 6,2 Torsional strength test In general for torsional strength testing, a full size bolt or screw shall be used and the test shall be carried out as described in IS0 898 4,l 5,l 2,4 Z7 23 3,7 4 4,5 -,-,-