The tensile strength of teflon balls varies depending on the source and specific formulation, but it generally falls within the range of 2,990–4,970 psi (20.5–35 MPa). This property makes them suitable for applications requiring durability and resistance to mechanical stress, such as seals, bearings, and chemical-resistant components. Their low friction coefficient, chemical inertness, and wide temperature tolerance further enhance their utility in industrial and engineering contexts.
Key Points Explained:
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Tensile Strength Range
- Primary Range: Most references cite a tensile strength between 2,990 psi (20.5 MPa) and 4,970 psi (35 MPa), with some sources specifying 3,900 psi as a midpoint.
- Factors Influencing Variability: Differences may arise from manufacturing processes (e.g., molding vs. machining) or additives (e.g., glass-filled PTFE for enhanced strength).
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Comparative Metrics
- Yield Strength: ~20.5 MPa (critical for deformation resistance).
- Elongation at Break: 300–550%, indicating high ductility.
- Compressive Strength: 10–20 MPa, relevant for load-bearing applications.
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Complementary Properties
- Low Friction: Static/dynamic coefficients of 0.04–0.08 and 0.02–0.06, respectively, reducing wear.
- Chemical Resistance: Inert to most caustic substances, ideal for seals in harsh environments.
- Temperature Tolerance: Melting point of 327°C and heat deflection at 120°C.
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Practical Implications
- Seals and Bearings: High tensile strength ensures longevity under cyclic stress.
- Machinability: Can be customized to precise dimensions without compromising integrity.
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Standards and Testing
- ASTM D638 is commonly used to measure tensile strength in polymers like PTFE.
- Variations may reflect testing conditions (e.g., temperature, humidity).
For purchasers, balancing tensile strength with other properties (e.g., friction, thermal stability) ensures optimal performance for specific use cases.
Summary Table:
| Property | Value Range |
|---|---|
| Tensile Strength | 2,990–4,970 psi (20.5–35 MPa) |
| Yield Strength | ~20.5 MPa |
| Elongation at Break | 300–550% |
| Compressive Strength | 10–20 MPa |
| Friction Coefficient | 0.04–0.08 (static), 0.02–0.06 (dynamic) |
| Temperature Tolerance | Up to 327°C (melting point) |
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