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IS0
I N T ER N AT I O N A L O R G A N I Z AT I O N FOR S TA N DARD I ZATl O N
IS0 RECOMMENDATION
R 637
METHODS OF TEST FOR DETERMINING THE MECHANICAL PROPERTIES
OF WELD METAL DEPOSITED BY FILLER RODS FOR GAS WELDING
MILD STEELS AND LOW ALLOY HIGH TENSILE STEELS
1st EDITION
November 1967
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The copyright of IS0 Recommendations and IS0 Standards
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 637, Methods of Testfor Determining the Mechanical Properties
of WeId Metal Deposited by Filler Rods for Gas Welding Mild Steels and Low Alloy High Tensile
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 1955 and led, in 1958, to the
adoption of a Draft IS0 Recommendation.
In September 1958, this Draft IS0 Recommendation (No. 227) 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 Germany Poland
Belgium India Romania
Bulgaria Israel Spain
Burma Italy Sweden
Denmark Japan Switzerland
Finland Netherlands United Kingdom
France Norway
Four Member Bodies opposed the approval of the Draft:
Austria
Canada
Republic of South Africa
U.S.S.R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
1967, to accept it as an IS0 RECOMMENDATION.
Council, which decided, in November
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ISO/R 637 - 1967 (E)
IS0 Recommendation R 637 N ovem ber 1967
METHODS OF TEST FOR DETERMINING THE MECHANICAL PROPERTIES
OF WELD METAL DEPOSITED BY FILLER RODS FOR GAS WELDING
MILD STEELS AND LOW ALLOY HIGH TENSILE STEELS
FOREWORD
This IS0 Recommendation is one of a set which also includes the following:
ISO/R 636, Code of Symbols for Filler Rods for Gas Welding of Mild Steels and Low
Alloy High Tensile Steels.
1. PREPARATION OF WELD DEPOSIT
1.1 For a given filler rod it is necessary to determine the mechanical properties for each of the
L
diameters manufactured.
1.2 To determine the mechanical properties of the weld metal from filler rods for gas
welding, weld metal deposited on a backing strip should be used, as shown in Figure 1.
The edge on which the metal is deposited should be straight and clean.
Dimensions in millimetres
1st face
I/
t
FIG. 1 - Method of heat treatment of weld deposit.
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ISO/R 637 - 1967 (E)
1.3 The thickness of the backing strip and the welding conditions should be selected as follows,
according to the diameter of the filler rod:
TABLE 1. - Welding conditions
~
Diameter of filler rod, mm 2 ’ 2.5 3.15 4 5 6.3
Thickness of backing strip “e”,
8 10 10 12 15
mm
Output of blowpipe * in l/h of
200 315 315 400 630
acetylene
-~
Number of runs 10 to 15 8 to 12 7 to 8 7 to 8 4 to 6
Approximate time of execution
80 70 60 60 60
**
in minutes
The backing strip should be of mild steel or low alloy high tensile steel.
1.3.1
1.4 The welding method should be either leftward welding in a slightly upward position (slope
about 307, or rightward welding in a horizontal position, the backing strip being placed
edgewise in all cases.
1.5 The weld deposit should be heat treated with a blowpipe.
The output of the blowpipe having been selected according to the data given in Table 1
1.5.1
above, and heating time selected according to the Annex, the treatment should be carried
out as follows :
T
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