1、BS EN ISO3506-3:2009ICS 21.060.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMechanical propertiesof corrosion-resistantstainless steelfastenersPart 3: Set screws and similarfasteners not under tensile stressThis British Standardwas published under theauthor
2、ity of the StandardsPolicy and StrategyCommittee on 31 December2009. BSI 2009ISBN 978 0 580 58918 8Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 3506-3:2009National forewordThis British Standard is the UK implementation of EN ISO 3506-3:2009.It supersedes BS EN ISO 3506-3:1998
3、 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/1, Mechanical properties of fasteners.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary
4、provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3506-3 November 2009 ICS 21.060.10 Supersedes EN ISO 3506-3:1997English Version Mechanic
5、al properties of corrosion-resistant stainless steel fasteners - Part 3: Set screws and similar fasteners not under tensile stress (ISO 3506-3:2009) Caractristiques mcaniques des lments de fixation en acier inoxydable rsistant la corrosion - Partie 3: Vis sans tte et lments de fixation similaires no
6、n soumis des contraintes de traction (ISO 3506-3:2009) Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Sthlen - Teil 3: Gewindestifte und hnliche nicht auf Zug beanspruchte Verbindungselemente (ISO 3506-3:2009) This European Standard was approved by CEN on 24 October 2009. CEN
7、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 appli
8、cation to the CEN 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 Management Centre h
9、as the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P
10、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any me
11、ans reserved worldwide for CEN national Members. Ref. No. EN ISO 3506-3:2009: EBS EN ISO 3506-3:2009EN ISO 3506-3:2009 (E) 3 Foreword This document (EN ISO 3506-3:2009) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners”, the
12、 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 by May 2010, and conflicting national standards shall be withdrawn at the latest by May 2010. Attention is drawn
13、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 3506-3:1997. According to the CEN/CENELEC Internal Regulations, the natio
14、nal standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P
15、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 3506-3:2009 has been approved by CEN as a EN ISO 3506-3:2009 without any modification. BS EN ISO 3506-3:2009ISO 3506-3:2009(E) ISO 2009 All rights reserved iiiContents
16、Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Designation, marking and finish2 3.1 Designation 2 3.2 Marking.3 3.3 Finish 4 4 Chemical composition 4 5 Mechanical properties.5 5.1 General .5 5.2 Proof torque of hexagon socket set screws.5 5.3 Hardness 6 6 Test methods .6 6.1 Proo
17、f torque test for hexagon socket set screws6 6.2 Hardness test HB, HRB or HV for set screws.7 Annex A (normative) Description of the groups and grades of stainless steels .8 Annex B (informative) Austenitic stainless steel composition specifications .11 Annex C (informative) Austenitic stainless ste
18、els for cold heading and extruding.13 Annex D (informative) Time-temperature diagram of intergranular corrosion in austenitic stainless steels, grade A2 (18/8 steels).15 Annex E (informative) Magnetic properties for austenitic stainless steels 16 Bibliography17 BS EN ISO 3506-3:2009ISO 3506-3:2009(E
19、) iv ISO 2009 All rights reservedForeword 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 inte
20、rested 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 Electrotechnica
21、l 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 t
22、echnical 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. I
23、SO shall not be held responsible for identifying any or all such patent rights. ISO 3506-3 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical properties of fasteners. This second edition cancels and replaces the first edition (ISO 3506-3:1997), which has been tech
24、nically revised. ISO 3506 consists of the following parts, under the general title Mechanical properties of corrosion-resistant stainless steel fasteners: Part 1: Bolts, screws and studs Part 2: Nuts Part 3: Set screws and similar fasteners not under tensile stress Part 4: Tapping screws BS EN ISO 3
25、506-3:2009ISO 3506-3:2009(E) ISO 2009 All rights reserved vIntroduction In the preparation of this part of ISO 3506, special attention has been given to the fundamentally different property characteristics of the stainless steel fastener grades compared with those of carbon steel and low-alloy steel
26、 fasteners. Austenitic stainless steels are strengthened only by cold working and consequently the components do not have as homogeneous local material properties as hardened and tempered parts. These special features have been recognized in the elaboration of the hardness classes and the test proce
27、dures for mechanical properties. BS EN ISO 3506-3:2009BS EN ISO 3506-3:2009INTERNATIONAL STANDARD ISO 3506-3:2009(E) ISO 2009 All rights reserved 1Mechanical properties of corrosion-resistant stainless steel fasteners Part 3: Set screws and similar fasteners not under tensile stress 1 Scope This par
28、t of ISO 3506 specifies the mechanical properties of set screws and similar fasteners not under tensile stress made of austenitic stainless steel, when tested over an ambient temperature range of 10 C to 35 C. Properties vary at higher or lower temperatures. This part of ISO 3506 applies to set scre
29、ws and similar fasteners: with nominal thread diameter 1,6 mm u d u 24 mm; of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and ISO 262; of any shape. It does not apply to screws with special properties, such as weldability. NOTE The designation system
30、 of this part of ISO 3506 can be used for sizes outside the limits given in this clause (e.g. d 24 mm), provided that all applicable mechanical and physical requirements of the hardness classes are met. This part of ISO 3506 does not define corrosion or oxidation resistance in particular environment
31、s. The aim of this part of ISO 3506 is the classification of corrosion-resistant stainless steel fasteners into hardness classes. Corrosion and oxidation performances and mechanical properties for use at elevated or sub-zero temperatures can be agreed on between the user and the manufacturer in each
32、 particular case. Annex D shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content. All austenitic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working, some magnetic properties can be evident (see Annex E). 2 N
33、ormative references The following referenced documents are indispensable 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 68-1, ISO general purpose
34、 screw threads Basic profile Part 1: Metric screw threads ISO 261, ISO general purpose metric screw threads General plan BS EN ISO 3506-3:2009ISO 3506-3:2009(E) 2 ISO 2009 All rights reservedISO 262, ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts ISO 898-5, Mechan
35、ical properties of fasteners made of carbon steel and alloy steel Part 5: Set screws and similar threaded fasteners not under tensile stresses ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels C
36、orrosion test in nitric acid medium by measurement of loss in mass (Huey test) ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels Corrosion test in media containing sulfuric acid ISO 65
37、06-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 16048, Passivation of corrosion-resistant
38、 stainless-steel fasteners ISO 16426, Fasteners Quality assurance system 3 Designation, marking and finish 3.1 Designation The designation system for stainless steel grades and hardness classes for set screws and similar fasteners is given in Figure 1. The designation of the material consists of two
39、 blocks, which are separated by a hyphen. The first block designates the steel grade and the second block, the hardness class. The designation of the steel grade (first block) consists of the letter A for austenitic steel, which indicates the group of steel and a digit, which indicates a range of ch
40、emical compositions within this steel group (see Table 2). The designation of the hardness class (second block) consists of two digits representing 1/10 of the minimum Vickers hardness and the letter H, referring to hardness (see Table 1). Table 1 Designations of hardness classes in relation to Vick
41、ers hardness Hardness class 12H 21H Vickers hardness, HV min. 125 210 EXAMPLE A1-12H indicates: austenitic steel, soft, minimum hardness 125 HV. BS EN ISO 3506-3:2009ISO 3506-3:2009(E) ISO 2009 All rights reserved 3aThe steel groups and steel grades classified in Figure 1 are described in Annex A an
42、d specified by the chemical composition given in Table 2. bLow-carbon austenitic stainless steels with carbon content not exceeding 0,03 % may additionally be marked with an “L”. EXAMPLE A4L-21H cSet screws and similar fasteners passivated in accordance with ISO 16048 may additionally be marked with
43、 a “P”. EXAMPLE A4-21HP Figure 1 Designation system for stainless steel grades and hardness classes for set screws and similar fasteners 3.2 Marking 3.2.1 General Marking of set screws and similar fasteners is not mandatory. When set screws and similar fasteners manufactured to the requirements of t
44、his part of ISO 3506 are designated and marked, they shall be designated in accordance with the designation system described in 3.1 and marked in accordance with 3.2.2 and 3.2.3. However, the designation system described in 3.1 and the provisions for marking according to 3.2.3 shall be used only if
45、all relevant requirements of this part of ISO 3506 are met. 3.2.2 Manufacturers identification mark A manufacturers identification mark shall be included during the manufacturing process on all set screws and similar fasteners which are marked with a hardness class symbol, provided this is possible
46、for technical reasons. Manufacturers identification marking is also recommended on set screws and similar fasteners which are not marked with a hardness class symbol. 3.2.3 Set screws and similar fasteners When set screws and similar fasteners are marked, they shall be clearly marked in accordance w
47、ith 3.1. The marking should include the steel grade and hardness class. BS EN ISO 3506-3:2009ISO 3506-3:2009(E) 4 ISO 2009 All rights reserved3.2.4 Packages All packages for all types of set screws and similar fasteners of all sizes shall be marked (e.g. through labelling). The marking shall include
48、 the manufacturers and/or distributors identification and the marking symbol for the steel grade and hardness class according to Figure 1 and the manufacturing lot number, as defined in ISO 16426. 3.3 Finish Unless otherwise specified, set screws and similar fasteners in accordance with this part of
49、 ISO 3506 shall be supplied clean and bright. For maximum corrosion resistance, passivation is recommended. When passivation is required, it shall be performed in accordance with ISO 16048. Set screws and similar fasteners that are passivated may additionally be marked with the symbol “P” after the symbols for steel grade and hardness class (see footnote c of Figure 1). For set screws and similar fasteners manufactured to a specific order, the additional marking should be applied to b
