1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3833 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 July 1997 and will supersede EN 3833:2004 Descriptors: Aircraft industry, fastener, MJ-threads, nickel alloy, surface treatment, bolt, procurement, specification, characteristic, mechanical properties, test, mechanical test, quality assurance, qualification ENGLISH VERSION Aerospace series B
3、olts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), passivated Classification: 1 550 MPa (at ambient temperature) / 650 C Technical specification Srie arospatiale Vis filetage MJ, en alliage rsistant chaud base de nickel NI-PH2601 (Inconel 718), passives Classification : 1
4、 550 MPa ( temprature ambiante) / 650 C Spcification technique Luft- und Raumfahrt Schrauben, MJ-Gewinde, aus hochwarmfester Nickelbasislegierung NI-PH2601 (Inconel 718), passiviert Klasse: 1 550 MPa (bei Raumtemperatur) / 650 C Technische Lieferbedingungen This “Aerospace Series“ Prestandard has be
5、en 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 member comments. Subseq
6、uent 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-STAN, it will be submitte
7、d 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 national standard and by withdrawing any
8、national standards conflicting with the EN. Edition approved for publication 1st September 2015 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain Copyright 2015 by ASD-STAN prEN 3833:2015 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative referen
9、ces 3 3 Terms and definitions . 4 4 Quality assurance 5 5 Requirements . 6 Annex A (normative) Passivation treatment for bolts26 A.1 Pre-treatment26 A.2 Passivation .26 A.3 Water rinse .26 A.4 Finish 26 Annex B (informative) Tensile, stress rupture and tension fatigue Areas and loads formulae .27 B.
10、1 Cross sectional area values .27 B.2 Formulae .27 Annex C (informative) Standard evolution form .29 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-S
11、TANs General Process Manual, this standard has received approval for Publication. prEN 3833:2015 (E) 3 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for bolts with MJ threads in NI-PH2601, passivated, for aerospace applications. Classification: 1 550
12、MPa 1) /650 C 2) It is applicable whenever referenced. 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 references, only the edition cited applies. For undated references, the latest
13、edition of the referenced document (including any amendments) applies. EN 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 Specif
14、ications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at
15、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 procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance qualit
16、y 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 Average Grain Size 3). 1) Minimum tensile strength of the material at ambient temperature 2)
17、 Maximum test temperature of the parts 3) Published by: ASTM National (US) American Society for Testing and Materials. http:/www.astm.org prEN 3833:2015 (E) 4 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 batch quantity of finished parts, o
18、f the same type and same diameter, produced from the same material obtained from the same melt, manufactured in the course of the same production cycle, following the same manufacturing route and having undergone all the relevant heat treatments and surface treatments 3.2 inspection lot quantity of
19、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 be intercrystalline or transcrystalline in character 3.3.2 seam open surface defect 3.3.3 l
20、ap 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 process Note 1 to entry: These particles may be isolated or arranged in strings. 3.4 test tempera
21、ture 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 same probability of being chosen 3.6 critical defect a defect that, according to judgement and experience
22、, 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 major defect a defect other than critical, that is likely to result in a failure or t
23、o reduce materially the usability of the considered product for its intended purpose prEN 3833:2015 (E) 5 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 l
24、ittle bearing on the effective use or operation of this product 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 3.10 Limiting Quality LQ10 in a sampling plan, the quality limit which corresponds to a specified
25、10 % probability of acceptance 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 purp
26、oses of sampling inspection can be considered satisfactory as a process average. 3.12 finished bolt a bolt ready for use, inclusive of any possible treatments and/or surface coatings, as specified in the product standard or definition document 3.13 definition document document specifying all the req
27、uirements for finished bolts 4 Quality assurance 4.1 Qualification EN 9133 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 ra
28、ndom sampling. The test programme may possibly be reduced, 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. Ta
29、ble 2 indicates the allocation of bolt samples for the inspections and tests. prEN 3833:2015 (E) 6 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 st
30、atistical sampling, that the bolts constituting the batch satisfy 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
31、be selected by simple random sampling. Each bolt may be submitted 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 bol
32、ts submitted to these inspections and tests is the same as 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
33、 numerical values shall be provided if specified in the purchase order. 5 Requirements See Table 1. prEN 3833:2015 (E) 7 Table 1 Technical requirements and test methods (1 of 6) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.1 Material In accordance with the product
34、 standard or definition document Chemical analysis or certificate of compliance issued by the manufacturer 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 Tables 3 a
35、nd 4 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 equipment shall ensure a uniform temperature throughout the batch. The method of forging sh
36、all be indicated. The equipment shall be approved. Q 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 machining sh
37、all be removed by abrasive blasting with an appropriate equipment. Visual examination The headed blanks shall be precipitation heat treated at (720 5) C, held at temperature for 8 h 15 min, furnace cooled at (55 5) C per hour to (620 5) C, held at 620 C for 8 h 15 min, followed by air cooling or fas
38、ter. 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 prEN 3833:2015 (E) 8 Table 1 Technical requirements and test methods
39、 (2 of 6) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.3.3 Removal of surface contamination 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
40、 penetration; b) to obtain a clean smooth surface. See 5.5.6. The amount of material removed (see Figure 1) shall be as little as practicable 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 radi
41、us shall be cold rolled to remove all visual signs of machining and to create cold working. This may cause distortion which shall not exceed the values in Figure 2, unless otherwise specified on the product standard or definition document. For parts with compound radii between head and shank (e.g. T
42、 head bolts), only the radius that blends with the head shall be cold worked, however it is acceptable for cold work to extend over the compound radius. The fillet shall not show seams or inclusions (see Table 6). Dimensional check (see 5.2) and visual examination Q 25 A Tables 3 and 4 5.3.5 Threads
43、 Shall be formed by a single rolling process after full heat treatment (see Figure 3). Q 5.3.6 Surface roughness In accordance with the product standard or definition document EN ISO 4288 Q 3 Visual examination A Tables 3 and 4 5.3.7 Passivation treatment Uncoated finished bolts shall be passivated
44、in accordance with Annex A (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 coatin
45、g standard. Q 3 A Tables 3 and 4 prEN 3833:2015 (E) 9 Table 1 Technical requirements and test methods (3 of 6) Clause Characteristic Requirement Inspection and test method Q/A a Sample size 5.4 Mechanical properties A test sample shall be selected from each diameter of bar/wire taken from each cast,
46、 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 specimens shall meet the mechanical properties required by the material standard. 5.4.1 Tensile strength The finished bolts sha
47、ll withstand the minimum tensile loads specified in Table 7. Externally wrenched bolts shall not fail in the head to shank area when subjected to the tensile test. Tensile tests are not applicable to the following: a) protruding head bolts of grip length twice the nominal shank diameter; b) counters
48、unk head bolts of grip length 2,5 the nominal shank diameter; c) threaded to head bolts of overall length 3 the nominal shank diameter or bolts having an overall length 18 mm; d) bolts of diameters of 4 mm. In such cases acceptability shall be based on the results from test bars of the same material
49、 heat treated within the same process cycle. 5.4.1.1 at ambient temperature ISO 7961 for bolts Q 4 EN ISO 6892-1 for test specimens A Tables 8 or 9 5.4.1.2 at elevated temperature (650 5) C ISO 7961 for bolts Q 4 EN ISO 6892-2 for test specimens prEN 3833:2015 (E) 10 Table 1 Technical requirements and test methods (4 of 6) Clause Characteristic Requirement Inspection and test metho
