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IS0
N D ARD IZATI O N
I NTERN AT1 O N A L ORGAN IZATl ON FOR STA
IS0 RECOMMENDATION
R 148
BEAM IMPACT TEST V-NOTCH FOR STEEL
1st EDITION
February 1960
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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 oniy valid standard is the national standard of that country.
hinted 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 148, Beam Inipact Test (V Notch) on Steel, was drawn
up by Technical Committee ISO/TC 17, Steel, the Secretariat of which is held by the
British Standards Institution (B.S.I.).
Between the third and the fourth plenary meeting of ISO/TC 17, held respectively in
London, in December 1953 and in Stockholm, in June 1955, Working Group ISO/TC
17/WG 1, Methods of Mechanical Testing,for Steel, carried on a good deal of research
in connection with this sort of test.
A draft proposal was submitted to the Technical Committee during its fourth plenary
meeting, but no agreement could be reached and doubts were expressed as to the usefulness
of such a test except perhaps for research work. The general opinion at the plenary
meeting was, however, that the preparation of such a Recommendation would be desirable,
and Working Group No. 1 was requested to continue this study.
A second draft proposal was submitted to the Technical Committee during its fifth
plenary meeting, held in London, in March 1957, where it was considerably amended.
As a result of decisions reached at this meeting, a third draft proposal was prepared by
the Secretariat and was submitted to the members of ISO/TC 17 for their approval. A few
minor changes were felt to be in order, and the draft proposal thus revised was adopted
as a Draft IS0 Recommendation.
On 11 July 1958, the Draft IS0 Recommendation (No. 208) was distributed to all the
IS0 Member Bodies and was approved, subject to some modifications, by the following
Member Bodies :
Australia France Romania
Austria Germany Spain
Belgium Hungary Sweden
Bulgaria India Switzerland
Burma Israel United Kingdom
Italy U.S.S.R.
Chile
Czechoslovakia New Zealand Yugoslavia
Denmark Norway
Finland Poland
One Member Body opposed the approval of the Draft: Japan.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in February 1960, to accept it as an IS0 RECOMMENDATION.
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iSO/ R 148 - 1WO (E)
IS0 Recommendation R 148 February 1960
BEAM IMPACT TEST V-NOTCH FOR STEEL
1. PRINCIPLE OF TEST
The test consists in breaking by one blow from a swinging hammer, under conditions defined
hereafter, a test piece V-notched in the middle and supported at each end. The energy absorbed
is determined.
2. SYMBOLS AND DESIGNATIONS
Number Symbol Designation SUe dimedon
1 - Length of test piece 55 lllIll
a Thickness of test piece 10 mm
2
10 mm
3 b Width of test piece
-
Thickness of test piece minus depth of notch 8 mm
4
(depth below
...