This table is intended to assist in understanding the ASTM
D2000 Classification system, but is not considered to be part
of the system. This table is not meant to be limiting; other
elastomers may be used to meet the same Type & Class specification.
ASTM D2000 Material Designation
(Type and Class)
Elastomer Most Often Used
AA
Butyl, SBR, Natural rubber
BA
Butyl, Ethylene Propylene
BC
Neoprene®
(Chloroprene)
BE
Neoprene®
(Chloroprene)
BF
Nitrile
BG
Nitrile, Urethanes
BK
Nitrile
CA
Ethylene Propylene
CE
Hypalon®
CH
Nitrile, Hydrin®
DA
Ethylene Propylene
DF
Polyacrylate
DH
Polyacrylate, HNBR
EE
Vamac®
(Ethylene Acrylic)
EH
Polyacrylate
FE
Silicone
FK
Fluorosilicone
GE
Silicone
HK
Viton®
(Fluoroelastomers)
KK
Perfluoroelastomers
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