Chemical and physical properties of elastomers

International Shortform Name	NR	SBR	IIR	EPDM/ EPM
Hardness Range (Sh A)	35-95	40-95	40-85	25-85
Tensile Strength (N/mm²)	30	25	20	20
Elongation at Break	800	450	700	450
Heat Resistance ° C	-50 +80	-40 +100	-40 +130	-40 +150
Abrasion Resistance	++	++	0	+
Tear Resistance	++	+	+	++
Elasticity	++	+	-	+
Flexural Crack Resist.	+	+	0	++
Oxidation Resistance	0	+	++	++
Weathering Resistance	-	-	++	++
Resistance (steam)	0	+	++	++
Oil/Grease Resistance	-	-	-	-
Fuel Resistance	-	-	-	-
Chem. Resist.: Acids	+	+	++	++
Chem. Resist.: Bases	+	+	++	+

 

 

International Shortform Name	CR	CSM	NBR	HNBR
Hardness Range (Sh A)	30-90	45-95	30-95	40-90
Tensile Strength (N/mm²)	20	18	25	25
Elongation at Break	450	300	500	500
Heat Resistance ° C	-35 +110	-30 +120	-35 +120	-30 +150
Abrasion Resistance	+	+	+	++
Tear Resistance	+	0	+	+
Elasticity	+	0	+	+
Flexural Crack Resist.	++	++	0	++
Oxidation Resistance	+	++	0	+
Weathering Resistance	++	++	0	++
Resistance (steam)	++	+	+	++
Oil/Grease Resistance	+	+	++	++
Fuel Resistance	0	0	++	+
Chem. Resist.: Acids	+	++	0	0
Chem. Resist.: Bases	+	++	0	+

 

 

International Shortform Name	PUR	SI/MVQ	FVMQ	FPM/ FKM
Hardness Range (Sh A)	55-95	30-85	30-85	50-90
Tensile Strength (N/mm²)	30	8	8	20
Elongation at Break	600	250	200	400
Heat Resistance ° C	-30 +85	-70 +200	-55 +180	-30 +220
Abrasion Resistance	++	-	-	0
Tear Resistance	++	-	-	0
Elasticity	+	+	-	-
Flexural Crack Resist.	0	-	-	+
Oxidation Resistance	+	++	++	++
Weathering Resistance	0	++	++	++
Resistance (steam)	-	-	-	++
Oil/Grease Resistance	++	+	++	++
Fuel Resistance	++	-	+	++
Chem. Resist.: Acids	-	-	-	++
Chem. Resist.: Bases	-	-	-	++

Legend

++	+	o	-
very good	good	fair	poor, unsatisfactory

 

Information presented herein has been compiled from sources considered to be dependable and is reliable to the best of our knowledge and belief but is not guaranteed to be so.