1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4720 Edition P 1 December 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 775 8131 - www.asd-stan.orgICS: Descriptors: ENGL
2、ISH VERSION Aerospace series Steel X4CrNiMo16-5-1 (1.4418) Air melted and electroslag remelted (ESR) Hardened and tempered Bar De 200 mm 1 150 MPa Rm 1 300 MPa Srie arospatiale Acier X4CrNiMo16-5-1 (1.4418) labor lair Tremp et revenu Barres De 200 mm 1 150 MPa Rm 1 300 MPa Luft- und Raumfahrt Stahl
3、X4CrNiMo16-5-1 (1.4418) Lufterschmolzen Gehrtet- und angelassen Stangen De 200 mm 1 150 MPa Rm 1 300 MPa This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the
4、needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or f
5、unctionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN).
6、The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1 December 2012 Comments should be sent within six months after the date of
7、publication to ASD-STAN Metallic Material Domain Copyright 2012 by ASD-STAN prEN 4720:2012 (E) 2 Contents Page Foreword 2 Introduction . 3 1 Scope 4 2 Normative references 4 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Metallic Material Domain. After inquiries
8、 and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4720:2012 (E) 3 Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The ge
9、neral organization of this series is described in EN 4258. This standard has been prepared in accordance with EN 4500-005. prEN 4720:2012 (E) 4 1 Scope This standard specifies the requirements relating to: Steel X4CrNiMo16-5-1 (1.4418) Air melted and electroslag remelted (ESR) Hardened and tempered
10、Bar De 200 mm 1 150 MPa Rm 1 300 MPa for aerospace applications. NOTE Other common designation: AIR: Z 8 CND 17-04. 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 refe
11、rences, the latest edition of the referenced document (including any amendments) applies. EN 2043, Aerospace series Metallic materials General requirements for semi-finished product qualification (excluding forgings and castings) 1)EN 2951, Aerospace series Metallic materials Test method Micrographi
12、c determination of content of non-metallic inclusions 1)EN 4050-4, Aerospace series Test method for metallic materials Ultrasonic inspection of bars, plates, forging stock and forgings Part 4: Acceptance criteria EN 4258, Aerospace series Metallic materials General organization of standardization Li
13、nks between types of EN standards and their use EN 4500-005, Aerospace series Metallic materials Rules for drafting and presentation of material standards Part 005: Specific rules for steelsEN 4700-002, Aerospace series Steel and heat resisting alloys Wrought products Technical specification Part 00
14、2: Bar and sectionAMS 2315, Determination of delta ferrite content 2) 1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). 2) Published as SAE National (US) Society of Automotive Engineers (http:/www.sae.org/). prEN 4720:2012 (E) 5 1 Material designati
15、on Steel X4CrNiMo16-5-1 (1.4418) 2 Chemical composition % Element C Si Mn aP bS bN Cr Mo Ni Fe min. 0,020 15,00 0,80 4,00 Base max. 0,06 0,70 1,50 0,030 0,005 17,00 1,50 6,00 3 Method of melting Air melted and electroslag remelted (ESR) 4.1 Form Bar 4.2 Method of production 4.3 Limit dimension(s) mm
16、 De 200 5 Technical specification EN 4700-002 6.1 Delivery condition Annealed Hardened (direct quenching on hot rolled products) + Tempered Hardened + Tempered Heat treatment 830 C 850 C 1 060 C / AC Tempered 250 C 1 010 C 1 060 C / OQ or WQ c Tempered 375 C 405 C 6.2 Delivery condition code A U 7 U
17、se condition Hardened and tempered Delivery condition Heat treatment Delivery condition 1 010 C 1 060 C / OQor WQ c 375 C 405 C Characteristics 8.1 Test sample(s) See EN 4700-002. See EN 4700-002. 8.2 Test piece(s) See EN 4700-002. See EN 4700-002. 8.3 Heat treatment Annealed Use condition 9 Dimensi
18、ons concerned mm De 200 De 75 De 75 75 De 200 10 Thickness of cladding on each face % 11 Direction of test piece L L LT12 T Temperature C Ambient Ambient Ambient 13 Proof stress Rp0,2MPa 900 900 14 Strength RmMPa 1 150 Rm 1 300 1 150 Rm 1 300 15 Elongation A % 14 14 8 16 Reduction of area Z % 17 Har
19、dness HBW 293 350 HBW 401 350 HBW 401 18 Shear strength RcMPa 19 Bending k 20 Impact strength KV J 100 J at 20 C Notch direction T 60 J at 30 C Notch direction T (see line 98) 100 J at 20 C Notch direction T 60 J at 30 C Notch direction T(see line 98) 50 J at 20 C Notch direction L 20 J at 30 C Notc
20、h direction L(see line 98) 21 C Temperature C 22 Time h 23 Stress aMPa 24 Elongation a % 25 Rupture stress RMPa 26 Elongation at rupture A % 27 Notes (see line 98) a, b, c prEN 4720:2012 (E) 6 30 Microstructure EN 4700-002 1 See AMS 2315.7 The ferrite content shall not exceed 5 %34 Grain size EN 470
21、0-002 7 G 5 or finer 44 External defects (visual) EN 4700-002 50 Cleanliness/inclusion content EN 4700-002(micro cleanness) 1 See EN 2951. 7 Category 461 Internal defects EN 4700-002 1 See EN 4050-2. 7 Class 5 95 Marking inspection EN 4700-002 96 Dimensional inspection EN 4700-002 98 Notes a Where a
22、 more stringent impact strength is required (e.g. 20 J at 40 C direction L and 50 J at 40 C direction T), the maximum Mn content may be increased to 2 % subject to agreement between the customer and the supplier.b For specific welding applications (e.g. high power beam), and after agreement between manufacturer and purchaser, SP should be equal or less than 0,023 %.c Air quenching may be used for De 20 mm. 99 Typical use prEN 4720:2012 (E) 7 100 Product qualification EN 2043 Qualification programme to be agreed between manufacturer and purchaser.
