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Color - bronze

PTFE 103 (Polytetrafluorethylene + 40% bronze).

PTFE 103 – material made of filled semi-finished thermoplastic based on polytetrafluoroethylene.

PTFE 103 has an exclusively wide temperature range (from -200°С up to +260°С), very low friction coefficient and high chemical resistance.

PTFE 103 has a «non-stick» surface and doesn’t absorb moisture. By its fillers the time-depended deformations lower than with PTFE 101 (reduction in cold flow, increased resistance to extrusion).

Besides filler - bronze powder, which increases extrusion resistance and decreases friction coefficient, the main distinctive characteristics are shown in the below table.


PTFE 103 can be used for production of U-Rings, seals, anti-extrusion back-up rings, support rings, chevron seals and guide rings. PTFE 103 mainly used in applications with high thermal and chemical stress.

This material can also be used in cases where low friction, high extrusion and deformation resistance are required, and PTFE 101 can not be used.

Mainly used

  • Seals for low friction at high stress
  • Sliding and back-up elements
  • Seal parts with elastic support (elastomers, springs)

Material Data Sheet

Properties Value Unit Standard
Hardness ≥58 Sh D ASTM D2240
Density 2,98 - 3,16 g/cm³ ASTM D792
Tensile strength ≥18 N/mm² ISO 12086 ISO 527
Elongation at break ≥200 % ISO 12086 ISO 527
Compressive strength at 1% deformation ≥8 N/mm² ASTM D695
Deformation under load at room temperature 24 hours at 13,7 N/mm² ≤8 % ASTM D621
Permanent deformation as above after 24 hours of rest atroom temperature ≤5 % ASTM D621
Coefficient of Linear Expansion ( 25° - 100°C ) 8 - 11 10-5 (mm/mm)/ °C ASTM D696
Min. service temperature -200 °C  
Max. service temperature +260 °C

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

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