1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3302 Edition P 2 September 2015 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: 49.030.20 Supersedes edition
2、 P 1 of April 1989 and will supersede EN 3302:2007 Descriptors: ENGLISH VERSION Aerospace series Bolts in heat resisting steel FE-PM1708 (FV535) Classification: 1 000 MPa / 550 C Technical specification Srie arospatiale Vis en acier rsistant chaud FE-PM1708 (FV535) Classification : 1 000 MPa / 550 C
3、 Spcification technique Luft- und Raumfahrt Schrauben aus hochwarmfestem Stahl FE-PM1708 (FV535) Klasse: 1 000 MPa / 550 C Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Euro
4、pe - Standardization). It is published for the 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
5、interchangeability is affected, physically or functionally, 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
6、transformation to full European Standard (EN). 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 1st September 2015 Comments s
7、hould be sent within six months after the date of publication to ASD-STAN Mechanical Domain Copyright 2015 by ASD-STAN prEN 3302:2015 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions . 4 4 Certification and quality assurance . 6 5 Technical requirements and t
8、est methods . 7 Annex A (informative) Standard evolution form. 24 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this s
9、tandard has received approval for Publication. prEN 3302:2015 (E) 3 1 Scope This standard specifies the technical, qualification and quality assurance requirements for bolts in material FE-PM1708 (FV535) of tensile strength class 1 000 MPa at room temperature, maximum test temperature of material 55
10、0 C. Primarily for aerospace applications it is applicable to such bolts when referenced on the product standard or drawing. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated reference
11、s, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2493 1), Aerospace series Heat resisting steel FE-PM38 1 000 MPa Rm 1 140 MPa Bars 2) EN 4244, Aerospace series Heat resisting alloy FE-PM1708 Vacuum arc re
12、melted Hardened and tempered Bar a or D 200 mm 1 000 MPa Rm 1 140 MPa 2) EN 4245, Aerospace series Heat resisting alloy FE-PM1708 Vacuum arc remelted As forged Forging stock De 300 mm 2) EN 9100, Aerospace series Quality Management Systems Requirements for Aviation, Space and Defence Organizations E
13、N 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN ISO 3452-1, Non-destructive testing Penetrant testing Part 1: General principles EN ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for
14、the assessment of surface texture ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 3534:1977, Statistics Vocabulary and symbols ISO 6508-1, Metallic materials Rockwell hardness test Part 1: T
15、est method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 9000, Quality management systems Fundamentals and vocabulary TR 3040-1, Aerospace series Quality Assurance EN aerospace products Part 1: List of approved manufacturers3) 1) Inactive for new designation, see EN 4244 and EN 4245. 2) Published as
16、ASD-STAN Prestandard at the date of publication of this standard. http:/www.asd-stan.org/ 3) Published as ASD-STAN Technical Report at the date of publication of this standard. http:/www.asd-stan.org/ prEN 3302:2015 (E) 4 3 Terms and definitions For the purposes of this document, the following terms
17、 and definitions apply. 3.1 production batch quantity of finished parts fabricated by the same process from a single material cast (single heat of alloy), having the same basic part number and diameter, heat treated together to the same specified condition and produced as one continuous run 3.2 insp
18、ection lot quantity of parts from a single production batch of the same part number which completely defines the part 3.3 Surface discontinuities 3.3.1 crack rupture in the material which may extend in any direction and which may be intercrystalline or transcrystallyne in character 3.3.2 seam longit
19、udinal surface defect in the form of an unwelded open fold in the material 3.3.3 lap surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface 3.3.4 inclusion non-metallic particles originating from the material making process Note 1 to entry
20、: They may exist as discrete particles or strings of particles extending longitudinally. 3.4 test temperature ambient temperature, unless otherwise specified 3.5 simple random sampling the taking of n items from a population of N items in such a way that all possible combinations of n items have the
21、 same probability of being chosen SOURCE: ISO 3534, see definition 3.6 critical defect a defect that according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining, or depending upon the considered product, or that is likely to prevent
22、 performance of the function of a major end item SOURCE: ISO 3534, see definition prEN 3302:2015 (E) 5 3.7 major defect a defect other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its intended purpose SOURCE: ISO 3534, see d
23、efinition 3.8 minor defect a defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or that is a departure from established specification having little bearing on the effective use or operation of this product SOURCE: ISO 3534, see definition
24、 3.9 sampling plan a plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision SOURCE: ISO 3534, see definition 3.10 Limiting Quality LQ10 in a sampling plan, a quality limit which corresponds to a specified and relatively low probability o
25、f acceptance in this case 10 % probability of acceptance Note 1 to entry: It is the limiting lot quality characteristic that a lot of this quality would occur. Note 2 to entry: When expressed as a per cent defective, it may be referred to as a lot tolerance per cent defective. SOURCE: ISO 3534, see
26、definition 3.11 Acceptance Quality Limit AQL a quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance Note 1 to entry: It is the maximum per cent defective (or the maximum number of defects per hundred units) that, for purposes of sampling ins
27、pection, can be considered satisfactory as a process average. SOURCE: ISO 3534, see definition 3.12 finished bolt a bolt ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the dimensional standard or definition document 3.13 definition document document spec
28、ifying all the requirements for bolts i.e. metallurgical, geometrical and dimensional, functional (strength and temperature classes). prEN 3302:2015 (E) 6 4 Certification and quality assurance 4.1 Qualification 4.1.1 Purpose The purpose of qualification tests is to ensure that the bolt design and bo
29、lt manufacturing conditions allow the bolt to comply with the requirements of this standard. 4.1.2 Conditions The qualification tests summarized in Table 3 shall be performed on each type and diameter of bolt. Proposed changes in manufacturing source or procedure shall be subject to the requirements
30、 of EN 9133. 25 bolts selected from a single inspection lot by simple random sampling shall be subjected to the qualification tests. The number of bolts to be subjected to each test as well as the method(s) to be used is specified in Table 1. The tests to be applied to each bolt are shown in Table 4
31、. The test programme may possibly be reduced, this decision will be based on the comparison of results obtained from parts of similar design, size and manufacturing conditions. All or part of these tests may also be performed for production acceptance, when a reinforced inspection seems to be necess
32、ary, or to survey bolts that have not proved satisfactory in use. In that case, the sample to be subjected to these tests is the same as that used for production acceptance tests. 4.1.3 Qualification test requirements and procedures The qualification test requirements and procedures shall be to the
33、requirements of EN 9133. 4.1.4 Qualified manufacturers A list of qualified manufacturers for specific standard parts is listed in TR 3040-1. 4.2 Acceptance 4.2.1 Purpose The purpose of acceptance tests is to check, as simply as possible, by a method representative of actual use conditions, with the
34、uncertainty inherent to statistical sampling, that the bolts constituting the batch satisfy the requirements of this standard. 4.2.2 Conditions Acceptance tests are summarized in Table 3. They shall be performed on each batch. Table 1 specifies, the test method and sampling plan to be used for each
35、test. Bolts from the batch to be tested shall be selected by simple random sampling. Each bolt may be submitted to several tests. The bolts to be subjected to destructive tests may be those on which non-destructive tests have been performed. prEN 3302:2015 (E) 7 4.3 Quality system certification 4.3.
36、1 Purpose The purpose of quality system certification is to ensure that the manufacturer has demonstrated the acceptability of his quality system and his ability for continuing production of parts to this standard, to the required limit of quality. 4.3.2 Requirements and procedure The requirements a
37、nd procedures for quality system certification shall be to the requirements of ISO 9000 and EN 9100. 4.4 Responsibility for inspection and tests The manufacturer is responsible for the performance of all inspection and test requirements as specified herein. Each manufacturer will use their own or ex
38、ceptionally, any other facilities approved in accordance with 4.1 and 4.2 for the implementation of these inspection and test requirements. 4.5 Inspection and test report A test report showing actual numerical values shall be provided at the purchasers option as part of the terms of the purchase ord
39、er. 5 Technical requirements and test methods Table 1 Technical requirements and test methods (1 of 7) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.1 Material Material FE-PM1708 to specification EN 2493 supplied by an approved source: shall be used for the manufac
40、ture of bolts to this standard. As stated in the material specification. 5.2 Dimensions, tolerances of form and position, threads and quality Q 25 A Tables 6 and 7 5.2.1 Dimensions The dimensions of the finished bolts shall conform to the product standard or definition document. All dimensions shall
41、 be controlled by an approved system of gauging. 5.2.2 Tolerances of form and position Tolerances of form and position shall conform to the product standard or definition document. Tolerances of form and position shall be controlled by an approved system of gauging. 5.2.3 Threads Threads shall confo
42、rm to the product standard or definition document. Threads shall be gauged by an approved system of gauging. prEN 3302:2015 (E) 8 Table 1 (2 of 7) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.3 Manufacturing 5.3.1 Forging The heads of the bolts shall be formed by
43、hot or cold forging. If hot forged the forging temperature shall not exceed 1 170 C. The method of forging shall be approved. The heating equipment for forging shall be of a type which ensures a consistent temperature throughout the batch. 5.3.2 Heat treatment The heat treatment medium or atmosphere
44、 shall not cause any surface contamination except as permitted by 5.5.6. The heat treatment equipment shall be approved. Any scale which will not be removed by subsequent machining shall be removed by abrasive blasting. The equipment for abrasive blasting shall be approved. 5.3.2.1 Harden and temper
45、 heat treatment The headed blanks shall be pre-heated to 650 C/700 C, then heated to (1 170 10) C, followed by oil or fast gas quench. The headed and hardened blanks shall then be tempered at (610 5) C for 2 hrs to 5 hrs and air cooled, followed by 620 C/ 650 C for 2 hrs to 5 hrs and air cooled. 5.3
46、.3 Removal of surface contamination After all heat treatment the headed blanks shall have all the shank and bearing surface of the head machined: a) For the removal of all surface contamination and oxide penetration; b) To obtain a clean smooth surface. The amount of material removed (see Figure 1)
47、shall be as little as practicable and shall respect the requirements of 5.5.1. See 5.5.1. prEN 3302:2015 (E) 9 Table 1 (3 of 7) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.3.4 Head to shank fillet After completion of hardening, double tempering and machining. The
48、 underhead radius shall be cold rolled sufficiently to remove all evidence of machining. Cold rolling the head to shank fillet radius may cause distortion of the fillet area. Any such distortion shall be in accordance with the requirements of Figure 2 unless otherwise specified on the bolt standard
49、or definition document. Dimensional check (see 5.5.2) and visual examination. Q 25 A Tables 6 and 7 For parts with compound radii between head and shank, cold work only the radius that blends with the head, however it is acceptable for cold work to extend over the compound radius. The fillet shall not show evidence of seams or inclusions. See 5.5.7.1. 5.3.5 Threads Threads s
