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Material Reference

Author : Date : 2013-8-2 23:16:31


 Material Reference
The chart below is intended to help in the material selection stage of designing rubber parts / products.
Rubber compounding is a very broad and technical field, since basic rubbers or elastomers are mixed
with various chemicals and ingredients (and even with each other) to obtain desired physical properties.
A wide variety of basic polymers (rubbers) are available, and a literally infinite array of compounds exhibiting
unique physical properties as well as chemical, fluid, and temperature resistances are possible.
This chart, therefore, deals only with very general features of the most common basic rubber
or elastomer compounds, but more specific information is available upon request.

Common
Name(s)

Designation (2)

Composition

Min/Max Temp Operating 

Range (F) (5)

Neoprene

CR

Chloroprene

-30 F / 212 F

EPDM

EPDM, EPM

Ethylene-propylene- diene; Ethylene-propylene

-40 F / 300 F

Buna-N

NBR

Nitrile-butadiene

-30 F / 250 F

Silicone

Q, Si

Polysiloxane

-80 F / 420 F

SBR

SBR

Styrene-butadiene

-20 F / 212F

Butyl

IIR

Isobutene-isoprene

-60 F / 250 F

Natural, Gum Rubber

NR

Isoprene, natural

-60 F / 220 F

Hypalon (4)

CSM

Chloro-sulfonyl- polyethylene

-40 F / 320 F

Urethane

AU, EU

Polyethylene-apdate, Poly (oxy-1, 4, butylene) ether

-40 F / 175 F

Viton ® (4), Fluoro-elastomer

FPM

Hexaflouropropylene- vinylidene fluoride

- 10 F / 400 F

Fluoro-silicone

FSi

Fluorocarbon

-60 F / 350 F

Hydrogenated Nitrile

HNBR

Hydrogenated Acrylonitrile-butadiene rubber

-22 F / 300 F

Carboxylated Nitrile

XNBR

Carboxylated Nitrile

-20 F / 250 F



Designation (2)

General Properties(1)

CR

Good Weathering Resistance. Flame retarding. Moderate resistance to petroleum-based fluids.

EPDM, EPM

Excellent ozone, chemical, and aging resistance. Poor resistance to petroleum-based fluids.

NBR

Excellent resistance to petroleum-based fluids. Good physical properties.

Q, Si

Excellent high and low temperature properties. Fair physical properties.

SBR

Good physical properties and abrasion resistance. Poor resistance to petroleum-based fluids.

IIR

Very good weathering resistance. Excellent dielectric properties. 

Low permeability to air. Good physical properties. Poor resistance to petroleum-based fluids.

NR

Excellent physical properties including abrasion and low temperature resistance. 

Poor resistance to petroleum-based fluids.

CSM

Excellent ozone, weathering, and acid resistance. Good and abrasion and heat resistance. 

Fair resistance to petroleum-based fluids.

AU, EU

Good aging and excellent abrasion, tear, and solvent resistance. Poor high temperature properties.

FPM

Excellent oil and air resistance both at low and high temperatures. Very good chemical resistance.

FSi

Offers superior heat resistance. resistant to cold, oils and solvents of fluorinated rubber. 

Good for special applications where general resistance to oxidizing chemicals, 

aromatic and chlorinated solvent bases are required.

Narrower Temp range than silicone but better fluid resistance

HNBR

Excellent heat and oil resistance, improved fuel and ozone resistance (approximately 5X) 

over Nitrile Good abrasion resistance. 

Decreased elasticity at low temperatures with hydrogenation over standard nitrile.

XNBR

Excellent Abrasion and Tear Resistance, Fair Ozone and Steam Resistance. 

Poor to Fair Sunlight and Outdoors. Good to Excellent Oil Resistance.



Designation (2)

Resistant to:

CR

Moderate chemicals and acids, ozone, oils, fats, greases, many oils, and solvents.

EPDM, EPM

Animal and vegetable oils, ozone, strong and oxidizing chemicals.

NBR

Many hydrocarbons, fats, oils, greases, hydraulic fluids, chemicals.

Q, Si

Moderate or oxidizing chemicals, ozone, concentrated sodium hydroxide.

SBR

Most moderate chemicals, wet or dry, organic acids, alcohols, ketones, aldehydes.

IIR

Animal and vegetable fats, oils, greases, ozone, strong and oxidizing chemicals.

NR

Most moderate chemicals, wet or dry, organic acids, alcohols, ketones, aldehydes.

CSM

Similar to Neoprene with improved acid resistance.

AU, EU

Ozone, hydrocarbons, moderate chemicals, fats, oils, greases.

FPM

All aliphatic, aromatic and halogenated hydrocarbons, acids, animal and vegetable oils.

FSi

Moderate or oxidizing chemicals, ozone, aromatic chlorinated solvents, bases.

HNBR

Many hydrocarbons, transmission fluids, refrigerants, diluted acids, hydraulic fluids, 

silicone oils, vegetable and animal fats and oils, water and steam.

XNBR

Many hydrocarbons, fats, oils, greases, hydraulic fluids, chemicals.



Designation (2)

Attacked by:

CR

Strong oxidizing acids, esters, ketones, chlorinated, aromatic and nitro hydrocarbons.

EPDM, EPM

Mineral oils and solvents, aromatic hydrocarbons.

NBR

Ozone (except PVC blends), ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.

Q, Si

Many solvents, oils, concentrated acids, dilute sodium hydroxide.

SBR

Ozone, strong acids, fats, oils, greases, most hydrocarbons.

IIR

Petroleum, solvents, coal tar solvents, aromatic hydrocarbons.

NR

Ozone, strong acids, fats, oils, greases, most hydrocarbons.

CSM

Concentrated oxidizing acids, esters, ketones, chlorinated, aromatic, and nitro hydrocarbons.

AU, EU

Concentrated acids, ketones, esters, chlorinated and nitro hydrocarbons.

FPM

Ketones, low molecular weight esters and nitro containing compounds.

FSi

Brake fluids, hydrazine, ketones.

HNBR

Chlorated hydrocarbons, keytones, strong acids.

XNBR

Ozone (except PVC blends), ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.