TY - RPRT TI - Impact Characterization of 4340 and T200 Steels by Means of Standard, Sub Size and Miniaturized Charpy Specimens AU - Lucon, Enrico AU - McCowan, Christopher N. AU - Santoyo, Raymond L. PY - 2015 PB - National Institute of Standards and Technology SN - NIST TN 1858 DO - 10.6028/NIST.TN.1858 ER -