Graphite-Filled PTFE

Graphite-filled PTFE materials have much better wear resistance than virgin PTFE materials with slightly higher coefficients of friction. Graphite-filled PTFE materials have better extrusion resistance than virgin PTFE materials. 

They are typically used in seal components for rotatory and reciprocating applications and can be used to seal against steel, stainless steel, chromium plating, bronze, bare or anodized aluminum and aluminum alloys, and ceramic coatings. 

PBY Material Codes: 

PB10403 - 10% Graphite-Filled PTFE 

PB10402 - 15% Graphite-Filled PTFE 

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Graphite-Filled PTFE Spec. Summary

Property Test Method Units 10 Graphite 15 Graphite
Color - - Black Black
Specific Gravity ASTM D792 - 2.100 - 2.200 2.100 - 2.200
Hardness Shore D ASTM D2240 - 61 - 71 59 - 69
Tensile Strength, min. ASTM D4745 PSI [MPa] 2,600 [17.9] 2,000 [13.8]
Elongation at Break, min. ASTM D4745 % 120 100
Second Melt Peak Temp. ASTM D3418 °F [°C] 621 [327] 621 [327]
Glass Transition Temp. ASTM D3418 °F [°C] -143 [-97]; 246 [119] -143 [-97]; 246 [119]

Material Available In:

Graphite-Filled PTFE Rods

Graphite-Filled PTFE Tubes

Graphite-Filled PTFE Sheets

Graphite-Filled PTFE Material Properties

  • Chemically Inert

  • Excellent wear properties

  • High load carrying capabilities in high-speed contact applications

  • Extreme reduction in coefficient of friction

  • Better extrusion and wear resistance than virgin PTFE materials

  • Strong Material

Typical Applications for Graphite-Filled PTFE

  • Dynamic reciprocating and rotary applications

Graphite-Filled PTFE Requirements

PB10403 meets ASTM D4745 Type I Grade 6 requirements. 

PB10402 meets ASTM D4745 Type I Grade 7 and AMS 3678/2 requirements. 

Graphite-Filled PTFE Material Data Sheet Downloads

PB10403 - Material Data Sheet

PB10402 - Material Data Sheet

Graphite-Filled PTFE Spec. Compliance



  • Wypych, George. Handbook of Polymers. 2nd Ed., ChemTec/Publishing, 2016.
  • Ebnesjjad, Sina. Fluoroplastics Vol1 & Vol2. 2nd Ed., Elsevier Inc., 2015.
  • Aerospace Materials Specifications for PTFE materials (AMS3678)
  • American Society for Testing and Materials (ASTM) Standards