BS EN 3833-2004 pdf download.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.
This BS EN 3833 specifies the characteristics, qualification and acceptance requirements for bolts with MJ
threads in Nl-PH2601, passivated, for aerospace applications.
Classification: 1 550 MPa 1)/650 °C 2)
It is applicable whenever referenced.
2 Normative references
The following referenced documents are indispensaoie br tne application oi mis Uocumeni. ror daied references, only the edition cited applies, For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2859-1. Sampling procedures for inspection by attributes – Part 1: Sampling schemes indexed by acceptable quality limit (AQL) for lot-by-lot inspection
ISO 3452, Non-destructive testing — Penetrant inspection General principles
ISO 4288, Geometrical Product Specifications (GPS) – Surface texture: Profile method – Rules and procedures for the assessment of surface texture
ISO 6508-1. Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B. C, 0, E, F, G,H, K, N. T)
ISO 6892. Metallic materials — Tensile testing at ambient temperature
ISO 7961, Aerospace — Bolts — Test methods
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace
standard parts 3)
ASTM E 112-96, Standard Test Methods for Determining Average Grain Size 4)
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
batch
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 same probability of being chosen
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
performance of the function of a major end item
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
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
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 10 % probability of acceptance
acceptance quality limit (AQL)
a quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance
It is the maximum per cent defective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection can be considered satisfactory as a process average.
4 Quality assurance 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 random 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.
Table 2 indicates the allocation of bolt samples for the inspections and tests.
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 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 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 cx 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 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 purchase order.BS EN 3833-2004 pdf download.