ASTM-B661 Complete Document History
Standard Practice for Heat Treatment of Magnesium Alloys

Complete Current Edition:
   2012 R20 EDITION - REAPPROVED IN 2020 - Dec. 2, 2020

Obsolete Revision Information:
   2012 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - Oct. 15, 2012
   2006 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - March 1, 2006
   2003 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - April 10, 2003
   1999 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - May 10, 1999
   1993 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - Feb. 15, 1993
   DOD ADOPTION - FYI ONLY: DOD ADOPTED - Nov. 5, 1991
   1991 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - Feb. 22, 1991
   1990 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - Feb. 23, 1990
   1987 EDITION - Standard Practice for Heat Treatment of Magnesium Alloys - April 24, 1987