Elastomer Guide 1

Common Name
Base Polymer		 Chemical Name Material Designation (ASTM D-2000,
SAE J 200 Classification)		 ASTM D7-35, SAE J-14 & MIL-R-3065 (MIL-Std-417) ASTM
D-1418
Designation

Tensile Strength

(PSI)
Pure Gum

 Black Loaded Stocks Hardness Range (Durometer A) Specific Gravity (Base Material) Adhesion
to
Metals		 Adhesion
to
Fabrics		 Tear Resistance Abrasion Resistance
Natural Rubber Polyisoprene AA R(N) NR Over
3000		 Over
3000		 30-90 0.93 E E VG E
SBR or GR-S
or Buna S		 Styrene
Butadiene		 AA R(S) SBR Below
1000		 Over
2000		 40-90 0.94 E G F G-E
Butyl Isobutylene
Isoprene		 AA R(S) IIR Over
1500		 Over
2000		 40-75 0.92 G G G G
Butadiene Polybutadiene AA R(S) BR Below
1000		 Over
2500		 40-80 0.94 E G G E
EPDM or
EP Rubber		 Ethylene
Propylene		 BA,
CA, DA		 R(S) EPDM Below
1000		 Over
2000		 30-90 0.86 G G F G-E
Neoprene Chloroprene BC, BE SC CR Over
2000		 Over
2000		 15-95 1.23 E E G VG
CPE Chlorinated
Polyethylene		 BC,
BE, CE		 SC, SB CM Over
1500		 Over
2500		 60-90 1.16-1.32 F-G F F G
Nitrile or NBR
or Buna N		 Acrylonitrile
Butadiene		 BF, BG,
BK, CH		 SB, SA NBR Below
1000		 Over
2000		 40-95 1.00 E G F G
Urethane Polyester/
Ether Urethane		 BG SB AU, EU 3000
to
5000		 3000
to
5000		 30-75D 1.02-1.20 E VG E O
Hypalon Chlorosulfonated
Polyethylene		 CE SC CSM Over
1500		 Over
2500		 40-90 1.12 E G F VG
Epichlorohydrin
Rubber		 Polyalkylene
Oxide		 CH SB, SA CO/ECO Below
1000		 2500 40-90 1.27-1.36 F-G F-G F-G F-G
Acrylic Polyacrylate DF, DH TB ACM/ANM Below
1000		 2200 40-90 1.10 VG VG F F
Silicone Polysiloxane FC,
FE, GE		 TA PSi; PVSi,
Si, VSi		 Below
1200		 Over
1200		 20-85 1.14-2.05 E E P P
Fluorosilicone Fluoroalkyl
Polysiloxane		 FK TA, TB FVS Below
1500		 Over
1500		 60-90 1.30-2.20 E E P-F P
Fluorocarbon Fluorinated
Hydrocarbon		 HK TB FPM 1200 1500
to
3000		 60-90 1.8 F-G G F-G G
O=Outstanding, E=Excellent, VG=Very Good, F=Fair, P=Poor