oSIST prEN ISO 17672:2023
(Main)Brazing - Filler metals (ISO/DIS 17672:2023)
Brazing - Filler metals (ISO/DIS 17672:2023)
ISO 17672:2016 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.
Hartlöten - Lote (ISO/DIS 17672:2023)
Brasage fort Métaux d'apport (ISO/DIS 17672:2023)
ISO 17672:2016 spécifie les gammes de composition d'une série de métaux d'apport utilisés pour le brasage fort. Les métaux d'apport sont divisés en sept classes, d'après leur composition, mais pas nécessairement d'après leur élément majeur présent.
Trdo spajkanje - Dodajni materiali (ISO/DIS 17672:2023)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 17672:2023
01-maj-2023
Trdo spajkanje - Dodajni materiali (ISO/DIS 17672:2023)
Brazing - Filler metals (ISO/DIS 17672:2023)
Hartlöten - Lote (ISO/DIS 17672:2023)
Brasage fort Métaux d'apport (ISO/DIS 17672:2023)
Ta slovenski standard je istoveten z: prEN ISO 17672
ICS:
25.160.50 Trdo in mehko lotanje Brazing and soldering
oSIST prEN ISO 17672:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 17672:2023
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oSIST prEN ISO 17672:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17672
ISO/TC 44/SC 13 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-03-14 2023-06-06
Brazing — Filler metals
Brasage fort — Métaux d'apport
ICS: 25.160.50
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17672:2023(E)
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. © ISO 2023
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oSIST prEN ISO 17672:2023
ISO/DIS 17672:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17672
ISO/TC 44/SC 13 Secretariat: DIN
Voting begins on: Voting terminates on:
Brazing — Filler metals
Brasage fort — Métaux d'apport
ICS: 25.160.50
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
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WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 17672:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
© ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
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oSIST prEN ISO 17672:2023
ISO/DIS 17672:2023(E)
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 . 4
8.2.3 Rods . 5
8.2.4 Wires . 5
8.3 Condition . 5
8.4 Marking . 5
8.5 Packaging . 5
8.6 Product certificates . 5
9 Metal hazards . 5
Annex A (normative) Codification .17
Bibliography .22
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oSIST prEN ISO 17672:2023
ISO/DIS 17672:2023(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 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 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO's adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 44, Welding and allied processes.
This second edition cancels and replaces the first edition (ISO 17672:2010), which has been technically
revised.
Requests for official interpretations of any aspect of this International Standard should be directed to
the Secretariat of ISO/TC 44 via your national standards body. A complete listing of these bodies can be
found at www.iso.org.
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oSIST prEN ISO 17672:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 17672:2023(E)
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 International
Standard 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, e.g. precious metal jewellery, aerospace and dental, filler metals other than
those included in this International Standard are often used and 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 3677, Filler metal for soft soldering and braze welding — Designation
ISO 80000-1:2009, Quantities and units — Part 1: General
3 Terms and definitions
No terms and definitions are listed in this document.
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 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 International Standard
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.
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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 compliance with the requirements of this International
Standard, the actual test values obtained shall be subjected to the rounding-off instructions given
in ISO 80000-1:2009, 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 complying with 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.
Table 1 — Impurity limits for special vacuum requirements
Limit
% by mass max.
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
0,001 0,002
−5 d
pressure at 500 °C is > 1,3 × 10 Pa
a
For filler metal Ag 272 (see Table 6), lower levels may 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 it should be noted that in the case of
many brazing alloys, the use of reference materials may 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
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ISO/DIS 17672:2023(E)
routine analysis is indicated to be in excess of 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 spatter test may be
performed, see [2].
7 Designation
The filler metal shall be designated by the description “filler metal,” reference to this International
Standard (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 International Standard, 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 International Standard;
“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 International Standard;
“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/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 7.2.2), rods (see 7.2.3) and, to a lesser extent, wires (see 7.2.4)
are defined. For other forms and dimensions not listed in the respective tables, the purchaser and the
manufacturer/supplier shall agree on the dimensions and tolerances at the time of placing the order.
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oSIST prEN ISO 17672:2023
ISO/DIS 17672:2023(E)
8.2.2 Foils
The tolerances for thickness, width and camber are given in Tables 2, 3 and 4.
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.
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ISO/DIS 17672:2023(E)
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 %.
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/supplier;
c) the trade name (if any);
d) the quantity of material and, if applicable, the dimensions;
e) the supplier's batch number;
f) health and safety warnings (as required by national regulations).
8.5 Packaging
Brazing filler metals or products containing them shall be packed to provide sufficient safeguard
against damage and deterioration during transportation and storage.
8.6 Product certificates
If certificates (like those specified in ISO 14344) of conformity and/or analysis are required, the
purchaser and the manufacturer/supplier shall agree on the details at the time of placing the order.
9 Metal hazards
Although not directly relevant to the requirements of this International Standard, any national
requirements for limiting exposure to metal hazards, e.g. fume, should be observed. This is particularly
important when using brazing filler metals containing cadmium as an alloying element.
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Table 5 — Class Al: aluminium and magnesium brazing filler metals
Code Composition Melting
% by mass 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 0,0002/0,0008 0,05 0,30 8,3/9,7 443 599
Ni: —/0,005
Maximum impurity limits applicable to all types are (% by mass) Cd 0,010 and Pb 0,025.
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Table 6 — Class Ag: silver brazing filler metals
Melting
Composition
Code temperature
% by mass
(approximate)
Sn
Ag Cu Zn Cd Ni Mn Others Solidus Liqui-
min./
min./max. min./max. min./max. min./max. min./max. min./max. min./max. °C dus °C
max.
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
Si:
Ag 205 4,0/6,0 54,0/56,0 38,0/42,0 —/— —/— —/— —/— 820 870
0,05/0,25
Si:
Ag 212 11,0/13,0 47,0/49,0 38,0/42,0 —/— —/— —/— —/— 800 830
0,05/0,25
Si:
Ag 220 19,0/21,0 43,0/45,0 34,0/38,0 —/— —/— —/— —/— 690 810
0,05/0,25
Ag 225 24,0/26,0 39,0/41,0 33,0/37,0 —/— —/— —/— —/— —/— 700 790
Ag 230 29,0/31,0 37,0/39,0 30,0/34,0 —/— —/— —/— —/— —/— 680 765
Si:
Ag 230A 29,0/31,0 35,0/37,0 29,5/34,0 —/— —/— 2,0/2,5 —/— 675 790
0,05/0,15
Ag 235 34,0/36,0 31,0/33,0 31,0/35,0 —/— —/— —/— —/— —/— 685 755
Ag 244 43,0/45,0 29,0/31,0 24,0/28,0 —/— —/— —/— —/— —/— 675 735
Ag 245 44,0/46,0 29,0/31,0 23,0/27,0 —/— —/— —/— —/— —/— 665 745
Ag 250 49,0/51,0 33,0/35,0 14,0/18,0 —/— —/— —/— —/— —/— 690 775
Ag
49,0/51,0 49,0/51,0 —/— —/— —/— —/— —/— —/— 780 870
a
250A
In:
Ag 260 59,0/61,0 25,0/27,0 —/— —/— —/— —/— —/— 605 710
13,0/15,0
In:
a
Ag 261 60,5/62,5 23,0/25,0 —/— —/— —/— —/— —/— 625 710
14,0/15,0
Ag 265 64,0/66,0 19,0/21,0 13,0/17,0 —/— —/— —/— —/— —/— 670 720
Ag 270 69,0/71,0 19,0/21,0 8,0/12,0 —/— —/— —/— —/— —/— 690 740
a
Ag 272 71,0/73,0 27,0/29,0 —/— —/— —/— —/— —/— —/— 780 780
Maximum impurity limits applicable to all types are (% by mass) Al 0,001, Bi 0,030, Cd 0,010, P 0,008, Pb 0,025; Si 0,05; total of
all impurities = 0,15; total of all impurities for Ag 427, Ag 449 and Ag 485 = 0,30.
If Si is intentionally added to all alloys of Table 6, the range shall be between 0,05 and 0,25 (% by mass).
The filler metals then have to be designated additionally by description Si at the end.
For example: Filler metal ISO 17672-Ag 155Si or Filler metal ISO 17672-B-Ag55ZnCuSn(Si)-630/660.
a
For special vacuum applications, see Table 1.
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TTabablele 6 6 ((ccoonnttiinnueuedd))
Melting
Composition
Code temperature
% by mass
(approximate)
Sn
Ag Cu Zn Cd Ni Mn Others Solidus Liqui-
min./
min./max. min./max. min./max. min./max. min./max. min./max. min./max. °C dus °C
max.
Ag-Cu-Zn-Cd alloys
Ag 326 24,0/26,0 29,0/31,0 25,5/29,5 16,5/18,5 —/— —/— —/— —/— 605 720
Ag 330 29,0/31,0 27,0/29,0 19,0/23,0 19,0/23,0 —/— —/— —/— —/— 600 690
Ag 335 34,0/36,0 25,0/27,0 19,0/23,0 17,0/19,0 —/— —/— —/— —/— 610 700
Ag 340 39,0/41,0 18,0/20,0 19,0/23,0 18,0/22,0 —/— —/— —/— —/— 595 630
Ag 345 44,0/46,0 14,0/16,0 14,0/18,0 23,0/25,0 —/— —/— —/— —/— 605 620
Ag 350 49,0/51,0 14,5/16,5 14,5/18,5 17,0/19,0 —/— —/— —/— —/— 620 640
Ag 351 49,0/51,0 14,5/16,5 13,5/17,5 15,0/17,0 —/— 2,5/3,5 —/— —/— 635 655
Ag-Cu-Zn-Ni-Mn alloys
Ag 425 24,0/26,0 37,0/39,0 31,0/35,0 —/— —/— 1,5/2,5 1,5/2,5 —/— 705 800
Ag 427 26,0/28,0 37,0/39,0 18,0/22,0 —/— —/— 5,0/6,0 8,5/10,5 —/— 680 830
Ag 440 39,0/41,0 29,0/31,0 26,0/30,0 —/— —/— 1,5/2,5 —/— —/— 670 780
Ag 449 48,0/50,0 15,0/17,0 21,0/25,0 —/— —/— 4,0/5,0 7,0/8,0 —/— 680 705
Ag 450 49,0/51,0 19,0/21,0 26,0/30,0 —/— —/— 1,5/2,5 —/— —/— 660 705
Ag 454 53,0/55,0 37,5/42,5 4,0/6,0 —/— —/— 0,5/1,5 —/— —/— 720 855
Ag 456 55,0/57,0 41,0/43,0 —/— —/— —/— 1,5/2,5 —/— —/— 770 895
In:
Ag 456A 55,0/57,0 26,25/28,25 —/— —/— —/— 2,0/2,5 600 710
13,5/15,5
Ag 463 62,0/64,0 27,5/29,5 —/— —/— 5,0/7,0 2,0/3,0 —/— —/— 690 800
a
Ag 471 70,5/72,5 27,0/29,0 —/— —/— —/— 0,3/0,8 —/— —/— 780 795
Ag 485 84,0/86,0 —/— —/— —/— —/— —/— 14,0/16,0 —/— 960 970
Maximum impurity limits applicable to all types are (% by mass) Al 0,001, Bi 0,030, Cd 0,010, P 0,008, Pb 0,025; Si 0,05; total of
all impurities = 0,15; total of all impurities for Ag 427, Ag 449 and Ag 485 = 0,30.
If Si is intentionally added to all alloys of Table 6, the range shall be between 0,05 and 0,25 (% by mass).
The filler metals then have to be designated additionally by description Si at the end.
For example: Filler metal ISO 17672-Ag 155Si or Filler metal ISO 17672-B-Ag55ZnCuSn(Si)-630/660.
a
For special vacuum applications, see Table 1.
8
© ISO 2023 – All rights reserved
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oSIST prEN ISO 17672:2023
ISO/DIS 17672:2023(E)
Table 7 — Class CuP: copper-phosphorus brazing filler metals
Composition Melting temperature
Code
% by mass (approximate)
Cu P Ag Other Solidus Liquidus
min./max. min./max. min./max. °C °C
Cu P alloys
CuP 178 Remainder 4,8/5,3 —/— —/— 710 925
CuP 179 Remainder 5,9/6,5 —/— —/— 710 890
CuP 180 Remainder 6,6/7,4 —/— —/— 710 820
CuP 181 Remainder 7,0/7,5 —/— —/— 710 793
CuP 182 Remainder 7,5/8,1 —/— —/— 710 770
Ag-Cu-P alloys
CuP 279 Remainder 5,9/6,7 1,5/2,5 —/— 645 825
CuP 280 Remainder 6,8/7,2 1,8/2,2 —/— 645 788
CuP 281 Remainder 5,8/6,2 4,8/5,2 —/— 645 815
CuP 281A Remainder 5,7/6,3 4,5/5,5 —/— 645 815
CuP 282 Remainder 6,5/7,0 4,8/5,2 —/— 645 771
CuP 283 Remainder 7,0/7,5 5,8/6,2 —/— 645 720
CuP 283A Remainder 7,0/7,5 5,8/6,2 Ni 0,05/0,15 645 720
CuP 284 Remainder 4,8/5,2 14,5/15,5 —/— 645 800
CuP 285 Remainder 6,0/6,7 17,2/18,0 —/— 645 666
CuP 286 Remainder 6,6/7,5 17,0/19,0 —/— 645 645
Cu-Sn-Si-Sb alloys
Sn 6,0/7,0
CuP 385 Remainder 6,0/7,0 —/— 635 675
Si 0,01/0,4
CuP 386 Remainder 6,4/7,2 —/— Sn 6,5/7,5 650 700
CuP 389 Remainder 5,6/6,4 —/— Sb 1,8/2,2 690 825
Maximum impurity limits applicable to
...
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