1、April 2010 Translation by DIN-Sprachendienst.English price group 13No 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、21.060.10!$aZi“1625570www.din.deDDIN EN ISO 3506-4Mechanical properties of corrosion-resistant stainless steel fasteners Part 4: Tapping screws (ISO 3506-4:2009)English translation of DIN EN ISO 3506-4:2010-04Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Sthlen Teil 4: Blechs
3、chrauben (ISO 3506-4:2009)Englische bersetzung von DIN EN ISO 3506-4:2010-04Caractristiques mcaniques des lments de fixation en acier inoxydable rsistant lacorrosion Partie 4: Vis tle (ISO 3506-4:2009)Traduction anglaise de DIN EN ISO 3506-4:2010-04SupersedesDIN EN ISO 3506-4:2003-10www.beuth.deIn c
4、ase of doubt, the German-language original shall be considered authoritative.Document comprises 25 pages03.10 DIN EN ISO 3506-4:2010-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technic
5、al Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Verbin-dungselemente (Fasteners Standards Committee), Working Committee NA 067-02-03 AA Mechanische Eigenschaften fr Schrauben und Muttern aus
6、nichtrostendem und temperaturbestndigem Stahl. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1478 DIN EN ISO 1478 ISO 3506-1 DIN EN ISO 3506-1 ISO 3651-1 DIN EN ISO 3651-1 ISO 3651-2 DIN EN ISO 3651-2 ISO 6507-1 DIN EN ISO 6507-1 ISO
7、8044 DIN EN ISO 8044 ISO 16048 DIN EN ISO 16048 ISO 16426 DIN EN ISO 16426 Amendments This standard differs from DIN EN ISO 3506-4:2003-10 as follows: a) The temperature range has been changed from between 15 C and 25 C to between 10 C and 35 C. b) In subclause 3.3 “Finish”, symbol “P” has been adde
8、d for marking passivated tapping screws. c) In Table 2, the copper content for steel grade A4 has been increased from 1 % to 4 %. d) In subclause 6.3 “Torsional strength test”, the accuracy of the torque-measuring device has been brought in line with the state of the art. e) In subclause 6.4 “Drive
9、test”, the upper/lower limit of the test plate hardness has been increased by 5 HV. Previous editions DIN EN ISO 3506-4: 2003-10 DIN EN ISO 3506-4:2010-04 3 National Annex NA (informative) Bibliography DIN EN ISO 1478, Tapping screw thread DIN EN ISO 3506-1, Mechanical properties of corrosion-resist
10、ant stainless-steel fasteners Part 1: Bolts, screws and studs DIN EN ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels Corrosion test in nitric acid medium by measurement of loss in mass (Huey t
11、est) DIN EN 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 DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test
12、method DIN EN ISO 8044, Corrosion of metals and alloys Basic terms and definitions DIN EN ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners DIN EN ISO 16426, Fasteners Quality assurance system DIN EN ISO 3506-4:2010-04 4 This page is intentionally blank EUROPEAN STANDARD NORME
13、EUROPENNE EUROPISCHE NORM EN ISO 3506-4 November 2009 ICS 21.060.10 Supersedes EN ISO 3506-4:2003English Version Mechanical properties of corrosion-resistant stainless steel fasteners - Part 4: Tapping screws (ISO 3506-4:2009) Caractristiques mcaniques des lments de fixation en acier inoxydable rsis
14、tant la corrosion - Partie 4: Vis tle (ISO 3506-4:2009) Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Sthlen - Teil 4: Blechschrauben (ISO 3506-4:2009) This European Standard was approved by CEN on 24 October 2009. CEN members are bound to comply with the CEN/CENELEC Internal
15、 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 CEN Management Centre or to any CEN member.
16、 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 has the same status as the official versions. CEN members
17、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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swit
18、zerland 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 means reserved worldwide for CEN national Members. Ref. No.
19、 EN ISO 3506-4:2009: EContents DIN EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 2 Page Foreword .3 Introduction.4 1 Scope5 2 Normative references5 3 Designation, marking and finish6 3.1 Designation 6 3.2 Marking.7 3.3 Finish 8 4 Chemical composition 8 5 Mechanical properties.9 5.1 General .9 5.2 Sur
20、face hardness 9 5.3 Core hardness .10 5.4 Torsional strength.10 5.5 Thread forming capability 10 6 Test methods .10 6.1 Surface hardness test.10 6.2 Core hardness test10 6.3 Torsional strength test10 6.4 Drive test 12 Annex A (normative) Description of the groups and grades of stainless steels .13 A
21、nnex B (informative) Stainless steel for cold heading and extruding.16 Annex C (informative) Austenitic stainless steels with particular resistance to chloride induced stress corrosion 18 Annex D (informative) Time-temperature diagram of intergranular corrosion in austenitic stainless steels, grade
22、A2 (18/8 steels).19 Annex E (informative) Magnetic properties for austenitic stainless steels 20 Bibliography21 Foreword 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, ei
23、ther 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 to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CEN
24、ELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 3506-4:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
25、lgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement noti
26、ce The text of ISO 3506-4:2009 has been approved by CEN as a EN ISO 3506-4:2009 without any modification. DIN EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 3 This document (EN ISO 3506-4:2009) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in Introduction In the preparation of this par
27、t 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 fasteners. Ferritic and austenitic stainless steels are strengthened only by cold working and consequ
28、ently, 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 procedures for mechanical properties. The primary objective of this part of ISO 3506 is to en
29、sure that corrosion-resistant austenitic, martensitic and ferritic stainless steel tapping screws will form mating threads in materials such as aluminium into which they are normally driven without deforming their own thread and without breaking during assembly or service. Selection of the steel gro
30、up is based on the intended application. DIN EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 4 1 Scope This part of ISO 3506 specifies the mechanical properties of tapping screws made of austenitic, martensitic and ferritic steel grades of corrosion-resistant stainless steels, when tested over an ambie
31、nt temperature range of 10 C to 35 C. Properties vary at higher or lower temperatures. It applies to tapping screws with threads from ST2,2 up to and including ST8, in accordance with ISO 1478. It does not apply to screws with special properties, such as weldability. NOTE The designation system of t
32、his part of ISO 3506 can be used for sizes outside the limits given in this clause (e.g. d ST8), 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 environments. Howe
33、ver, some information on materials for particular environments is given in Annex C. Regarding definitions of corrosion and corrosion resistance, see ISO 8044. The aim of this part of ISO 3506 is the classification of corrosion-resistant stainless steel tapping screws into hardness classes. Corrosion
34、 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 particular case. Annex D shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content. All austeni
35、tic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working, some magnetic properties can be evident (see Annex E). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t
36、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1478, Tapping screws thread ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels Part 1: Austenitic and ferritic-austenitic (duple
37、x) stainless steels Corrosion 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
38、 sulfuric acid DIN EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 5 ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners ISO 16426, Fasteners Quality assurance system 3 Designation, marking and finish 3.1 Desig
39、nation The designation system for stainless steel grades and hardness classes for tapping screws is given in Figure 1. The designation of the material consists of two blocks, which are separated by a hyphen. The first block designates the steel grade and the second block, the hardness class. The des
40、ignation of the steel grade (first block) consists of one of the letters A for austenitic steel, C for martensitic steel, or F for ferritic steel which indicates the group of steel and a digit, which indicates a range of chemical compositions within this steel group (see Table 2). The designation of
41、 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 Vickers hardness Hardness class 20H 25H 30H 40H Vickers hardness, HV min. 200 250
42、 300 400 EXAMPLE 1 A4-25H indicates: austenitic steel of steel grade A4, cold worked, minimum hardness 250 HV. EXAMPLE 2 C3-40H indicates: martensitic steel of steel grade C3, hardened and tempered, minimum hardness 400 HV. DIN EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 6 aThe steel groups and ste
43、el grades classified in Figure 1 are described in Annex A and 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-25H cTapping screws passivated in accordance with
44、 ISO 16048 may additionally be marked with a “P”. EXAMPLE A4-25HP Figure 1 Designation system for stainless steel grades and hardness classes for tapping screws 3.2 Marking 3.2.1 General Marking of tapping screws is not mandatory. When tapping screws manufactured according to the requirements of thi
45、s 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 al
46、l 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 tapping screws which are marked with a hardness class symbol, provided this is possible for technical reason
47、s. Manufacturers identification marking is also recommended on tapping screws which are not marked with a hardness class symbol. 3.2.3 Tapping screws When tapping screws are marked, they shall be clearly marked in accordance with 3.1. The marking should include the steel grade and hardness class. DI
48、N EN ISO 3506-4:2010-04 EN ISO 3506-4:2009 (E) 7 3.2.4 Packages All packages for all types of tapping screws of all sizes shall be marked (e.g. through labelling). The marking shall include the manufacturers and/or distributors identification and the marking symbol for the steel grade and hardness c
49、lass according to Figure 1 and the manufacturing lot number, as defined in ISO 16426. 3.3 Finish Unless otherwise specified, tapping screws in accordance with this part of 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. Tapping screws that are passivated may additionally be marked with the symbol “P” after the symbols for steel grade and hardness clas
