SIST EN ISO 17672:2024

SLOVENSKI STANDARD
01-oktober-2024
Nadomešča:
SIST EN ISO 17672:2016
Trdo spajkanje - Dodajni materiali (ISO 17672:2024)
Brazing - Filler metals (ISO 17672:2024)
Hartlöten - Lote (ISO 17672:2024)
Brasage fort - Métaux d'apport (ISO 17672:2024)
Ta slovenski standard je istoveten z: EN ISO 17672:2024
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 17672
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 25.160.50 Supersedes EN ISO 17672:2016
English Version
Brazing - Filler metals (ISO 17672:2024)
Brasage fort - Métaux d'apport (ISO 17672:2024) Hartlöten - Lote (ISO 17672:2024)
This European Standard was approved by CEN on 7 July 2023.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17672:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 17672:2024) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2024, and conflicting national standards
shall be withdrawn at the latest by November 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 17672:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Endorsement notice
The text of ISO 17672:2024 has been approved by CEN as EN ISO 17672:2024 without any modification.

International
Standard
ISO 17672
Third edition
Brazing — Filler metals
2024-04
Brasage fort — Métaux d'apport
Reference number
ISO 17672:2024(en) © ISO 2024
ISO 17672:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 17672:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Composition . 1
5 Special vacuum requirement . 2
6 Chemical analysis . . 2
7 Designation . 3
8 Technical delivery conditions . 3
8.1 Types of product .3
8.2 Dimensions .3
8.2.1 General .3
8.2.2 Foils .3
8.2.3 Rods .4
8.2.4 Wires .4
8.3 Condition .5
8.4 Marking .5
8.5 Packaging .5
8.6 Product certificates .5
9 Health and safety precautions . 5
Annex A (informative) Codification . 16
Bibliography .21

iii
ISO 17672:2024(en)
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 non-governmental, 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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 13, Brazing materials and processes, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 121, Welding and allied processes, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 17672:2016), which has been technically
revised.
The main changes are as follows:
— in Clause 6, the spatter test was added;
— in 8.2.2, a NOTE on foils with a width of less than 3 mm was added;
— in Table 6, four new silver brazing filler metals were added;
— in Table 7, the range of Si was changed to 0,01 up to 0,25 (mass fraction %) if intentionally added;
— in Table 11, two new Ni-Cr-P-Si alloys were added;
— in Table A.1, the codes were updated and corresponding GB codes were added.
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
International Standard ISO 17672:2024(en)
Brazing — Filler metals
1 Scope
This document specifies the compositional ranges of a series of filler metals used for brazing. The filler
metals are divided into seven classes, related to their composition but not necessarily to the major element
present.
NOTE 1 For the major element(s) present, see Annex A.
In the case of composite products, such as flux-coated rods, pastes or plastics tapes, this document covers
only the filler metal that forms parts of such products. The melting temperatures given in the tables are only
approximate, as they necessarily vary within the compositional range of the filler metal. Therefore, they are
given only for information. Technical delivery conditions are given for brazing filler metals and products
containing brazing filler metals with other constituents such as flux and/or binders.
NOTE 2 For some applications, such as precious metal jewellery, aerospace and dental, filler metals other than those
included in this document are often used. These are covered by other International Standards to which reference can
be made.
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 80000-1:2022, Quantities and units — Part 1: General
3 Terms and definitions
No terms and definitions are listed in this document.
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/
4 Composition
The filler metal shall have a composition in accordance with Tables 5 to 13 for the particular type, except as
modified for special vacuum requirements (see Clause 4 and Table 1).
If the values for an element range from 0 (—) to a defined value, the element may be, but does not have to be,
in that brazing filler metal.
For the purposes of determining compliance with composition limits, any value obtained from the analysis
shall be rounded to the same number of decimal places as used in this document in expressing the specified
limit. The following rules shall be used for rounding:
a) When the figure immediately after the last figure to be retained is less than five, then the last figure to
be retained shall be kept unchanged.

ISO 17672:2024(en)
b) When the figure immediately after the last figure to be retained is either:
1) greater than five; or
2) equal to five and followed by at least one figure other than zero,
the last figure to be retained shall be increased by one.
c) When the figure immediately after the last figure to be retained is equal to five and followed by zeros
only, then the last figure to be retained shall be left unchanged if even and increased by one if odd. For
the purposes of determining conformity to the requirements of this document, the actual test values
obtained shall be subjected to the rounding-off instructions given in ISO 80000-1:2022, Annex B.
NOTE The chemical analysis is of the bulk material, but the material can be composed of discrete powders with
different individual compositions or multiple layers of roll-clad foils, where each layer can have a different individual
composition.
5 Special vacuum requirement
In a few instances, which are most likely to apply to Ag 272, Pd 287, Pd 387, Pd 388, Pd 481, Pd 483, Pd 484,
Pd 587, Pd 647 and Au 295, Au 375, Au 625, Au 752, Au 801 and Au 827, lower impurity limits can be required
for brazing in vacuum or service in vacuum and these limits shall be as given in Table 1.
Filler metals conforming to Table 1 shall have the letter V added as a suffix to the codification plus the digit
1 or 2 to indicate the grade.
NOTE Grade 1 is intended for the most demanding duties, Grade 2 for less demanding duties.
Table 1 — Impurity limits for special vacuum requirements
Limit
max. mass fraction
Impurity
%
Grade 1 Grade 2
a
C 0,005 0,005
Cd 0,001 0,002
b
P 0,002 0,002
Pb 0,002 0,002
Zn 0,001 0,002
c
Mn 0,001 0,002
c
In 0,002 0,003
All other elements where vapour pres-
0,001 0,002
−5 d
sure at 500 °C is > 1,3 × 10 Pa
a
For filler metal Ag 272 (see Table 6), lower levels can be available by agreement
between the purchaser and the supplier.
b
For filler metal Ag 272, 0,02 % maximum.
c
Except where otherwise specified in Tables 5 to 13.
d
Examples of such elements are Ca, Cs, K, Li, Mg, Na, Rb, S, Sb, Se, Sr, Te and Tl. For such
elements (including Cd, Pb and Zn), the total is limited to 0,010 %.
6 Chemical analysis
Chemical analyses shall be carried out by any suitable method but, in the case of many brazing alloys, the
use of reference materials can be essential, as agreed between the purchaser and the supplier. Analysis is
only required to be carried out routinely for those elements for which specific limits are shown. If, however,
the presence of other elements is suspected or in the course of routine analysis is indicated to be in excess of

ISO 17672:2024(en)
the limits laid down for unnamed elements or would bring the total of impurities above the specified limit,
further analyses shall be carried out for such elements.
To determine the oxide content of brazing filler metals for vacuum applications, a spatter test may be
performed, see Reference [3].
7 Designation
The filler metal shall be designated by the description “filler metal,” reference to this document (i.e.
ISO 17672) and a code. Details of the two options for the code system used are given in Annex A.
As an example, the designations of an aluminium filler metal containing 11 % to 13 % Si, in accordance with
this document, can be made in one of the following ways:
EXAMPLE 1 Filler metal ISO 17672-Al 112
where
“Filler metal” is the description;
“ISO 17672” is the reference to this document;
“Al 112” is the short code given in Tables 5 to 13.
EXAMPLE 2 Filler metal ISO 17672-B-Al88Si-575/585
where
“Filler metal” is the description;
“ISO 17672” is the reference to this document;
“B” denotes brazing;
“Al88Si-575/585” is the code in accordance with ISO 3677.
8 Technical delivery conditions
8.1 Types of product
The form of the material shall be agreed between the purchaser and the manufacturer or supplier at the
time of placing the order.
NOTE Brazing filler metals are available as rod, wire, foil (or preforms made from them) or powder, although not
all filler metals are necessarily available in every type of product. They are also available as a constituent of brazing
pastes or, particularly in the case of aluminium brazing filler metals, clad onto one or both sides of an alloy sheet. Rods
and wire can be completely or partially coated or cored with flux.
8.2 Dimensions
8.2.1 General
Dimensions and tolerances for foils (see 8.2.2), rods (see 8.2.3) and, to a lesser extent, wires (see 8.2.4)
are defined. For other forms and dimensions not listed in the respective tables, the purchaser and the
manufacturer or supplier shall agree on the dimensions and tolerances at the time of placing the order.
8.2.2 Foils
The tolerances for thickness, width and camber are given in Tables 2, 3 and 4.

ISO 17672:2024(en)
Table 2 — Thickness tolerance for foils
Thickness
Limits of thickness
nominal size
related to width over 1 mm
(nominal size)
mm
over to
— 0,05 ±10 %
0,05 0,1 ±0,005 mm
0,1 0,2 ±0,010 mm
0,2 0,3 ±0,015 mm
0,3 0,4 ±0,018 mm
0,4 0,5 ±0,020 mm
0,5 0,8 ±0,025 mm
0,8 1,2 ±0,030 mm
1,2 2,0 ±0,035 mm
Table 3 — Width tolerance for foils
Thickness Limits of width
nominal size related to width (nominal size)
mm mm
over 50 mm
over to to 50 mm over 100 mm
to 100 mm
+02, +03, +04,
— 0,1
0 0 0
+02, +03, +04,
0,1 1,0
0 0 0
+03, +04, +05,
1,0 2,0
0 0 0
Table 4 — Camber tolerance for foils
Thickness Max. camber for width
nominal size nominal size
mm mm/m
from 3 mm over 10 mm over 15 mm over 30 mm
over to over 50 mm
to 10 mm to 15 mm to 30 mm to 50 mm
— 0,5 10 7 4 3 3
0,5 2,0 15 10 6 4 4
NOTE Foils with a width of less than 3 mm cannot be measured due to their very easy deformability, as they
straighten out even under the slightest force. Therefore, the reproducibility of the values based on the existing
measuring methods – and possibilities – is not given.
8.2.3 Rods
For rods, the preferred diameters are 1 mm, 1,5 mm, 2 mm, 2,5 mm, 3 mm and 5 mm and the preferred
lengths are 500 mm and 1 000 mm. The tolerance on diameter shall be ±3 % for drawn rods and ±0,3 mm for
other fabrication processes. The tolerance on length shall be ±5 mm.
8.2.4 Wires
For wires, there are no preferred diameters and the tolerance on diameter shall be ±3 %.

ISO 17672:2024(en)
8.3 Condition
The surface of brazing filler metals shall be free from contamination which could adversely affect brazing.
With flux-coated rods, the coating shall firmly adhere to the rod and shall not break off during proper
handling and usage. Welds, when present, shall have been made so as not to interfere with uniform,
uninterrupted feeding of filler metal on automatic and semiautomatic brazing.
8.4 Marking
Since in many cases the marking of brazing filler metals themselves is impracticable, reliance shall be
placed on the marking of packets. The outside of each smallest unit package shall be clearly marked with the
following information:
a) the designation in accordance with Clause 6;
b) the name of the manufacturer or supplier;
c) the trade name (if any);
d) the quantity of material and, if applicable, the dimensions;
e) the supplier's batch number;
f) any hazard warnings as applicable.
8.5 Packaging
Brazing filler metals or products containing them shall be packed to provide a sufficient safeguard against
damage and deterioration during transportation and storage.
8.6 Product certificates
If certificates of conformity and/or analysis (e.g. those specified in ISO 14344) are required, the purchaser
and the manufacturer or supplier shall agree on the details at the time of placing the order.
9 Health and safety precautions
When working with filler metals, refer to the manufacturer safety data sheet (SDS) before use.
NOTE National legislation regarding transportation, storage, use and disposal of filler metals and regarding
limiting exposure to metal hazards, for example fume, can exist. This is particularly important when using brazing
filler metals containing cadmium as an alloying element.

ISO 17672:2024(en)
Table 5 — Class Al: aluminium and magnesium brazing filler metals
Code Composition Melting
mass fraction temperature
% (approximate)
Si Fe Cu Mn Mg Zn Others Non-defined elements Al
Each Total Solidus Liquidus
min./max. min./max. min./max. min./max. min./max. min./max. min./max. max. max. min./max. °C °C
Al-Si alloys
Al 105 4,5/6,0 —/0,6 —/0,30 —/0,15 —/0,20 —/0,10 Ti: —/0,15 0,05 0,15 Remainder 575 630
Al 107 6,8/8,2 —/0,8 —/0,25 —/0,10 —/— —/0,20 —/— 0,05 0,15 Remainder 575 615
Al 110 9,0/11,0 —/0,8 —/0,30 —/0,05 —/0,05 —/0,10 Ti: —/0,20 0,05 0,15 Remainder 575 590
Al 112 11,0/13,0 —/0,8 —/0,30 —/0,15 —/0,10 —/0,20 —/— 0,05 0,15 Remainder 575 585
Al-Si-Cu alloys
Al 210 9,3/10,7 —/0,8 3,3/4,7 —/0,15 —/0,15 —/0,20 Cr: —/0,15 0,05 0,15 Remainder 520 585
Al-Si-Mg alloys
Al 310 9,0/10,5 —/0,8 —/0,25 —/0,10 1,0/2,0 —/0,20 —/— 0,05 0,15 Remainder 555 590
Al 311 9,0/10,5 —/0,8 —/0,25 —/0,10 1,0/2,0 —/0,20 Bi: 0,02/0,20 0,05 0,15 Remainder 555 590
Al 315 9,5/11,0 —/0,8 —/0,25 —/0,10 0,20/1,0 —/0,20 —/— 0,05 0,15 Remainder 559 591
Al 317 11,0/13,0 —/0,8 —/0,25 —/0,10 0,10/0,50 —/0,20 —/— 0,05 0,15 Remainder 562 582
Al 319 10,5/13,0 —/0,8 —/0,25 —/0,10 1,0/2,0 —/0,20 —/— 0,05 0,15 Remainder 559 579
Al-Si-Zn alloys
Al 410 9,0/11,0 —/0,8 —/0,3 —/0,05 —/0,05 0,50/3,0 —/— 0,05 0,15 Remainder 576 588
Al 415 6,8/8,2 —/0,8 —/0,25 —/0,10 —/— 0,50/3,0 —/— 0,05 0,15 Remainder 576 609
Mg alloys
Be:
Mg 001 —/0,05 —/0,005 —/0,05 0,15/1,5 Remainder 1,7/2,3 0,000 2/0,000 8 0,05 0,30 8,3/9,7 443 599
Ni: —/0,005
Maximum impurity limits applicable to all types are mass fractions Cd 0,010 and Pb 0,025.

ISO 17672:2024(en)
Table 6 — Class Ag: silver brazing filler metals
Composition Melting
Code mass fraction temperature
% (approximate)
Ag Cu Zn Cd Sn Ni Mn Others min./ Solidus Liquidus

min./max. min./max. min./max. min./max. min./max. min./max. min./max. max. °C °C
Ag-Cu-Zn-Sn alloys
Ag 125 24,0/26,0 39,0/41,0 31,0/35,0 —/— 1,5/2,5 —/— —/— —/— 680 760
Ag 130 29,0/31,0 35,0/37,0 30,0/34,0 —/— 1,5/2,5 —/— —/— —/— 665 755
Ag 134 33,0/35,0 35,0/37,0 25,5/29,5 —/— 2,0/3,0 —/— —/— —/— 630 730
Ag 138 37,0/39,0 31,0/33,0 26,0/30,0 —/— 1,5/2,5 —/— —/— —/— 650 720
Ag 140 39,0/41,0 29,0/31,0 26,0/30,0 —/— 1,5/2,5 —/— —/— —/— 650 710
Ag 145 44,0/46,0 26,0/28,0 23,5/27,5 —/— 2,0/3,0 —/— —/— —/— 640 680
Ag 155 54,0/56,0 20,0/22,0 20,0/24,0 —/— 1,5/2,5 —/— —/— —/— 630 660
Ag 156 55,0/57,0 21,0/23,0 15,0/19,0 —/— 4,5/5,5 —/— —/— —/— 620 655
Ag 160 59,0/61,0 29,0/31,0 —/— —/— 9,5/10,5 —/— —/— —/— 600 730
Ag-Cu-Zn alloys
Ag 205 4,0/6,0 54,0/56,0 38,0/42,0 —/— —/— —/— —/— Si: 0,05/0,25 820 870
...