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Charpy Interlaboratory Comparison Between NIST and Anand Testing Machine Services



Enrico Lucon, Raymond L. Santoyo


Results are reported of an Interlaboratory Comparison between NIST (National Institute of Standards and Technology, Boulder, Colorado, USA) and ATMS (Anand Technical Machine Services, Kabnur, India). The study consisted in testing in both locations certified Charpy reference specimens produced by both Institutes, corresponding to four different absorbed energy levels (18 J, 60 J, 108 J, and 150 J). Besides directly comparing test results obtained with the same machine configuration (C-type hammer and 2 mm striker), the use of a different hammer (U-type) and striker type (8 mm) at NIST allowed to get some insight in the influence of hammer and striker types on Charpy test results.
Technical Note (NIST TN) - 2243
Report Number


Certified Charpy reference specimens, Charpy hammer type, Charpy striker type, Interlaboratory Comparison


Lucon, E. and Santoyo, R. (2022), Charpy Interlaboratory Comparison Between NIST and Anand Testing Machine Services, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed April 17, 2024)
Created December 12, 2022, Updated December 13, 2022