Feroform
The Feroform range of materials has been developed by Tenmat to offer the design engineer the chance of replacing metal-based materials with unique, non-asbestos, wearing and bearing composites capable of duplicating and, in some cases, exceeding the performance of asbestos composites. Feroform materials possess strength, durability dimensional stability and excellent wear characteristics besides exhibiting good resistance to attack by many chemicals.
The resins used have been selected for their good mechanical properties and high thermal and dimensional stability. Both organic and synthetic fibres employed for reinforcement of the resins have been selected from the many types available for their high modulus and stability in water and various chemicals.
The “F” Grade range is primarily used in dry applications whilst the “T” & “PR” Grades have been specifically designed with very low water and moisture absorption, making them ideal for use in submerged applications yet still suitable to use dry.
The addition of selected friction modifiers, such as PTFE, graphite and molybdenum disulphide, enhances the wear properties and life of the materials, enabling them to be operated at higher speeds and loads.
F21
Cured phenolic resin matrix carrying naturally occurring fibre and incorporating graphite evenly dispersed throughout the matrix for lower friction and improved wear properties. A general wearing and bearing grade, but not normally used for fully water-submerged applications. Feroform F21 has strength, durability, dimensional stability, low friction, and excellent wear characteristics. It is particularly useful in dirty and dusty environments.
F36
A specially developed grade for bearing and wearing applications at elevated temperatures up to 200 deg C, using high temperature phenolic resin encapsulating aramid composite textile reinforcement. It is perfectly suited to high temperature applications of mechanical load and wear. F363 is the same material with graphite impregnated to accommodate applications that require a lower co-efficient of friction.
T11
Cured phenolic resin with synthetic fibre and incorporating graphite evenly dispersed throughout the matrix. Specifically developed for water lubricated applications but can also operate dry with low friction and high load carrying attributes.
T12
Cured phenolic resin matrix carrying synthetic fibre and incorporating molybdenum disulphide evenly dispersed throughout the matrix for lower friction at high pressures when used dry. Can be considered for applications where dry start up can be a problem prior to full fluid lubrication. It has the ability to run both dry and wet with water lubrication making it extremely useful in marine applications where it is approved by all major classification societies for stern tube and rudder bearings.
T14
Cured phenolic resin matrix carrying synthetic fibre, but with no friction modifiers. Like T12, it is approved by all major marine classification societies. Used where electrolytic.
T814
Cured phenolic resin matrix carrying synthetic fibres and incorporating P.T.F.E. evenly dispersed throughout the matrix. This grade offers the lowest co-efficient of friction in the range yet does not sacrifice any load capability. Specially designed for hydro turbine bearings, but applications are endless.
F57
A cured phenolic resin matrix, reinforced with a specially engineered woven aramid fibre cloth specifically designed for the rotor vane industry. FEROFORM F57 is a high performance material that exhibits superb stability under vacuum, insensitivity to moisture, excellent strength retention, and low noise.
PR14
Using a polyester resin matrix reinforced with woven synthetic cloth makes PR14 a cost effective general purpose grade to complement the existing Feroform range. Whilst the PR14 does not contain any friction modifiers it is still suitable in applications of high load and can be submerged in water.
PR12
Like the PR14 grade but has molybdenum disulphide impregnated evenly throughout the material for lower co-efficient of friction. With high load and low friction properties, coupled with excellent wear performance make this grade ideal for larger equipment where greater working pressure and shock loads can be expected.
PR18
Impregnated with PTFE throughout its structure, PR18 has the lowest coefficient of friction of all Feroform PR grades, and this also helps minimize counterface material wear. This grade was once more commonly known as Railko RG22 but since Tenmat’s acquisition of the Railko company and to fit in with the existing Feroform range it has been rebranded as PR18. Designed in response to market demands for a cost effective solution to rudder bearing applications, Feroform PR18 is now approved by all the major marine classification societies.
Properties - Feroform T14
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
80 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
45 |
Compressive Strength |
MPa |
310 |
Shear Strength |
MPa |
85 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.13 |
Water Absorption @ 23 Deg C |
% |
0.2 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
100 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform T12
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
80 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
45 |
Compressive Strength |
MPa |
285 |
Shear Strength |
MPa |
75 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.08 |
Water Absorption @ 23 Deg C |
% |
0.3 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
100 |
Melting point |
ᵒC |
335 |
Thermal Conductivity |
W/m.ᵒC |
0.77 |
Dielectric Strength |
kV/mm |
0 |
Volume Resistivity |
Ω.cm |
10⁷ |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform T11
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
80 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
45 |
Compressive Strength |
MPa |
290 |
Shear Strength |
MPa |
60 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.09 |
Water Absorption @ 23 Deg C |
% |
0.3 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
100 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform PR18
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
90 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
40 |
Compressive Strength |
MPa |
300 |
Shear Strength |
MPa |
90 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.08 |
Water Absorption @ 23 Deg C |
% |
0.15 |
Service Temperature Intermittent |
ᵒC |
110 |
Service Temperature Continuous |
ᵒC |
100 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform PR14
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
90 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
38 |
Compressive Strength |
MPa |
280 |
Shear Strength |
MPa |
90 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.1 |
Water Absorption @ 23 Deg C |
% |
0.1 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
65 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform PR12
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
85 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
38 |
Compressive Strength |
MPa |
280 |
Shear Strength |
MPa |
90 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.09 |
Water Absorption @ 23 Deg C |
% |
0.1 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
65 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform F57
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
110 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
50 |
Compressive Strength |
MPa |
380 |
Shear Strength |
MPa |
125 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.5 |
Water Absorption @ 23 Deg C |
% |
0.12 |
Service Temperature Intermittent |
ᵒC |
200 |
Service Temperature Continuous |
ᵒC |
250 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform F363
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
100 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
30 |
Compressive Strength |
MPa |
280 |
Shear Strength |
MPa |
88 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.13 |
Water Absorption @ 23 Deg C |
% |
0.3 |
Service Temperature Intermittent |
ᵒC |
300 |
Service Temperature Continuous |
ᵒC |
200 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
0.2 |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform F36
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
80 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
35 |
Compressive Strength |
MPa |
340 |
Shear Strength |
MPa |
105 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.14 |
Water Absorption @ 23 Deg C |
% |
0.3 |
Service Temperature Intermittent |
ᵒC |
300 |
Service Temperature Continuous |
ᵒC |
200 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
0.2 |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform F21
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
50 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
6 |
Compressive Strength |
MPa |
180 |
Shear Strength |
MPa |
30 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.13 |
Water Absorption @ 23 Deg C |
% |
1.5 |
Service Temperature Intermittent |
ᵒC |
150 |
Service Temperature Continuous |
ᵒC |
130 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
0.2 |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |
Properties - Feroform T814
Property |
Unit of measure |
Value |
Tensile Strength |
Mpa |
80 |
Elongation at Break |
% |
- |
Modulus of Elasticity |
MPa |
- |
Impact Strength |
kj/m² |
50 |
Compressive Strength |
MPa |
310 |
Shear Strength |
MPa |
85 |
Shore Hardness |
D Scale |
- |
Co-efficient of Friction |
μ |
0.04 |
Water Absorption @ 23 Deg C |
% |
0.2 |
Service Temperature Intermittent |
ᵒC |
120 |
Service Temperature Continuous |
ᵒC |
100 |
Melting point |
ᵒC |
- |
Thermal Conductivity |
W/m.ᵒC |
- |
Dielectric Strength |
kV/mm |
- |
Volume Resistivity |
Ω.cm |
- |
Surface Resistivity |
Ω |
- |
Arc Resistance |
Sec |
- |