1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series Steel X7CrNiAl17-7 (1.4568) Air melted Solution treated and precipitation hardened Sheet and strip a 6 mm 1 240 MPa Rm 1 450 MPaBS EN 2540:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2540 A
2、ugust 2018 ICS 49.025.10 English Version Aerospace series - Steel X7CrNiAl17-7 (1.4568) - Air melted - Solution treated and precipitation hardened - Sheet and strip - a 6 mm - 1 240 MPa Rm 1 450 MPaSrie arospatiale - Acier X7CrNiAl17-7 (1.4568) - labor lair - Mis en solution et durci par prcipitatio
3、n - Tles et bande - a 6 mm - 1 240 MPa Rm 1 450 MPa Luft- und Raumfahrt - Stahl X7CrNiAl17-7 (1.4568) - Lufterschmolzen - Lsungsgeglht und ausgelagert - Bleche und Bnder - a 6 mm - 1 240 MPa Rm 1 450 MPa This European Standard was approved by CEN on 13 May 2018. CEN members are bound to comply with
4、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 CEN-CENELEC Managem
5、ent 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-CENELEC Management Centre has the same statu
6、s as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
7、 Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussel
8、s 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2540:2018 ENational forewordThis British Standard is the UK implementation of EN 2540:2018.The UK participation in its preparation was entrusted to Technical Committee ACE/61/-
9、/15, Steels for Aerospace Purposes.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Insti
10、tution 2018 Published by BSI Standards Limited 2018ISBN 978 0 539 00014 6ICS 49.025.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2018.Amendments/c
11、orrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 2540:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2540 August 2018 ICS 49.025.10 English Version Aerospace series - Steel X7CrNiAl17-7 (1.4568) - Air melted - Solution treated and precipitation hardened - Sheet and
12、 strip - a 6 mm - 1 240 MPa Rm 1 450 MPaSrie arospatiale - Acier X7CrNiAl17-7 (1.4568) - labor lair - Mis en solution et durci par prcipitation - Tles et bande - a 6 mm - 1 240 MPa Rm 1 450 MPa Luft- und Raumfahrt - Stahl X7CrNiAl17-7 (1.4568) - Lufterschmolzen - Lsungsgeglht und ausgelagert - Blech
13、e und Bnder - a 6 mm - 1 240 MPa Rm 1 450 MPa This European Standard was approved by CEN on 13 May 2018. 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 standard without any alteration
14、. 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 any other language made by t
15、ranslation 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 Republic, Denmark, Estonia, Fi
16、nland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STA
17、NDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2540:2018 EBS EN 2540:2018EN 2540:
18、2018 (E) 2 Contents Page European foreword 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Requirements . 5 BS EN 2540:2018EN 2540:2018 (E) 3 European foreword This document (EN 2540:2018) has been prepared by the Aerospace and Defence Industries Association of Euro
19、pe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Stan
20、dard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2019, and conflicting national standards shall be withdrawn at the latest by February 2019. Attention is drawn to the possibility that some of the elements o
21、f this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
22、ria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spai
23、n, Sweden, Switzerland, Turkey and United Kingdom. BS EN 2540:2018EN 2540:2018 (E) 4 Introduction This European Standard is part of the series of EN metallic material standards for aerospace applications. The general organization of this series is described in EN 4258. This European Standard has bee
24、n prepared in accordance with EN 4500-005. BS EN 2540:2018EN 2540:2018 (E) 5 1 Scope This European Standard specifies the requirements relating to: Steel X7CrNiAl17-7 (1.4568) Air melted Solution treated and precipitation hardened Sheet and strip a 6 mm 1 240 MPa Rm 1 450 MPa for aerospace applicati
25、ons. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (incl
26、uding any amendments) applies. EN 2043, Aerospace series Metallic materials General requirements for semi-finished product qualification (excluding forgings and castings) EN 4258, Aerospace series Metallic materials General organization of standardization Links between types of EN standards and thei
27、r use EN 4500-005, Aerospace series Metallic materials Rules for drafting and presentation of material standards Part 005: Specific rules for steels EN 4700-001, Aerospace series Steel and heat resisting alloys Wrought products Technical specification Part 001: Plate, sheet and strip 3 Terms and def
28、initions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 4 Requiremen
29、ts See Table 1. BS EN 2540:2018EN 2540:2018 (E) 6 Table 1 Requirements for steel X7CrNiAl17-7 (1.4568) 1 Material designation Steel X7CrNiAl17-7 (1.4568) 2 Chemical composition % Element C Si Mn P S Cr Cu Ni Al Fe min. 16,0 6,50 0,75 Base max. 0,09 1,00 1,00 0,040 0,030 18,0 0,50 7,75 1,50 3 Method
30、of melting Air melted 4.1 Form Sheet and strip 4.2 Method of production Cold rolled 4.3 Limit dimension(s) mm a 6 5 Technical specification EN 4700-001 6.1 Delivery condition Solution treated Heat treatment 1 025 C 1 055 C / t 30 min / AC or OQ 6.2 Delivery condition code W 7 Use condition Solution
31、treated and precipitation hardened Heat treatment Delivery condition 740 C 780 C / t 90 min + cool to 20 C / within 1 h / hold for 30 min + 550 C 580 C / t 90 min / AC Characteristics 8.1 Test sample(s) See EN 4700-001. 8.2 Test piece(s) See EN 4700-001. 8.3 Heat treatment Delivery condition Use con
32、dition 9 Dimensions concerned mm a 5 5 a 6 a 6 10 Thickness of cladding on each face % 11 Direction of test piece See EN 4700-001. 12 T Temperature C Ambient 13 Proof stress Rp0,2 MPa 1 035 14 Strength Rm MPa 1 240 Rm 1 450 15 Elongation A % 5 16 Reduction of area Z % 17 Hardness 229 HV 229 HV 38 HR
33、C 18 Shear strength Rc MPa 19 Bending k 0,5 = 180 1,5 = 180 20 Impact strength 21 C Temperature C 22 Time h 23 Stress a MPa 24 Elongation a % 25 Rupture stress R MPa 26 Elongation at rupture A % 27 Notes (see line 98) BS EN 2540:2018EN 2540:2018 (E) 7 44 External defects See EN 4700-001. 95 Marking
34、inspection See EN 4700-001. 96 Dimensional inspection See EN 4700-001. 98 Notes 99 Typical use BS EN 2540:2018EN 2540:2018 (E) 8 100 Product qualification See EN 2043. Qualification programme to be agreed between manufacturer and purchaser. BS EN 2540:2018This page deliberately left blankThis page d
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