ASTM-A921 Complete Document History
Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, for Subsequent Hot Forging

Complete Current Edition:
   1993 R16 EDITION - REAPPROVED IN 2016 - Sept. 1, 2016

Obsolete Revision Information:
   1993 R11 EDITION - REAPPROVED IN 2011 - June 15, 2011
   1993 R05 EDITION - REAPPROVED IN 2005 - March 1, 2005
   1993 R99 EDITION - REAPPROVED IN 1999 - Dec. 15, 1993