IS 17416 : 2024/ISO 14556 : 2023 Metallic Materials - Charpy V-Notch Pendulum Impact Test - Instrumented Test Method
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical to ISO 14556 : 2023 'Metallic materials - Charpy V-notch pendulum impact test - Instrumented test method' issued by the International Organization for Standardization (ISO), was adopted by the Bureau of Indian Standards on the recommendation of Mechanical Testing of Metals Sectional Committee and approval of the Metallurgical Engineering Division Council.
This standard was first published in 2020. This revision has been undertaken to align with the latest version ISO 14556 : 2023 to harmonize it with the latest developments that have taken place at international level.
The main changes compared to the previous edition are as follows:
a) In 1, a sentence was added to state that results shall not be directly used in design calculations;
b) In 4, the symbol Kp (potential energy of the pendulum hammer) was added; the symbol KV (absorbed energy) was changed to KV;
c) In 6.1 and D.2.1, the application of the “dynamic force adjustment” was added;
d) In 6.2.3, a generic statement about the stiffness of the support block was removed;
e) In 6.2.5, the possibility of directly determining characteristic values from printed graphs was removed;
f) In 7 and 8, statements referring to Annex D when testing miniature test pieces were added;
g) In 9.2, the characteristic values of force that can be evaluated from curves of Type A and B were changed;
h) In 9.3, it is now specified that Fm is determined after general yield;
j) in Figure 2, force-displacement curves in columns 3 (actual recording) were replaced with better-quality ones;
k) In 10, a requirement to report the type of test piece (standard, subsize, or miniature) was added;
m) In Annex A, it was clarified that those shown are examples of instrumented strikers;
n) In Annex D, alternative miniature test pieces were removed;
p) In D.2.1, the deviation range between Wt and KV was changed from ± 0.5 J to ± 10 % of KV;
q) In D.3.1, dimensions for the standard miniature test piece were added; test temperature requirements were removed; the test report section was removed; and
r) In the bibliography, a new reference, [8], was added.
The text of ISO standard has been approved as suitable for publication as in Indian Standard without deviations. Certain terminologies and conventions are, however, not identical with those used in Indian Standard. Attention is especially drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, it should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker.