1、BRITISH STANDARDBS EN 3971:2006Aerospace series Steel FE-PL1507 (40CrMoV12) Consumable electrode remelted Annealed Forging stock a or D u 350 mmThe European Standard EN 3971:2006 has the status of a British StandardICS 49.025.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g
2、53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3971:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007ISBN 978 0 580 50082 4Natio
3、nal forewordThis British Standard was published by BSI. It is the UK implementation of EN 3971:2006.The UK participation in its preparation was entrusted by Technical Committee ACE/61, Metallic materials for aerospace purposes, to Panel ACE/61/-/15, Steels.A list of organizations represented on ACE/
4、61/-/15 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.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publ
5、icationAmd. No. Date CommentsEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3971 December 2006 ICS 49.025.10 English Version Aerospace series - Steel FE-PL1507 (40CrMoV12) - Consumable electrode remelted - Annealed - Forging stock - a or D 350 mm Srie arospatiale - Acier FE-PL1507 (40CrMoV12)
6、- Refondu llectrode consommable - Recuit - Produits destins la forge - a ou D 350 mm Luft- und Raumfahrt - Stahl FE-PL1507 (40CrMoV12) - Mit selbstverzehrender Elektrode umgeschmolzen - Geglht - Schmiedevormaterial - a oder D 350 mm This European Standard was approved by CEN on 18 October 2006. 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 Central Secretariat 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 Central Secretariat has t
9、he same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
10、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved
11、 worldwide for CEN national Members. Ref. No. EN 3971:2006: E2 Foreword This document (EN 3971:2006) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, t
12、his 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 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at th
13、e latest by June 2007, and conflicting national standards shall be withdrawn at the latest by June 2007. Attention is drawn 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 s
14、uch patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland
15、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3971:20063 Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The gener
16、al organization of this series is described in EN 4258. This standard has been prepared in accordance with EN 4500-5. 1 Scope This standard specifies the requirements relating to: Steel FE-PL1507 (40CrMoV12) Consumable electrode remelted Annealed Forging stock a or D 350 mm for aerospace application
17、s. 2 Normative 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. EN 2002-8, Aerospace se
18、ries Metallic materials Test methods Part 8: Micrographic determination of grain size. 1)EN 2003-7, Aerospace series Steel Test methods Part 7: Macrographic test. 1)EN 2043, Aerospace series Metallic materials General requirements for semi-finished product qualification (excluding forgings and casti
19、ngs). 1)EN 2157-2, Aerospace series Steel Forging stock and forgings Technical specification Part 2: Forging stock. EN 2957, Aerospace series Method of preparation of forged samples. 1)EN 4258, Aerospace series Metallic materials General organization of standardization Links between types of EN stan
20、dards and their use. EN 4500-5, Aerospace series Metallic materials Rules for drafting and presentation of material standards Part 5: Specific rules for steels. 1)1) Published as ASD Prestandard at the date of publication of this standard. EN 3971:20064 1 Material designation Steel FE-PL1507 (40CrMo
21、V12) Element C Si Mn P aS Cr Mo Ni SnaV Fe min. 0,35 0,10 0,40 3,00 0,80 0,15 2 Chemical composition % max. 0,43 0,35 0,70 0,015 0,010 3,50 1,10 0,30 0,025 0,25 Base 3 Method of melting Consumable electrode remelted 4.1 Form Forging stock 4.2 Method of production 4.3 Limit dimension(s) mm a or D 350
22、 5 Technical specification EN 2157-2 Delivery condition Annealed 6.1 Heat treatment 6.2 Delivery condition code U Use condition Delivery condition 7 Heat treatment Characteristics 8.1 Test sample(s) See EN 2157-2. Reforged sample in accordance with EN 2957 or cut from forging stock 8.2 Test piece(s)
23、 See EN 2157-2. Heat treated before machining with De 50 mm 8.3 Heat treatment Delivery condition See line 29. 9 Dimensions concerned mm a or D 350 a or D 350 10 Thickness of cladding on each face % 11 Direction of test piece L or LT 12 Temperature C Ambient 13 Proof stress Rp0,2MPa 1 030 14 Strengt
24、h RmMPa 1 250 Rm 1 400 15 Elongation A % 10 16 T Reduction of area Z % 45 17 Hardness 277 HB 375 HB 401 18 Shear strength RcMPa 19 Bending k 20 Impact strength KV 25 J ; Notch direction T b, c21 Temperature C 22 Time h 23 Stress aMPa 24 Elongation a % 25 Rupture stress RMPa 26 C Elongation at ruptur
25、e A % 27 Notes (see line 98) a, b, c EN 3971:20065 29 Reference heat treatment Hardened and tempered 910 C 950 C / t 1 h / OQ + temper 600 C / t 1 h / OQ or AC d34 Grain size 1 EN 2002-8 2 The “capability clause“ applies 3 A transverse slice selected at a convenient stage of manufacture from a locat
26、ion corresponding to the top of the ingot. 4 Reforged sample in accordance with EN 2957 5 See line 29. 7 G 7 44 External defects See EN 2157-2.50 Cleanliness/inclusion content EN 2157-2.(micro-cleanness) 7 Category 3 51 Macrostructure 1 EN 2003-7 2 1 per ingot 3 A transverse slice selected at a conv
27、enient stage of manufacture from a location corresponding to the top of the ingot. 5 Non heat treated 7 Class 1 Freckles: severity A Class 2 White spots: severity A Class 3 Radial segregation: severity A Class 4 Ring pattern: severity B 61 Internal defects See EN 2157-2.7 a or D (mm) Class 250 4 250
28、 3 95 Marking inspection See EN 2157-2. 96 Dimensional inspection See EN 2157-2. 98 Notes aP + Sn 0,025 bValue after blank nitriding: 500 C 10 C / t = 24 h. The “capability clause“ applies. cIZOD is optional test and shall achieve 20 ft.lbf minimum. dActual heat treatment temperature and time shall
29、be reported on the inspection and test report. 99 Typical use Low alloy general purpose steel; suitable for nitriding EN 3971:20066 100 Product qualification See EN 2043. Qualification programme to be agreed between manufacturer and purchaser. EN 3971:2006blankBS EN 3971:2006BSI389 Chiswick High Roa
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