ASTM E 2248-13 Standard Test Method for Impact Testing of Miniaturized Charpy V-Notch Specimens

Publisher: ASTM
Publish Date: 2013
Pages: 6
Language: English
Format: PDF
Size: 143 kBScope1.1 This test method describes notched-bar impact testing of
metallic materials using Miniaturized Charpy V-Notch
(MCVN) specimens and test apparatus. It provides: (a) a
description of the apparatus, (b) requirements for inspection
and calibration, (c) safety precautions, (d) sampling, (e) dimensions
and preparation of specimens, (f) testing procedures, and
(g) precision and bias.1.2 This standard concerns Miniaturized Charpy V-Notch
specimens, for which all linear dimensions, including length
and notch depth, are reduced with respect to a type A standard
impact test specimen in accordance with Test Methods E23.
These are not the same as sub-size specimens, described in
Annex A3 of Test Methods E23, for which length, notch angle
and notch depth are the same as for the standard type A Charpy
specimen. See also 1.5 below.1.3 Comparison of the MCVN data with conventional
Charpy V-Notch (CVN) data or application of the MCVN data,
or both, to the evaluation of ferritic material behavior is the
responsibility of the user of this test method and is not
explicitly covered by this test method.1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
standard.1.5 This standard does not address testing of sub-size
specimens as discussed in Test Methods E
23. The reader
should understand the distinction between miniature and subsize.
Miniature specimens are shorter that sub-size specimens
so that more tests can be conducted per unit volume of
material. Moreover, miniature specimens are designed so that
the stress fields which control fracture are similar to those of
conventional Test Methods E23 specimens.1.6 The MCVN test may be performed using a typical Test
Methods E23 test machine with suitably modified anvils and
striker or using a smaller capacity machine.1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate
safety and health practices and determine the applicability
of regulatory limitations prior to use.