Crow Brand TUFNOL

A low cost general purpose grade for mechanical applications.

Crow Brand TUFNOL is a coarse weave grade for mechanical applications, where tough, rugged components are needed.  It has excellent impact strength with good general toughness and wear resistance.  It is suitable for electrical insulation at low voltages.

What is Crow Brand used for?

Crow Brand is used for mechanical applications and general uses, particularly for large components, or where fine surface finish is not a prime requirement, e.g. for large gears, jigs, wearing components, large rollers, impact blocks and many heavy duty components.

TYPES AVAILABLE

Crow Brand TUFNOL

Types available.	Sheets	Rods	Tubes	Other sections
Natural colour Crow Brand	Yes	Yes	Yes	Use Whale Brand
Graphite-impregnated Crow Brand	Yes*	Yes*	Yes*

 * Minimum order quantities may apply.

 Click here for Crow Brand TUFNOL STANDARD SIZES

SPECIFICATIONS for Crow Brand TUFNOL

BRITISH STANDARDS	Current Standards	Recent Standards (now obsolete)
Sheet	BS EN 60893-3-4 Type PF CC 201	BS 2572 Type F3
Round Rod	BS EN 61212-3-3 Type PF CC 43	BS 6128 Part 2 Type PF CC 25
Rectangular Bar	BS 6128 Part 4 Type PF CC 45
Hexagon Bar	BS 6128 Part 6 Type PF CC 65
Round Tube	BS EN 61212-3-2 Type PF CC 34	BS 6128 Part 9 Type PF CC 94
Rectangular Tube	BS 6128 Part 13 Type PF CC 134
NEMA*
Sheet	NEMA LI-1-1983 Type C

*Testing and certification to these standards is subject to special enquiry.   Standard quality testing is to British Standards.

PHYSICAL PROPERTIES

Crow Brand TUFNOL Sheet

PROPERTY	TYPICAL RESULT	UNITS
Cross breaking strength	130	MPa
Impact strength, notched, Charpy	13.5	kJ/m2
Compressive strength, flatwise	315	MPa
Compressive strength, edgewise	185	MPa
Shear strength, flatwise	90	MPa
Tensile strength	68	MPa
Young's modulus	6.3	GPa
Water Absorption
- 1.6mm thk.	100	mg
- 3mm thk.	120	mg
- 6mm thk.	145	mg
- 12mm thk.	175	mg
Electric strength, flatwise in oil at 90ºC
- 1.6mm thk.	3.5	MV/m
- 3mm thk.	2.3	MV/m
- 6mm thk.	1.8	MV/m
Electric strength, edgewise in oil at 90ºC	10	kV
Insulation resistance after immersion in water	1x108	ohms
Relative density	1.36	-
Maximum working temperature**
- continuous	120	ºC
- intermittent	130	ºC
Thermal classification	Class E	-
Thermal conductivity through laminae	0.35	W/(mK)
Thermal expansion in plane of laminae	2.2	X 10-5/ K
Specific heat	1.5	kJ/(kgK)

Test methods as BS EN 60893-2, where applicable.

Crow Brand TUFNOL Round Tube

PROPERTY	TYPICAL RESULT	UNITS
Axial compressive strength	160	MPa
Cohesion between layers	120	MPa
Water absorption	3.6	mg/cm2
Insulation resistance after immersion in water	6x106	ohms
Relative density	1.35	-

Test methods as BS EN 61212-2, where applicable.

Crow Brand TUFNOL Round Rod

PROPERTY	TYPICAL RESULT	UNITS
Flexural strength	130	MPa
Water absorption	3.8	mg/cm2
Insulation resistance after immersion in water	6x106	ohms
Axial electric strength in oil at 90ºC	3	kV
Relative density	1.35	-

Test methods as BS EN 61212-2, where applicable.

**Users of highly stressed components at temperatures approaching the maximum are recommended to seek further advice from Tufnol Composites Ltd.

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A full machining service is available from Tufnol for this and many other engineering plastics and composites.

Tufnol Composites Ltd, Wellhead Lane, Perry Barr, Birmingham B42 2TB, United Kingdom.

Quality Registration BS EN ISO 9001:2000, BS EN 9100:2003 and AS 9100 Reg. No. FM 90942

The information given here is believed to be correct, but completeness and accuracy are not guaranteed. The user shall be fully responsible for determining the suitability of products for the intended use.