TY - RPRT TI - Assessing the quality of as-received 4340 steel for the production of NIST Charpy reference specimens AU - Lucon, Enrico AU - Martin, May PY - 2021 PB - National Institute of Standards and Technology (U.S.) CY - Gaithersburg, MD SN - NIST TN 2177 DO - 10.6028/NIST.TN.2177 ER -