Lucon, E.
and Eckhardt, A.
(2026),
Third Charpy Interlaboratory Comparison Between NIST and Anand Testing Machine Services LLP, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2376, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=962049 (Accessed May 8, 2026)
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Third Charpy Interlaboratory Comparison Between NIST and Anand Testing Machine Services LLP
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Abstract
This document reports the results of the third Charpy Interlaboratory Comparison between NIST (National Institute of Standards and Technology, Boulder, Colorado, USA) and ATMS (Anand Testing Machine Services LLP, Kabnur, India). The first and second comparisons were run in 2022 and 2024, respectively. Each laboratory tested Charpy reference specimens that were certified and produced at different energy levels by the two institutions. Test results obtained at NIST and ATMS were compared using the same machine configuration (C-type hammer) and striker type (2 mm), and statistical methods (unpaired two-sample t-test) were employed to assess the significance of interlaboratory differences.Citation
Technical Note (NIST TN) - 2376
Report Number
2376
NIST Pub Series
Pub Type
NIST Pubs
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Keywords
Absorbed energy, certified Charpy reference specimens, interlaboratory comparison, unpaired two-sample t-test.
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Created May 7, 2026