Standard Practice for
Determining Resistance of Synthetic Polymeric Materials to
This standard is issued beneath the fixed designation g 21; the wide variety right away following the designation indicates the year of unique
adoption or, inside the case of revision, the 12 months of final revision. more than a few in parentheses suggests the 12 months of remaining reapproval. a superscript
epsilon (e) suggests a piece of writing trade since the final revision or reapproval.
click below to download Astm G 21 – 96 (Reapproved 2002) pdf free
click here to download Astm G 20 – 88 (Reapproved 2002) pdf free