Designation: E 208 – 06Standard Test Method forConducting Drop-Weight Test to Determine Nil-DuctilityTransition Temperature of Ferritic Steels1This standard is issued under the fixed designation E 208; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.INTRODUCTIONThis drop-weight test was developed at the Naval Research Laboratory in 1952 and has been usedextensively to investigate the conditions required for initiation of brittle fractures in structural steels.Drop-weight test facilities have been established at several Naval activities, research institutions, andindustrial organizations in this country and abroad. The method is used for specification purposes byindustrial organizations and is referenced in several ASTM specifications and the ASME Boiler andPressure Vessel Code. This procedure was prepared to ensure that tests conducted at all locationswould have a common meaning. This test method was originally published as Department of the Navydocument NAVSHIPS-250-634-3.1. Scope*1.1 This test method covers the determination of the nil-ductility transition (NDT) temperature of ferritic steels, 5⁄8 in.(15.9 mm) and thicker.1.2 This test method may be used whenever the inquiry,contract, order, or specification states that the steels are subjectto fracture toughness requirements as determined by thedrop-weight test.1.3 The values stated in inch-pound units are to be regardedas the standard.1.4 This ...
