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、21.060.20!$aZU“1625550www.din.deDDIN EN ISO 3506-2Mechanical properties of corrosion-resistant stainless steel fasteners Part 2: Nuts (ISO 3506-2:2009)English translation of DIN EN ISO 3506-2:2010-04Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Sthlen Teil 2: Muttern (ISO 350
3、6-2:2009)Englische bersetzung von DIN EN ISO 3506-2:2010-04Caractristiques mcaniques des lments de fixation en acier inoxydable rsistant lacorrosion Partie 2: crous (ISO 3506-2:2009)Traduction anglaise de DIN EN ISO 3506-2:2010-04SupersedesDIN EN ISO 3506-2:1998-03www.beuth.deIn case of doubt, the G
4、erman-language original shall be considered authoritative.Document comprises 29 pages03.10 DIN EN ISO 3506-2:2010-04 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 Technical Committee CEN/TC
5、 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 nichtrostendem und
6、temperaturbestndigem Stahl. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 68-1 DIN ISO 68-1 ISO 261 DIN ISO 261 ISO 262 DIN ISO 262 ISO 722 DIN ISO 722 ISO 898-2 DIN EN ISO 898-2 ISO 898-6 DIN EN ISO 898-6 ISO 3506-1 DIN EN ISO 3506-1
7、 ISO 3651-1 DIN EN ISO 3651-1 ISO 3651-2 DIN EN ISO 3651-2 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 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 3506-2:1998-03 as follows:
8、 a) The temperature range has been changed from between 15 C and 25 C to between 10 C and 35 C. b) Clause 3 “Symbols” has been added. c) In subclause 4.2.3 “Nuts”, information relating to nuts with reduced loading capacity has been included. d) Subclause 4.2.4 relating to the marking of packages has
9、 been given in more detail. e) In subclause 4.3 “Finish”, symbol “P” has been added for marking passivated nuts. f) In Table 1, the copper content for steel grade A4 has been increased from 1 % to 4 %. g) Steel grades A3 and A5 have been included in Tables E.1 and E.2. Previous editions DIN 267-11:
10、1968-05, 1977-02, 1980-01 DIN ISO 3506: 1992-12 DIN EN ISO 3506-2: 1998-03 DIN EN ISO 3506-2:2010-04 3 National Annex NA (informative) Bibliography DIN EN 20898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread DIN EN ISO 898-6, Mechanical properties o
11、f fasteners Part 6: Nuts with specified proof load values Fine pitch thread DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant 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:
12、Austenitic and ferritic-austenitic (duplex) stainless steels Corrosion test in nitric acid medium by measurement of loss in mass (Huey test) DIN EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) sta
13、inless steels Corrosion test in media containing sulfuric acid 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 DIN EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test met
14、hod (scales A, B, C, D, E, F, G, H, K, N, T) 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 ISO 68-1, ISO general purpose metric screw
15、threads Basic profile Part 1: Metric screw threads DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 262, ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts DIN ISO 272, Fasteners Width across flats for hexagon products DIN EN ISO 3506-2:2010-
16、04 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3506-2 November 2009 ICS 21.060.20 Supersedes EN ISO 3506-2:1997English Version Mechanical properties of corrosion-resistant stainless steel fasteners - Part 2: Nuts (ISO 3506-2:2009) Caractristiques mcani
17、ques des lments de fixation en acier inoxydable rsistant la corrosion - Partie 2: crous (ISO 3506-2:2009) Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Sthlen - Teil 2: Muttern (ISO 3506-2:2009) This European Standard was approved by CEN on 24 October 2009. CEN members are bo
18、und 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 application to the
19、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 has the same st
20、atus 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, Portugal, Roman
21、ia, 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 means reserved w
22、orldwide for CEN national Members. Ref. No. EN ISO 3506-2:2009: EContents DIN EN ISO 3506-2:2010-04 EN ISO 3506-2:2009 (E) 2 Page Foreword .3 Introduction.4 1 Scope5 2 Normative references6 3 Symbols6 4 Designation, marking and finish7 4.1 Designation 7 4.2 Marking.8 4.3 Finish 10 5 Chemical composi
23、tion 10 6 Mechanical properties.11 7 Test methods .12 7.1 Hardness HB, HRC or HV12 7.2 Proof load.12 Annex A (informative) Description of the groups and grades of stainless steels .13 Annex B (informative) Stainless steel composition specifications .16 Annex C (informative) Stainless steels for cold
24、 heading and extruding.19 Annex D (informative) Austenitic stainless steels with particular resistance to chloride induced stress corrosion 21 Annex E (informative) Mechanical properties at elevated temperatures; application at low temperatures22 Annex F (informative) Time-temperature diagram of int
25、ergranular corrosion in austenitic stainless steels, grade A2 (18/8 steels) .23 Annex G (informative) Magnetic properties for austenitic stainless steels24 Bibliography25 Foreword collaboration with Technical Committee CEN/TC 185 “Fasteners”, the secretariat of which is held by DIN. This European St
26、andard 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 to the possibility that some of the elements of this d
27、ocument 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 3506-2:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
28、 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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, S
29、weden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 3506-2:2009 has been approved by CEN as a EN ISO 3506-2:2009 without any modification. This document (EN ISO 3506-2:2009) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in DIN EN ISO 3506-2:2010-04 EN ISO 35
30、06-2:2009 (E) 3 Introduction 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 fasteners. Ferritic and austenitic stainle
31、ss 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 property classes and the test procedures for mechanical properti
32、es. The latter differ from the carbon steel and low-alloy steel fastener test procedures with regard to the measurement of the stress at 0,2 % permanent strain (yield stress) and ductility (total elongation after fracture). DIN EN ISO 3506-2:2010-04 EN ISO 3506-2:2009 (E) 4 1 Scope This part of ISO
33、3506 specifies the mechanical properties of nuts made of austenitic, martensitic and ferritic steel grades of corrosion-resistant stainless steels, 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 nuts: w
34、ith nominal thread diameter D u 39 mm; of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and ISO 262; of any shape; with width across flats as specified in ISO 272; with nominal heights m W 0,5D. It does not apply to nuts requiring properties such as lo
35、cking abilities, and weldability. NOTE The designation system of this part of ISO 3506 can be used for sizes outside the limits given in this clause (e.g. D 39 mm), provided that all applicable mechanical and physical requirements of the property classes are met. This part of ISO 3506 does not defin
36、e corrosion or oxidation resistance in particular environments. However, some information on materials for particular environments is given in Annex D. Regarding definitions of corrosion and corrosion resistance, see ISO 8044. The aim of this part of ISO 3506 is the classification of corrosion-resis
37、tant stainless steel nuts into property classes. Some materials can be used at temperatures down to 200 C, some can be used at temperatures up to + 800 C in air. Information on the influence of temperature on mechanical properties is found in Annex E. Corrosion and oxidation performances and mechani
38、cal properties for use at elevated or sub-zero temperatures can be agreed on between the user and the manufacturer in each particular case. Annex F shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content. DIN EN ISO 3506-2:2010-04 EN ISO 3506-2:2009 (E) 5
39、 All austenitic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working, some magnetic properties can be evident (see Annex G). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere
40、nces, 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 screw threads Basic profile Part 1: Metric screw threads ISO 261, ISO general purpose metric screw threads General plan ISO 26
41、2, ISO general purpose metric screw threads Selected sizes for screws, bolts and nuts ISO 272, Fasteners Hexagon products Widths across flats ISO 898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread ISO 898-6, Mechanical properties of fasteners Part 6
42、: Nuts with specified proof load values Fine pitch thread 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 test) ISO 36
43、51-2, 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 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6507-1, Metall
44、ic 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 stainless-steel fasteners ISO 16426, Fasteners Quality assurance system 3 Symbols D
45、nominal thread diameter m height of the nut (nominal value) P pitch of the thread ReLlower yield stress Rp0,2stress at 0,2 % permanent strain s width across flats Spstress under proof load rpermeability value in a magnetic field DIN EN ISO 3506-2:2010-04 EN ISO 3506-2:2009 (E) 6 4 Designation, marki
46、ng and finish 4.1 Designation The designation system for stainless steel grades and property classes for nuts 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 property c
47、lass. The designation of the steel grade (first block) consists 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 1). The designat
48、ion of the property class (second block) consists of two digits for nuts with height m W 0,8D (style 1 or style 2 or hexagon flange nuts), representing 1/10 of the stress under proof load, and three digits for nuts with height 0,5D u m 0,8D (thin nuts/style 0), the first digit “0” indicating that th
49、e nut has a reduced loadability and the following digits representing 1/10 of the stress under proof load. The following are examples for the designation of material. EXAMPLE 1 A2-70 indicates: austenitic steel, cold worked, minimum 700 MPa stress under proof load (nut with m W 0,8D). EXAMPLE 2 C4-70 indicates: martensitic steel, hardened and tempered, minimum 700 MPa stress under proof load (nut with m W 0,8D). EXAMPLE 3 A
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