ISO/DIS 17779

Brazing -- Specification and qualification of brazing procedures for metallic materials

Brasage fort -- Descriptif et qualification d'un mode opératoire de brassage fort pour les matériaux métalliques

General Information

• Status: Published
• ICS: 25.160.01 - Welding, brazing and soldering in general
• Technical Committee: ISO/TC 44/SC 11 - Qualification requirements for welding and allied processes personnel
• Drafting Committee: ISO/TC 44/SC 11/WG 3 - Brazing qualification
• Current Stage: 4099 - Full report circulated: DIS approved for registration as FDIS
• Start Date: 09-Dec-2020

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 17779
ISO/TC 44/SC 11
Brazing — Specification and
Secretariat: ANSI
qualification of brazing procedures for
Voting begins on:
2021­01­28 metallic materials
Voting terminates on:
Brasage fort — Descriptif et qualification d'un mode opératoire de
2021­03­25
brassage fort pour les matériaux métalliques
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 17779:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
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ISO/FDIS 17779:2021(E)
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© ISO 2021

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ii © ISO 2021 – All rights reserved
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ISO/FDIS 17779:2021(E)
Contents  Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1  Scope ................................................................................................................................................................................................................................. 1

2  Normative references ...................................................................................................................................................................................... 1

3  Terms and definitions ..................................................................................................................................................................................... 2

4  Preliminary brazing procedure specification (pBPS).................................................................................................... 3

5  Brazing procedure test ................................................................................................................................................................................... 3

6  Test piece ...................................................................................................................................................................................................................... 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 Shape and dimensions of test pieces ................................................................................................................................... 3

6.3 Brazing of test pieces ......................................................................................................................................................................... 4

7  Examination and testing ............................................................................................................................................................................... 4

7.1 Extent of testing ..................................................................................................................................................................................... 4

7.2 Test specimens ........................................................................................................................................................................................ 4

7.3 Non­destructive testing ................................................................................................................................................................... 5

7.4 Destructive testing ............................................................................................................................................................................... 5

7.4.1 General...................................................................................................................................................................................... 5

7.4.2 Bend testing ......................................................................................................................................................................... 5

7.4.3 Peel testing ............................................................................................................................................................................ 5

7.4.4 Shear testing ........................................................................................................................................................................ 5

7.4.5 Transverse tensile testing ........................................................................................................................................ 5

7.5 Acceptance levels .................................................................................................................................................................................. 6

7.6 Re­testing ..................................................................................................................................................................................................... 6

8  Essential variables and range of qualification ...................................................................................................................... 6

8.1 General ........................................................................................................................................................................................................... 6

8.2 Brazing process ...................................................................................................................................................................................... 6

8.3 Product type .............................................................................................................................................................................................. 6

8.4 Type of joint ............................................................................................................................................................................................... 7

8.5 Branch connection ............................................................................................................................................................................... 7

8.6 Parent material group(s) ................................................................................................................................................................ 7

8.7 Filler metals, flux and brazing filler application ........................................................................................................ 8

8.8 Dimensions ................................................................................................................................................................................................. 8

8.9 Filler metal flow direction ............................................................................................................................................................. 8

8.10 Post braze heat treatment ............................................................................................................................................................. 9

8.11 Related to the manufacturer ....................................................................................................................................................... 9

9  Brazing procedure qualification record (BPQR) ................................................................................................................. 9

10  Brazing procedure specification (BPS) ......................................................................................................................................... 9

Annex A (informative) Quality requirements for brazing ...........................................................................................................11

Annex B (informative) Brazing procedure specification (BPS) .............................................................................................12

Annex C (informative) Examples of test pieces .......................................................................................................................................13

Annex D (informative) Brazing procedure qualification record (BPQR) .....................................................................15

Annex E (normative) Material grouping system....................................................................................................................................16

Bibliography .............................................................................................................................................................................................................................18

© ISO 2021 – All rights reserved iii
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ISO/FDIS 17779:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non­governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes

Subcommittee SC 11, Qualification requirements for welding and allied processes personnel.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.

Official interpretations of ISO/TC 44 documents, where they exist, are available from this page: https://

committee .iso .org/ sites/ tc44/ home/ interpretation .html.
iv © ISO 2021 – All rights reserved
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ISO/FDIS 17779:2021(E)
Introduction

The purpose of this document is to provide a general set of rules for brazing procedure qualification

independent of product or application.

All new brazing procedure tests are to be carried out in accordance with this document from the date of

its issue. However, this document does not invalidate previous brazing procedure tests made to former

standards or specifications.

Where additional tests need to be carried out to make the qualification technically equivalent, it is only

necessary to perform the additional tests on a test piece which should be made in accordance with this

document.
© ISO 2021 – All rights reserved v
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 17779:2021(E)
Brazing — Specification and qualification of brazing
procedures for metallic materials
1  Scope

This document specifies requirements for the specification and qualification of brazing procedures for

brazing of metallic materials.

This document specifies requirements for brazing of the test piece, testing of the test specimen,

essential variables and their range of qualification, acceptance criteria, brazing procedure qualification

record (BPQR) and brazing procedure specification (BPS).

This document gives provisions on general quality requirements for brazing (see Annex A).

This document does not cover testing of residual stresses, corrosion resistance and impact properties.

This document applies to the following brazing processes in accordance with ISO 857­2 and ISO 4063

with local and global heating:
— 911 Infrared brazing;
— 912 Flame brazing, torch brazing;
— 913 Laser beam brazing;
— 914 Electron beam brazing;
— 916 Induction brazing;
— 918 Resistance brazing;
— 919 Diffusion brazing;
— 921 Furnace brazing;
— 922 Vacuum brazing;
— 923 Dip­bath brazing;
— 924 Salt­bath brazing;
— 925 Flux bath brazing;
— 926 Immersion brazing;
— 972 Arc weld brazing.
The principles of this document can be applied to brazing of other materials.

This document does not apply to brazing for aerospace applications covered by ISO 11745.

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.

ISO 4063, Welding and allied processes — Nomenclature of processes and reference numbers

© ISO 2021 – All rights reserved 1
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ISO/FDIS 17779:2021(E)
ISO 13585, Brazing – Qualification test of brazers and brazing operators
ISO 17672, Brazing — Filler metals
ISO 18279, Brazing — Imperfections in brazed joints

ISO 18496, Brazing — Fluxes for brazing — Classification and technical delivery conditions

EN 12797, Brazing – Destructive tests of brazed joints
EN 12799, Brazing – Non-destructive examination of brazed joints
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
brazing
joining process using filler metal with a liquidus temperature above 450 °C
[SOURCE: ISO 857­2:2005, 3.1.2.]
3.2
brazing procedure specification
BPS

document that has been qualified and provides the required variables of the brazing procedure to

ensure repeatability during production brazing
3.3
preliminary brazing procedure specification
pBPS

document containing the required variables of the brazing procedure which is not yet qualified

3.4
brazing procedure qualification record
BPQR

record comprising all necessary data from qualification of a preliminary brazing procedure

specification (3.3).
3.5
manufacturer

workshop or site or both which is (are) under the same technical and quality management

3.6
examiner
person who has been appointed to verify compliance with the applicable standard

Note 1 to entry: In certain cases, an external independent examiner can be required.

[SOURCE: ISO/TR 25901­1:2016, 2.5.29]
3.7
examining body

organization that has been appointed to verify compliance with the applicable standard

Note 1 to entry: In certain cases, an external independent examining body can be required.

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ISO/FDIS 17779:2021(E)
[SOURCE: ISO/TR 25901­1:2016, 2.5.30]
3.8
filler metal
added metal applied to brazed joints

Note 1 to entry: Filler metal can be in the form of wire, inserts, powder, pastes, foil, etc.

3.9
flux

non-metallic material which, when molten, promotes wetting by removing existing oxide or other

detrimental films from the surfaces to be joined and prevents their re-formation during the joining

operation
[SOURCE: ISO 857­2:2005, 3.2.2]
3.10
test piece
brazed assembly which is used for testing purposes
3.11
test specimen

part or portion cut from the test piece in order to perform specified destructive testing

[SOURCE: ISO/TR 25901­1:2016, 2.2.1.6]
4  Preliminary brazing procedure specification (pBPS)

A preliminary brazing procedure specification shall be prepared. An example pBPS form is shown in

Annex B.
5  Brazing procedure test

The brazing and testing of test pieces shall be in accordance with Clause 6 and Clause 7.

A brazer or brazing operator who undertakes the brazing procedure test satisfactorily in accordance

with this document shall be considered qualified for the appropriate range of qualification in accordance

with ISO 13585, provided that the relevant testing requirements are met.
6  Test piece
6.1 General

The test piece or pieces shall be brazed using a type of joint design proposed in the pBPS and be

representative for the intended production.
6.2  Shape and dimensions of test pieces

If not specified in application standard, the shape and dimension of the test piece shall be agreed by the

contracting parties.

The test piece is typically a basic lap or butt joint in sheet material or a sleeve joint in tube (for examples

of applicable joint configurations, see Annex C).

The size of the test piece shall be sufficient to allow all required tests to be carried out. Additional test

pieces may be prepared in order to allow for extra and/or for re-testing specimens.

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ISO/FDIS 17779:2021(E)
6.3  Brazing of test pieces

Preparation and brazing of test pieces shall be carried out in accordance with the pBPS, and under the

general conditions of brazing in production, which they shall represent.

Brazing and testing of the test pieces shall be witnessed by an examiner or an examining body.

7  Examination and testing
7.1  Extent of testing

As a minimum, testing shall be carried out in accordance with Table 1, EN 12797 and EN 12799.

Table 1 — Examination and testing of the test pieces
Test piece Type of test Extent of testing
Visual, and 100 %
T-joint Metallographic, or 2 sections
Bend 2 specimens
Visual, and 100 %
Metallographic, and 2 sections
Lap joint
Shear, or 2 specimens
Peel 2 specimens
Visual, and 100 %
Metallographic, and 2 sections
Butt joint
Tensile, or 2 specimens
Bend 2 specimens

Normally, macro sections are sufficient. However, micro sections can be required.

One first surface and one second surface test.
Application standards can specify additional tests, e.g.:
— longitudinal tensile test;
— volumetric testing (RT or UT);
— corrosion tests;
— chemical analysis;
— cruciform test.

NOTE Specific service, material or manufacturing conditions can require more comprehensive testing than

is specified by this document in order to gain more information and to avoid repeating the brazing procedure

test at a later date just to obtain additional test data.
7.2  Test specimens
The shape and dimensions of test specimens shall be in accordance wi
...