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UDC 821.791.5.042: 620.1
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IS0
O RG A N IZAT I O N FO R STA ND AR D I2 AT I ON
I NT ERN AT I O NA L
IS0 R E CO M MEN DATI O N
R 688
FILLER RODS FOR BRAZE WELDING
METHODS OF TEST FOR DETERMINING
THE CHARACTERISTICS OF THE DEPOSITED METAL
1st EDITION
March 1968
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
IS0 Member Bodies. Reproduction of these
belongs to
documents, in any country, may be authorized therefore oniy
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 688, Filler rods for braze welding-Methods of test for
determining the characteristics of the deposited metal, was drawn up by Technical Commit-
tee ISO/TC 44, Welding, the Secretariat of which is held by the Association Française de
(AFNOR).
Normalisation
Work on this question by the Technical Committee began in 1957 and led, in 1961,
to the adoption of a Draft IS0 Recommendation.
'L In October 1965, this Draft IS0 Recommendation (No. 846) was circulated to all the
IS0 Member Bodies for enquiry. It was approved, subject to a few modifications of an
editorial nature, by the following Member Bodies :
Israel Sweden
Australia
Italy Switzerland
Austria
Belgium Japan U.A.R.
Brazil Netherlands United Kingdom
Canada New Zealand U.S.S.R.
Portugal Yugoslavia
Chile
Denmark Romania
France South Africa,
India Rep. of
Spain
Ireland
Two Member Bodies opposed the approval of the Draft:
Germany
U.S.A.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in March 1968, to accept it as an IS0 RECOMMENDATION.
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IÇO/R 688 - 1968 (E)
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IS0 Recommendation R 688 March 1968
IFILLER RODS FOR BRAZE WELDING
METHODS OF TEST FOR DETERMINING
THE CHARACTERISTICS OF THE DEPOSITED METAL
FOREWORD
This IS0 Recommendation is a companion to IS0 Recommendation R 698, Filler rods for braze
welding-Methods of test for determining the conventional bond strength on steel, cast iron and
other metals.
1. SCOPE
This IS0 Recommendation describes tests for filler rods for braze welding to determine:
L-
(a) the mechanical properties of the deposited metal :
- tensile strength,
- elongation;
(b) the melting point or melting temperature range.
2. DETERMINATION OF THE MECHANICAL PROPERTIES
2.1 Execution of deposit
2.1.1 Type ofsupportingplate
2.1.1.1 In order to determine the mechanical properties of metal deposited with braze
on the edge of a supporting plate, as shown in Figure 1,
welding fiiler rods, a deposit
should be made.
2.1.1.2 The supporting plate should be of mild steel and the edge on which the deposit is
made should be cleaned and degreased before the deposit is made.
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2.1.2 Operating conditions
2.1.2.1 The thickness of the supporting plate and the operating conditions should be
chosen as follows:
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