Material Properties Chart

Material properties charts should be used as general guidelines. For specific applications, please contact Utex technical services.

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Materials Duro

Duro

Typical durometer ASTM D22540

Hi T

Hi T

Maximum Operating Temp

Low T

Low T

Minimum Operating Temp

SpGr

SpGr

Specific Gravity

Uten

Uten

Ultimate Tensile Strength

Ueln

Ueln

Ultimate Elongation ASTM D412

Tear

Tear

Tear Resistance ASTM D624 (Die "C")

ModE

ModE

Modulus of Elongation at 100% ASTM D412

Oil

Oil

Oil Immersion Volume Change 70 hrs at 212F ASTM D471

Comp

Comp

Compression Set 70 hrs @ 212F (*70hrs @ 392) ASTM D395

Cost

Cost

Relative cost

FFKM (Black Chemtex®)

FFKM (Black Chemtex®)

OVERVIEW

Proprietary alloy of perfluorinated elastomer polymer with a filler system to provide exceptional chemical resistance.

Applications

High temperatures seals, high reliability

70-90 600 -58 1.95-2.07 2200 80-160 100-170 - - 8-17* $$$$$
CR (Neoprene)

CR (Neoprene)

OVERVIEW

Neoprene, the homopolymer of chloroprene, is a molded rubber and one of the first substitutes for natural rubber. It has excellent weathering characteristics.

Applications

wetsuits, wire sleeves, weather stripping

64-90 230 -35 1.36-1.4 1950-2200 100-380 150-240 400-1600 +38-+74 60-70 $
EPDM

EPDM

OVERVIEW

Ethylene propylene diene rubber is a copolymer of three parts used in sealing with hydraulic fluids within a generous temperature range.

Applications

automotive brake system seals, drive belts, door insulation

70-90 500 -30 1.17 1350-1500 250-400 200-223 420-950 - 72-90 $
TFE/P (aflas)

TFE/P (aflas)

OVERVIEW

Tetrafluoroethylene (FEPM) has excellent chemical resistance and retains physical properties up to high temperatures.

Applications

leader for sour application sealing

70-90 450 25 1.55 1875 120-210 130-160 640-1800 +5.3-+6 40-60* $$$
FKM (viton)

FKM (viton)

OVERVIEW

Fluorocarbon combines high temperature resistance with chemical resistance. Because of its ability to hold up in harsh environments, it is commonly used for extreme sealing (aerospace).

Applications

Industrial sealing with high temperature, food industries

70-90 400 -40 1.84 1225-1425 130-180 90-150 650-1175 +1 30-35* $$$
HNBR (Hydrogenated Nitrile)

HNBR (Hydrogenated Nitrile)

OVERVIEW

Hydrogenated nitrile is excellent for use with corrosion inhibitors and ultraviolet light.

Applications

O-rings, low cost packing elements

62-90 300 -40 1.21-1.31 2400-3175 140-260 170-228 485-2075 -8-+8.4 12 $$
NR

NR

OVERVIEW

Natural rubber is the vulcanized latex of the rubber tree. It is the cheapest rubber and has poor resistance to hydrocarbons.

Applications

tires, sugical gloves, conveyor belts

60-90 - - 1.21-1.23 1850-2498 315-514 212-369 233-1000 - 56-82 $
NBR (nitrile)

NBR (nitrile)

OVERVIEW

Molded, General service, excellent resistance to hydrocarbons, sulfur cured

Applications

Widely used for oil and gas seals, protective gloves

75-93 270 -20 1.2-1.33 2225-2800 110-460 180-220 440-2025 -2-+1 25-30 $
  • FFKM (Black Chemtex®)
    Duro
    70-90
    Hi T
    600
    Low T
    -58
    SpGr
    1.95-2.07
    Uten
    2200
    Ueln
    80-160
    Tear
    100-170
    ModE
    -
    Oil
    -
    Comp
    8-17*
    Cost
    $$$$$
  • CR (Neoprene)
    Duro
    64-90
    Hi T
    230
    Low T
    -35
    SpGr
    1.36-1.4
    Uten
    1950-2200
    Ueln
    100-380
    Tear
    150-240
    ModE
    400-1600
    Oil
    +38-+74
    Comp
    60-70
    Cost
    $
  • EPDM
    Duro
    70-90
    Hi T
    500
    Low T
    -30
    SpGr
    1.17
    Uten
    1350-1500
    Ueln
    250-400
    Tear
    200-223
    ModE
    420-950
    Oil
    -
    Comp
    72-90
    Cost
    $
  • TFE/P (aflas)
    Duro
    70-90
    Hi T
    450
    Low T
    25
    SpGr
    1.55
    Uten
    1875
    Ueln
    120-210
    Tear
    130-160
    ModE
    640-1800
    Oil
    +5.3-+6
    Comp
    40-60*
    Cost
    $$$
  • FKM (viton)
    Duro
    70-90
    Hi T
    400
    Low T
    -40
    SpGr
    1.84
    Uten
    1225-1425
    Ueln
    130-180
    Tear
    90-150
    ModE
    650-1175
    Oil
    +1
    Comp
    30-35*
    Cost
    $$$
  • HNBR (Hydrogenated Nitrile)
    Duro
    62-90
    Hi T
    300
    Low T
    -40
    SpGr
    1.21-1.31
    Uten
    2400-3175
    Ueln
    140-260
    Tear
    170-228
    ModE
    485-2075
    Oil
    -8-+8.4
    Comp
    12
    Cost
    $$
  • NR
    Duro
    60-90
    Hi T
    -
    Low T
    -
    SpGr
    1.21-1.23
    Uten
    1850-2498
    Ueln
    315-514
    Tear
    212-369
    ModE
    233-1000
    Oil
    -
    Comp
    56-82
    Cost
    $
  • NBR (nitrile)
    Duro
    75-93
    Hi T
    270
    Low T
    -20
    SpGr
    1.2-1.33
    Uten
    2225-2800
    Ueln
    110-460
    Tear
    180-220
    ModE
    440-2025
    Oil
    -2-+1
    Comp
    25-30
    Cost
    $
Duro – Typical durometer ASTM D22540 Shore A
Hi T – Maximum Operating Temp °F
Low T – Minimum Operating Temp °F
SpGr – Specific Gravity
Uten – Ultimate Tensile Strength PSI
Ueln – Ultimate Elongation ASTM D412 %
Tear – Tear Resistance ASTM D624 (Die “C”) lb/in
ModE – Modulus of Elongation at 100% ASTM D412 %
Oil – Oil Immersion Volume Change 70 hrs at 212F ASTM D471 %
Comp – Compression Set 70 hrs @ 212F (*70hrs @ 392) ASTM D395 %
Cost – Relative Cost $-$$$$

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