oSIST prEN 3833:2026

SLOVENSKI STANDARD
01-januar-2026
Aeronavtika - Sorniki, navoj MJ, iz toplotnoodporne zlitine na nikljevi osnovi NI-
PH2601 (Inconel 718), pasivirane - Klasifikacija 1550 MPa (pri okoljski
temperaturi)/650 °C - Tehnična specifikacija
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 - Schraube, MJ-Gewinde, aus hochwarmfester Nickelbasislegierung
NI-PH2601 (Inconel 718), passiviert - Klasse: 1 550 MPa (bei Raumtemperatur)/650 °C –
Technische Lieferbedingungen
Série aérospatiale - Vis à filetage MJ, en alliage résistant à chaud à base de nickel NI-
PH2601 (Inconel 718), passivées - Classification : 1 550 MPa (à température ambiante) /
650 °C - Spécification technique
Ta slovenski standard je istoveten z: prEN 3833
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 49.030.20 Will supersede EN 3833:2019
English 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 - Schraube, MJ-Gewinde, aus
hochwarmfester Nickelbasislegierung NI-PH2601
(Inconel 718), passiviert - Klasse: 1 550 MPa (bei
Raumtemperatur)/650 °C - Technische
Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3833:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Quality assurance . 6
4.1 Qualification . 6
4.2 Acceptance. 7
4.2.1 Purpose . 7
4.2.2 Conditions . 7
4.2.3 Responsibility . 7
4.2.4 Inspection and test report . 7
5 Requirements . 7
Annex A (informative) Tensile, creep test and tension fatigue — Areas and loads formulae . 22
Bibliography . 24
European foreword
This document (prEN 3833:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 3833:2019.
This document includes the following significant technical changes with respect to EN 3833:2019:
— 4.1 “Qualification” updated;
— 4.2.2 “Conditions” updated;
— Table 1, “Technical requirements and test methods” updated;
— Table 2, “Allocation of qualification testing requirements” updated;
— Annex A, “Passivation treatment for bolts” deleted.
1 Scope
This document specifies the characteristics, qualification and acceptance requirements for bolts with MJ
threads in NI-PH2601, passivated, for aerospace applications.
1 2
Classification: 1 550 MPa /650 °C .
It is applicable whenever referenced.
2 Normative references
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) applies.
EN ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles (ISO 3452-1)
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 6892-2, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature
(ISO 6892-2)
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 7961, Aerospace — Bolts — Test methods
ASTM E112, Standard Test Methods for Determining Average Grain Size
NASM 1312-8, Fastener test methods, method 8, tensile strength
NASM 1312-11, Fastener test methods, method 11, tension fatigue
SAE AMS2774, Heat Treatment, Nickel Alloy and Cobalt Alloy Parts
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/

Minimum tensile strength of the material at ambient temperature.
Maximum test temperature of the parts.
Published by American Society for Testing and Materials (ASTM International), available at:
https://www.astm.org/.
Published by Aerospace Industries Association (AIA), available at: https://www.aia-aerospace.org/.
Published by Society of Automotive Engineers (SAE), available at: https://www.sae.org/.
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 production cycle, following the
same manufacturing route and having undergone all the relevant heat treatments and surface treatments
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 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 process
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 of 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
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 that is a departure from established specification having little bearing on the effective use or
operation of this product
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 Quality
LQ
quality limit which, in a sampling plan, 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 defective (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 definition document
3.13
definition document
document specifying all the requirements for finished bolts
4 Quality assurance
4.1 Qualification
The manufacturer’s operations shall be an approved production organization for aerospace products and
shall demonstrate that it has implemented and is able to maintain a quality management system (e.g. in
accordance with EN 9100 or an equivalent aerospace accepted and established quality management
system).
The qualification procedure for aerospace standard products (e.g. in accordance with EN 9133 or an
equivalent aerospace accepted and established qualification procedure) shall be used and documented
in accordance with the specified tests.
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 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.
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 document.
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.
4.2.3 Responsibility
Acceptance inspections and tests shall be carried out, e.g. by a manufacturer.
4.2.4 Inspection and test report
A test report showing actual numerical values shall be provided if specified in the purchase order.
5 Requirements
Requirements shall be in accordance with Table 1.
Table 1 — Technical requirements and test methods
a
Clause Characteristic Requirement Inspection Q/A Sample
and test size
method
5.1 Material In accordance with the product standard or Chemical Q
definition document analysis or
A
certificate of
compliance
issued by the
manufacturer
of the semi-
finished
product
5.2 Dimensions, In accordance with the product standard or Standard Q 25
tolerances and definition document gauging
A Table 3
tolerances of form
and position
5.3 Manufacturing
5.3.1 Forging The head of the bolts shall be formed by hot or cold The method of Q
forging. If hot forged, the forging temperature shall forging (hot or

be between 1 040 °C and 1 080 °C and they shall be cold) shall be
air cooled. indicated.
The equipment shall ensure a uniform temperature
throughout the batch.
5.3.2 Heat treatment Heat treatment shall be performed in accordance  Q
with SAE AMS2774, however, alternative heat

treatment process parameters can be established
as long as all mechanical properties are achieved.
5.3.3 Head to shank After completion of heat treatment and machining, Dimensional Q 25
fillet the underhead fillet radius shall be cold rolled to check (see 5.2)
A Table 3
remove all visual signs of machining and to create and visual
cold working. examination
This may cause distortion which shall not 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 the compound radius.
The fillet shall not show seams or inclusions
(see Table 4).
5.3.4 Threads Shall be formed by a single rolling process after full  Q
heat treatment (see Figure 2).

5.3.5 Surface In accordance with the product standard or  Q 3
roughness definition document
A Table 3
5.3.6 Surface coating In accordance with the product standard or In accordance
definition document with applicable

coating
standard.
5.4 Mechanical Mechanical tensile test EN ISO 6892-1 Q/A 5/Table 6,
properties Column B
a
Clause Characteristic Requirement Inspection Q/A Sample
and test size
method
5.4.1 Tensile strength The finished bolts shall withstand the minimum NASM 1312–8 Q/A Table 7
tensile loads specified in Table 5.
Externally wrenched bolts shall
...