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O-rings

     ASTM Compound Conversion Keys

Natural and Synthetic Rubber Compounds Identification

 

Prefix-Type

1st Number
"A" Durometer
Hardness

Next 2 Numbers
Tensile Strength

Suffix - Characteristics

RN - Natural Rubber

3=30±5

05=500

A - Heat Aging

H - Flexing

S - Synthetic non-oil resistance
Usually GRS

4=40±5

10=1000

B - Compression set

J - Abrasion

SA - Very low oil swell
Usually Thinkol

5=50±5

15=1500

C - Weather resistance

K - Adhesion

SB - Low oil swell
Usually Buna N

6=60±5

20=2000

D - Load deflection

L - Moisture absorption

SC - Medium oil swell
Usually Neoprene

7=70±5

25=2500

E - Oil immersion

M - Flame resistance

TA - Heat and cold resistance

8=8±5

30=3000

F1 or F
-40ºF cold

N - Impact
P - Staining

TB - Heat and oil resistance
Usually Polyacrylate

9=90±5

35=3500

F2 or FF
-60ºF cold
G-Tear

R - Resilience
Z - Special requirements
as noted

     Conversion to ASTM D735 D-SAE J114 TO ASTM          D2000-SAE J200

Equivalents for Conversion

 

ASTM D735-SAE J14
Material Designation
(Type and Class)

ASTM D2000-SAE J200
Material Designation
(Type and Class)

Type of Polymer Normally Used

R
R
SC
...
...
SB
SA
...
...
...
...
TB
TA
...
...
TA
...
AA
BA
BC
BE
BF
BG
BK
CA
CE
CH
DF
DH
FC
FE
FK
GE
HK
Natural rubber, reclaimed rubber, SBR butyl
High temperature SBR and butyl compounds
Cloroprene polymers (neoprene)
Cloroprene polymers (neoprene)
NBR polymers
NBR polymers, urethanes
Organic dihalide polymers (Thickol), NBR
Ethyl propylene
Chlorosulfonated polyethylene (Hypalon)
NBR Polymers
Polyacrylic (butyl-acrylate type)
Polyacrylic polymers
Silicones (high strength)
Silicones
Fluorinated silicones
Silicones
Fluorinated elastomers (Viton)

Conversion of Suffix Letters

 

ASTM D735-
SAE J14

ASTM D2000-
SAE J200

 

ASTM D735-
SAE J14

ASTM D2000-
SAE J200

A1
B
C
D
E1
E3
F1
F2
G

A14
B13, B14, B36, or B17
C20
D11
E14 or E16
E34 or E36
F17
F19
G11 orG21

  H
K1
K2
L
M
N
P
R
Z
H
K11
K31
L14
N
N
P
R
Z

Please see below for a list of helpful o-ring specific information.

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