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UDC 669.7 1 -46 2 :6 20.1 77
IS0
I N TERN AT I O N A L O R G AN 1 ZATl O N FOR STA N DA RD IZATl ON
ISO RECC"+MEN~ATION .
FLATTENING TEST
ON ALUMINIUM AND ALUMINIUM ALLOt' TUBES
1st EDITION
January 1969
COPYRIGHT RESERVED
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 955, Flattening test on aluminium and aluminium alloy tubes,
was drawn up by Technical Committee ISOlTC 79, Light metals and their alloys, the Secretariat of
which is held by the Association Française de Normalisation (AFNOR).
Work on this question led, in 1966, to the adoption of a Draft 1SO Recommendation.
In March 1967, this Draft IS0 Recommendation (No. 1135) 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 :
Belgium Israel Switzerland
Canada Italy Thailand
Chile Japan Turkey
U.A.R.
Czechoslovakia Netherlands
France United Kingdom
New Zealand
Germany Norway U.S.A.
Greece Poland U.S.S.R.
Yugoslavia
Hungary South Africa, Rep. of
India Sweden
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in January 1969, to accept it as an IS0 RECOMMENDATION.
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lSO/R 955-1969(E
IS0 Recommendation R 955 January 1969
FLATTENING TEST
ON ALUMINIUM AND ALUMINIUM ALLOY TUBES
1. SCOPE
This IS0 Recommendation applies to aluminium and aluminium alloy tubes. Individual material
specifications may specify the maximum diameter and thickness of tube to which this test is to be
applied.
2. PRINCIPLE OF TEST
The test consists in flattening the end of a tube or test piece of specified length cut from a tube in a
direction perpendicular to the longitudinal axis of the tube.
When the test is carried out so that, after the test. the internal surfaces of the test piece are in
contact over at least half of the internal width of th
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