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Ref. No.: IS0 / R 149 - 1960 (E)
IS0
I N T ER N AT I O N A L ORGAN IZAT 1 ON FOR S TA N DARD 1 Z AT I O N
ISO R$OMMENDATION
MODIFIED ERICH CUPPING TEST
FOR STEEL,^^
1st ED IT10 N
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 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 149, Modijîed Erichsen Cupping Test for Steel Sheet and
Strip, was drawn up by Technical Committee ISO/TC 17, Steel, the Secretariat of which
is held by the British Standards Institution (B.S.I.).
Cupping tests were first considered during a meeting of Working Group ISO/TC
17/WG 1, Methods of mechanical testing for steel, held in London in November 1954. This
discussion led to a proposal covering both the Erichsen and the Olsen cupping tests, which
the Working Group submitted to the Technical Committee during its fourth plenary
meeting, held in Stockholm in June 1955. The Technical Committee decided to refer the
question back to the Working Group for study, requesting it to continue its efforts with
a view to setting up a proposal dealing with a single cupping test.
During the fifth plenary meeting of ISO/TC 17, held in London in March 1957, the
Working Group submitted a draft proposal for a single cupping test, and this was adopted,
subject to a few minor amendments. Following the decisions reached at that meeting, the
Secretariat drew up a new draft proposal, which was submitted to all the Members of the
Technical Committee for vote by letter ballot. This new draft proposal was accepted,
subject to a few amendments, and in its revised form was adopted as a Draft IS0 Recom-
mendation.
On 11 July 1958, the Draft IS0 Recommendation (No. 209) was distributed to all the
IS0 Member Bodies and was approved, subject to small editorial modifications, by the
following 24 Member Bodies :
Australia Finland New Zealand
Austria France Norway
Belgium Germany Poland
Bulgaria Hungary Romania
Burma India Spain
Chile
Israel Sweden
Czechoslovakia
Italy Switzerland
Denmark Japan Yugoslavia
Two Member Bodies opposed the approval of the Draft:
United Kingdom U.S.S.R.
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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IS0 / R 149 - 1960 (E)
IS0 Recommendation R 149 February 1960
MODIFIED ERICHSEN CUPPING TEST
FOR STEEL SHEET AND STRIP
1. PRINCIPLE
The test consists in :
pressing the clamped test piece into a die by means of a ball or a tool (penetrator) with a
spherical end until rupture commences;
measuring the depth of the cup.
2. SCOPE
The test as defined below is normally applicable to products having a thickness of not less than
0.5 mm and not more than 2 mm. It may however be extended to products having a thickness
less than 0.5 mm by agreement between the parties concerned.
3. SYMBOLS AND DESIGNATIONS
~
Number Symbol Designation
1 a Thickness of test piece
2 Side, width or diameter of test piece
Bore diameter of die
3
Bore diameter of retaining ring
4
5 External diameter of die
6 External diameter of retaining ring
7 Corner radius of interior of die
8 Corner radius of exterior of die
9 Corner radius of exterior of retaining ring
10 Depth of bore of die
11 Thickness of die
12 Thickness of retaining ring
13 d Diameter of spherical end of penetrator
14 Depth of cup
-
IE Cupping number
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IS0 / R 149 - 1960 (E)
90 min.
a
0 55 f 0.7
i-01
I mI I9
0 55 f 0.1
e
FIGuRE.-Cupping test.
4. TESTING MACHINE
The die, the retaining ring and the penetrator should be sufficiently rigid not to deform
4.1
appreciably during the test.
4.1 .I The penetrator should not turn during the test.
4. I. 2 The construction of the machine should be such that it is possible to determine accurately
the moment when rupture commences.
4.1.3 The surfaces of the retaining ring and of the die in contact with the test piece should
be plane, polished and parallel to each other and pe
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