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IS0
I N T E R N AT I O N A L O R G A N 12 AT I ON FOR STAN DA RD IZAT I O N
I
IS0 RECOMMENDATION
R 708
FILLER RODS FOR GAS WELDING
TEST TO DETERMINE THE COMPATIBILITY OF STEEL FILLER RODS
AND THE PARENT METAL IN THE WELDING OF STEELS
/
1 st EDITION
April 1968
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belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
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 708, Filler rods for gas welding - Test to determine the compati-
bilily of steel filler rods and the parent metal in the welding of steels was drawn up by Technical
Committee ISO/TC 44, Welding, the Secretariat of which is held by the Association Française de
Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1961 and led, in 1965, to the
adoption of a Draft IS0 Recommendation.
In May 1966, this Draft IS0 Recommendation (No. 977) 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 :
Australia Ireland Switzerland
Belgium Israel Turkey
Japan U.A.R.
Brazil
Canada Korea, Rep. of United Kingdom
Chile Netherlands U.S.A.
Czechoslovakia Norway U.S.S.R.
Denmark Portugal Yugoslavia
France Romania
Germany South Africa,
Hungary Rep. of
India Spain
Three Member Bodies opposed the approval of the Draft :
Finland
Poland
Sweden
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council
which decided, in April 1968, to accept it as an IS0 RECOMMENDATION.
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ISO/R 708-1968 (E
IS0 Recommendation R 708 April 1968
FILLER RODS FOR GAS WELDING
TEST TO DETERMINE THE COMPATIBILITY OF STEEL FILLER RODS
AND THE PARENT METAL IN THE WELDING OF STEELS
1. SCOPE
This IS0 Recommendation gives the conditions in which it is possible to determine the compatibility
of filler rods and the parent metal in the gas welding of steels, based on the results of tests on a welded
joint, welded under the conditions laid down for the construction, using the filler rod and parent
metal specified for this construction.
2. NATURE AND DIMENSIONS OF THE TEST ASSEMBLY
The test assembly should be of plate of the same composition as that of the plates specified for the
construction, and of the same thickness, but at least 4 mm. The dimensions of the test assembly
should be in conformity with the information given in Figure 1.
3. WELDING PROCEDURE
The quality and dimensions of the filler rod, the edge preparation and root gap, the method of
welding, the gas consumption and the flame adjustment of the blowpipe should be as specified for the
construction.
If provision is made for heat-treating the construction, the joint should be given the same treatment.
With regard to the designation of the filler rod, reference should be made to IS0 Recommendation
R 636, Code of symbols for filler rods for gas welding mild and low alloy high tensile steels.
4. REMOVAL OF TEST PIECE BLANKS
If provision is made for non-destructive testing of the construction, the test assembly should be tested
in the same way before the test pieces are taken.
The test piece blanks should be taken from the test assembly in accordance with the indications given
in Figure 2. The test piece blanks required are as follows :
~ one for the tensile test, taken from the parent metal . . . . . . . . (14
- one for the bend test, taken from the parent metal . . . . . . . . (2a)
~ two for the tensile test, taken from the welded joint . . . . . . . . (lb) and (lc)
~ two for the bend test, taken from the welded joint . . . . . . . . (2b) and (2c)
The test piece blanks may be removed either by mechanical
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