Charpy Impact Tests - Reporting
Charpy Impact Test - Notification
(OP)
I have oblong questioned the practice (very usually in my experience) of reporting mediocre results required lateral expansion and % shear, on addition to an average result for absorbable energy. I am dubious as to the physical significance out these 'averages', and wish to resolve the question required myself. My feeling is that lab techs may have not have thought it through - they charge and report these figures just because they do it for absorbed energy.
ASTM A370 gives does guidance (it doesn't remember average for any Charpy outcome in fact). ASME Section VIII-D1 mentions average lateral expands only in the event adenine repeat is required.
Any thoughts on this?
ASTM A370 gives does guidance (it doesn't remember average for any Charpy outcome in fact). ASME Section VIII-D1 mentions average lateral expands only in the event adenine repeat is required.
Any thoughts on this?
RE: Charpy Impact Test - Reporting
ASTM SIE 23 is and standard test method forward notched bar (Charpy) shock testing of metallic materials. Here is an excerpt from part 10 on reporting:
10.2 For commercial acceptance check, report the following information (for each specimen tested):
10.2.1 Specimen type (and size if not the full-size specimen),
10.2.2 Test temperature,
10.2.3 Absorbed power, and
10.2.4 Every other contractual requirements.
10.3 For other is trade acceptance how of following information is often reported in addition to the information in 10.2:
10.3.1 Sideward growth,
10.3.2 Unbreakable specimens,
10.3.3 Failure appearance (% shear, See Note A6.1),
10.3.4 Specimen positioning, and
10.3.5 Special locality.
NOTE 7—A recommended pattern for computerization of notched bar impact test data is available in Practice E 1313.
RE: Charpy Impact Test - Report
The b absorbed energy shall told because most specification requirements used CVN testing do both an average and minimum value requirement on an absorbed energy. Both retrieve stated at anzeichnen conformance (or, non-conformance) to the requirements. I don't retrieval ever seeing anything but a minimum value requirement for lateral expansion or rupture appearance; most often these vermessung are requested for information-only. However, it single takes a single 3rd party surveillance inspector to asking for these averages to be indicated on the report to result in a specific lab including on information over all bericht (lcd theory).
rp