1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4721 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 900 MPa Rm 1 050 MPa Srie arospatiale Acier X4CrNiMo16-5-1 (1.4418) labor lair Tremp et revenu Barres De 200 mm 900 MPa Rm 1 050 MPa Luft- und Raumfahrt Stahl X4Cr
3、NiMo16-5-1 (1.4418) Lufterschmolzen Gehrtet- und angelassen Stangen De 200 mm 900 MPa Rm 1 050 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 needs
4、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 functio
5、nally, 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). The CE
6、N 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 public
7、ation to ASD-STAN Metallic Material Domain Copyright 2012 by ASD-STAN prEN 4721:2012 (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 and v
8、otes 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 4721:2012 (E) 3 Introduction This standard is part of the series of EN metallic material standards for aerospace applications. The general
9、organization of this series is described in EN 4258. This standard has been prepared in accordance with EN 4500-005. prEN 4721:2012 (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 Bar De
10、 200 mm 900 MPa Rm 1 050 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 references,
11、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 Micrographic determ
12、ination 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 Links betw
13、een 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 002: Bar a
14、nd sectionEN ISO 643, Steels Micrographic determination of the apparent grain size (ISO 643:2003) AMS 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 Auto
15、motive Engineers (http:/www.sae.org/). prEN 4721:2012 (E) 5 1 Material designation Steel X4CrNiMo16-5-1 (1.4418) 2 Chemical composition % Element C Si Mn P aS aN 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
16、 remelted (ESR) 4.1 Form Bar 4.2 Method of production 4.3 Limit dimension(s) mm De 200 mm 5 Technical specification EN 4700-002 6.1 Delivery condition Annealed Hardened and tempered Heat treatment 1 010 C 1 060 C / OQ or WQ b Tempered 580 C 610 C 6.2 Delivery condition code A U 7 Use condition Harde
17、ned and tempered Delivery condition Heat treatment 1 010 C 1 060 C / OQ or WQ b Tempered 580 C 610 C Characteristics 8.1 Test sample(s) 8.2 Test piece(s) 8.3 Heat treatment Delivery condition Use condition 9 Dimensions concerned mm De 200 De 75 75 De 200 10 Thickness of cladding on each face % 11 Di
18、rection of test piece L LT 12 T Temperature C Ambient Ambient Ambient 13 Proof stress Rp0,2MPa 700 700 14 Strength RmMPa 900 Rm 1 050 900 Rm 1 050 15 Elongation A % 16 12 16 Reduction of area Z % 17 Hardness HBW 293 269 HBW 331 269 HBW 331 18 Shear strength RcMPa 19 Bending k 20 Impact strength KV J
19、 120 J at 20 C Notch direction T 70 J at 40 C Notch direction T 60 J at 20 C Notch direction L 35 J at 40 C Notch direction L 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, bprEN 4721:2012 (E) 6 30 Microstru
20、cture EN 4700-002 1 See AMS 2315.7 The ferrite content shall not exceed 5 %34 Grain size EN 4700-002 1 See EN ISO 643. 7 G 5 or finer 44 External defects 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 405
21、0-4. 7 Class 5 95 Marking inspection EN 4700-002 96 Dimensional inspection EN 4700-002 98 Notes aFor specific welding applications (e.g. high power beam), and after agreement between manufacturer and purchaser, S+P should be inferior or equal to 0,023 %. bAir quenching may be used for De 20 mm. 99 Typical use prEN 4721:2012 (E) 7 100 Product qualification EN 2043 Qualification programme to be agreed between manufacturer and purchaser.
