appendix 3
astm grade
type and class
most common
polymer
AA. ...........................................Natural, SBR, Buty
BA. .....................................................EPDM, Butyl
BC.......................................................... Neoprene
BE.......................................................... Neoprene
BF. ................................................................Nitrile
BG.................................................................Nitrile
BK.................................................................Nitrile
CA................................................................EPDM
CE.............................................................Hypalon
CH.................................................................Nitrile
DA................................................................EPDM
DE.............................................................Hypalon
FC............................................................. Silicone
FE. ............................................................ Silicone
FK. ........................................Fluorinated Silicones
GE............................................................. Silicone
HK..................................................................Viton
A Line Call-Out (Or Specification)
shall contain:
EXAMPLE: 2BC507A14EO34
2.....................................................................
Grade Number
BC............................. Material designation (Type and Class)
507........................................
Hardness and Tensile Strength
-
First digit “5” is Durometer - i.e. 50 Duro
-
Second and third digits are Tensile - i.e. 700
SUFFIX REQUIREMENTS A14, EO34, Etc.
A...................................................................Heat Resistance
1.............................................................................. 70
Hours
4...................................................................................100
°C
EO............................. Fluid Resistance (Oils and Lubricants)
3...................................................................#3
Oil, 70 Hours
4...................................................................................100
°C
SUFFIX LETTERS
A...................................................Heat Resistance
B................................................. Compression Set
C. ...........................Ozone or Weather Resistance
D. ................Compression - Deflection Resistance
EO............. Fluid Resistance (Oils and Lubricants)
F.............................. Low Temperature Resistance
G.................................................. Tear Resistance
H. ................................................. Flex Resistance
J............................................ Abrasion Resistance
K.............................................................. Adhesion
L................................... Aqueous Fluid Resistance
M..................................... Flammability Resistance
N. ............................................. Impact Resistance
P............................................. Staining Resistance
R. .......................................................... Resilience
Z..................................Any Special Requirements,
..............................
wich shall be specified in detail
Classifications
Temperature
OIL SWELL
(
Volume Swell, Max. %)
a...................70°C A. ...............No Requirement
B.................100°C B.................................... 140
C. ...............125°C C.................................... 120
D. ...............150°C D.................................... 100
E.................175°C E...................................... 80
F.................200°C F. ..................................... 60
G................225°C G...................................... 40
H. ...............250°C H...................................... 30
J.................275°C J....................................... 20
.
K...................................... 10
7069-
E (04-03-2011)