1、 ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 3833 Edition P3 February 2018 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: Descriptors: ENG
2、LISH VERSION Aerospace series Bolts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), passivated Classification: 1 550 MPa (at ambient temperature)/650 C Technical specification Luft- und Raumfahrt Schrauben, MJ-Gewinde, aus hochwarmfester Nickelbasislegierung NI-PH2601 (Inco
3、nel 718), passiviert Klasse: 1 550 MPa (bei Raumtemperatur)/650 C Technische Lieferbedingungen Srie arospatiale Vis filetage MJ, en alliage rsistant chaud base de nickel NI-PH2601 (Inconel 718), passives Classification: 1 550 MPa ( temprature ambiante)/650 C Spcification technique This “Aerospace Se
4、ries“ 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 of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following
5、 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 functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-S
6、TAN, the ASD-STAN prEN 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 CEN national members have then to implement the EN at national level by giving the EN the status of a na
7、tional standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, and its applicability and suitabili
8、ty for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN invites you to send yo
9、ur written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of ASD
10、-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1stFebruary 2018 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain prEN 3833:2018 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Norma
11、tive references 4 3 Terms and definitions . 4 4 Quality assurance 6 5 Requirements . 7 (normative) Passivation treatment for bolts . 23 Annex A(informative) Tensile, creep test and tension fatigue Areas and loads formulae . 24 Annex B(informative) Standard evolution form . 26 Annex CBibliography . 2
12、7 prEN 3833:2018 (E) 3 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 standard has received approval for Publicati
13、on. prEN 3833:2018 (E) 4 1 Scope This European standard specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in NI-PH2601, passivated, for aerospace applications. Classification: 1 550 MPa1)/650 C2). It is applicable whenever referenced. 2 Normative refe
14、rences 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 (including any amendments)
15、 applies. 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 the assessment of surface texture EN ISO 6508-1, Metallic materials Rockwell hardness test Part
16、 1: Test method EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature EN ISO 6892-2, Metallic materials Tensile testing Part 2: Method of test at elevated temperature EN ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests ISO 2859-1, Sampling p
17、rocedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts ISO 7961, Aerospace Bolts Test methods ASTM E112-13, Standard Test Methods for Determining
18、Average Grain Size3)3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 batch quantity of finished parts, of the same type and same diameter, produced from the same material obtained from the same melt, manufactured in the course of the same prod
19、uction cycle, following the same manufacturing route and having undergone all the relevant heat treatments and surface treatments 1) Minimum tensile strength of the material at ambient temperature. 2) Maximum test temperature of the parts. 3) Published by: ASTM National (US) American Society for Tes
20、ting and Materials http:/www.astm.org. prEN 3833:2018 (E) 5 3.2 inspection lot quantity of parts from a single production batch with 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
21、be intercrystalline or transcrystalline in character 3.3.2 seam open surface defect 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 inclusions non-metallic particles originating from the material manufacturing proces
22、s Note 1 to entry: These particles may be isolated or arranged in strings. 3.4 test temperature ambient temperature unless otherwise specified 3.5 simple random sampling taking of n items from a population of N items in such a way that all possible combinations of n items have the same probability o
23、f being chosen 3.6 critical defect 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 performance of the function of a major end item 3.7
24、major defect 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 3.8 minor defect defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or
25、 that is a departure from established specification having little bearing on the effective use or operation of this product prEN 3833:2018 (E) 6 3.9 sampling plan plan according to which one or more samples are taken in order to obtain information and possibly to reach a decision 3.10 Limiting Quali
26、ty LQ10in a sampling plan, the quality limit which corresponds to a specified 10 % probability of acceptance 3.11 Acceptance Quality Limit AQL 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 d
27、efective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection can be considered satisfactory as a process average. 3.12 finished bolt bolt ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the product standard or de
28、finition document 3.13 definition document document specifying all the requirements for finished bolts 4 Quality assurance 4.1 Qualification The product qualification shall be performed to the process as defined in e. g. EN 9133 to achieve a qualification approval from the controlling Certification
29、Authority (CA). Qualification inspections and tests (requirements, methods, numbers of bolts) are specified in Table 1. They shall be carried out on: each type and diameter of bolt; 25 bolts selected from a single inspection lot by simple random sampling. The test programme may possibly be reduced,
30、or the qualification of a bolt be granted without inspection or testing. Any such decision shall be based on the results obtained on similar types and diameters of bolts provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of bolt samples for the insp
31、ections and tests. prEN 3833:2018 (E) 7 4.2 Acceptance 4.2.1 Purpose The purpose of acceptance inspections and tests is to check, as simply as possible, by a method representative of actual use conditions, with the uncertainty inherent to statistical sampling, that the bolts constituting the batch s
32、atisfy the requirements of this standard. 4.2.2 Conditions Acceptance inspections and tests (requirements, methods, numbers of bolts) are specified in Table 1; they shall be carried out on each batch. Bolts from the batch to be tested shall be selected by simple random sampling. Each bolt may be sub
33、mitted to several inspections or tests. If a more stringent inspection is deemed necessary, all or part of the qualification inspections and tests may be performed during the acceptance inspection and testing. In this case, the number of bolts submitted to these inspections and tests is the same as
34、that submitted for qualification inspection and tests. 4.2.3 Responsibility Acceptance inspections and tests shall be carried out by the manufacturer, or under his responsibility. 4.2.4 Inspection and test report A test report showing actual numerical values shall be provided if specified in the pur
35、chase order. 5 Requirements See Table 1. Table 1 Technical requirements and test methods Clause Characteristic Requirement Inspection and test method Q/AaSample size 5.1 Material In accordance with the product standard or definition document Chemical analysis or certificate of compliance issued by t
36、he manufac-turer of the semi-finished product Q A 5.2 Dimensions, tolerances and tolerances of form and position In accordance with the product standard or definition document Standard gauging Q 25 A Table 3 and Table 4 prEN 3833:2018 (E) 8 Clause Characteristic Requirement Inspection and test metho
37、d Q/AaSample size 5.3 Manufacturing 5.3.1 Forging The head of the bolts shall be formed by hot or cold forging. If hot forged, the forging temperature shall be between 1 040 C and 1 080 C and they shall be air cooled. The method of forging shall be indicated. Q The equipment shall ensure a uniform t
38、emperature throughout the batch. The equipment shall be approved. 5.3.2 Heat treatment The heat treatment medium or atmosphere shall not cause any surface contamination except as permitted by 5.5.6. Calibration of the heat treatment equipment shall be confirmed. Q Any scale not removed by subsequent
39、 machining shall be removed by abrasive blasting with an appropriate equipment. Visual examination The headed blanks shall be precipitation heat treated at (720 null 5) C, held at temperature for 8 h null 15 min, furnace cooled at (55 null 5) C per hour to (620 null 5) C, held at 620 C for 8 h null
40、15 min, followed by air cooling or faster. Instead of the 55 C per hour cooling rate to 620 C, parts may be furnace cooled at any rate provided the time at 620 C is adjusted to give a total precipitation time of 18 h min. Examination of the heat treatment specification 5.3.3 Removal of surface conta
41、mination After precipitation 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. See 5.5.6. The amount of material removed shall be as little as prac
42、ticable and shall respect the requirements of 5.5.1. See 5.5.1. 5.3.4 Head to shank fillet After completion of heat treatment and machining, the underhead fillet radius shall be cold rolled to remove all visual signs of machining and to create cold working. This may cause distortion which shall not
43、exceed the values in Figure 1, unless otherwise specified on the product standard or definition document. For parts with compound radii between head and shank (e.g. T head bolts), only the radius that blends with the head shall be cold worked, however it is acceptable for cold work to extend over th
44、e compound radius. The fillet shall not show seams or inclusions (see Table 5). Dimensional check (see 5.2) and visual examination Q 25 A Table 3 and Table 4 5.3.5 Threads Shall be formed by a single rolling process after full heat treatment (see Figure 2). Q 5.3.6 Surface roughness In accordance wi
45、th the product standard or definition document EN ISO 4288 Q 3 Visual examination A Table 3and Table 4 prEN 3833:2018 (E) 9 Clause Characteristic Requirement Inspection and test method Q/AaSample size 5.3.7 Passivation treatment Uncoated finished bolts shall be passivated in accordance with Annex A
46、(normative). EN ISO 9227, neutral salt spray (NSS) test Q 5 After 2 h of salt spray, bolts shall show no evidence of corrosion or staining. Visual examination A 100 % 5.3.8 Surface coating In accordance with the product standard or definition document See applicable coating standard. Q 3 A Table 3 a
47、nd Table 4 5.4 Mechanical properties A test sample shall be selected from each diameter of bar/wire taken from each cast, and shall be heat treated together with a production batch of bolts. The sample selected shall be sufficient to provide tensile and stress rupture test specimens. The test specim
48、ens shall meet the mechanical properties required by the material standard. 5.4.1 Tensile strength The finished bolts shall withstand the minimum tensile loads specified in Table 6. Externally wrenched bolts shall not fail in the head to shank area when subjected to the tensile test. Tensile tests a
49、re not applicable to the following: a) protruding head bolts of grip length 10). b A slight irregularity in the form of the crests in relation to the basic profile is acceptable (see Figure 6). prEN 3833:2018 (E) 16 Table 6 Minimum tensile and stress rupture loads Thread Tensile test load aat ambient temperature Tensile test load for protruding head boltsaCreep strength for protruding head boltsaDiameter Pitch Protruding head Countersunk head normal head reduced head no recess recessed 650 C 650
