Feroform F57

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.


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.


Property Unit of measure Value
Tensile StrengthMpa110
Elongation at Break%
Modulus of ElasticityMPa
Impact Strengthkj/m²50
Compressive StrengthMPa380
Shear StrengthMPa125
Shore HardnessD Scale
Co-efficient of Frictionμ0.5
Water Absorption @ 23 Deg C%0.12
Service Temperature IntermittentᵒC200
Service Temperature ContinuousᵒC250
Melting pointᵒC
Thermal ConductivityW/m.ᵒC
Dielectric StrengthkV/mm
Volume ResistivityΩ.cm
Surface Resistivity
Arc ResistanceSec