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Ref. No.: IÇO/R 184 - 1961 (E)
IS0
FOR STAN DARD I ZAT I O N
I NTE R N AT1 O N A L ORGAN I ZATl O N
IS0 RECOMMENDATION
R 184
!.
3. .' . . .
BRINELL HARDNESS TEST FOR GREY CAST IRON
Is' EDITION
February 1961
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 184, Brinell Hardness Test for Grey Cast Iron, was drawn
up by Technical Committee ISO/TC 25, Cast Iron, the Secretariat of which is held by the British
Standards Institution (B.S.I.).
Work on this matter which the Technical Committee had already begun in 1955, came
to an end in 1959, with the adoption of a proposal as a Draft IS0 Recommendation.
On 12 June 1959, the Draft IS0 Recommendation (No. 286) was distributed to all the
IS0 Member Bodies and was approved by the following Member Bodies:
Greece Romania
Belgium
Burma Hungary Spain
Chile India Sweden
Italy Switzerland
Czechoslovakia
Netherlands United Kingdom
Denmark
Finland New Zealand U.S.A.
France Norway
Germany Portugal
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 February 1961, to accept it as an IS0 RECOMMENDATION.
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ISO/R 184 - 1961 (E)
IS0 Recommendation R 184 February 1961
BRINELL HARDNESS TEST FOR GREY CAST IRON
1. SCOPE
This IS0 Recommendation refers exclusively to the determination of Brinell hardness of grey
cast iron, and not to the determination of hardness of chilled cast iron or of grey cast iron
which has been surface-hardened, since these properties only concern specialized foundries.
2. PRINCIPLE OF TEST
The test consists in forcing a steel ball of diameter D, under a load F, into the test piece and
measuring the diameter d of the indentation left in the surface after removal of the load.
The Brinell hardness HB is the quotient of the test load F (expressed in kilogrammes-force) by
the curved surface area of the indentation (expressed in square millimetres) which is assumed
to be spherical and of diameter D.
3. SYMBOLS AND DESIGNATIONS
Designation
Number Symbol
D Diameter of the ball, in millimetres
F Test load, in kilogrammes-force
d Diameter of indentation, in millimetres
HB Brinell hardness
test load
-
_-
surface area of indentation (considered as a portion of a
sphere)
2F
-
-
~~
.n D (D - i D2 - d2)
I n
-5-
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ISO/R 184 - 1961 (E)
Nom
The Brinell hardness is denoted by the symbol HB for standard test conditions, i.e. :
ball diameter 10 mm
load
3000 kgf
duration of loading 15 S
For other conditions, the symbol HB is supplemented by an index indicating the test conditions in the follow-
ing order:
diameter of baii,
load,
duration of loading.
Example: HB 5/750/15 = Brinell hardness
measur
...