FKM (Fluoroelastomer / Viton) vs PA66 GF30: 0% composition overlap. Significantly different materials serving different application areas.
FKM (Fluoroelastomer / Viton) vs PA66 GF30
Side-by-side chemical composition and mechanical property comparison.
Overview
FKM (Fluoroelastomer / Viton)
Fluoroelastomer — THE high-temperature and chemical-resistant rubber. Outstanding resistance to oils, fuels, acids, and solvents at temperatures up to 200°C (short-term 230°C). Fluorine content (64-70%) determines chemical resistance. Trade names: Viton (Chemours), Tecnoflon (Solvay), Dai-El (Daikin). 5-10x more expensive than NBR. Used for aerospace fuel seals, chemical process seals, automotive fuel injector O-rings, semiconductor processing, and any seal exposed to aggressive chemicals at high temperature.
PA66 GF30
Polyamide 66 with 30% short glass fiber — stronger and more heat-resistant than PA6 GF30 due to higher-Tm base polymer. UTS ~190 MPa dry, HDT ~250°C. THE automotive under-hood material for structural brackets. Trade names include Ultramid A3WG6 (BASF), Zytel 70G30 (DuPont), Durethan AKV 30 (LANXESS), Technyl A218 V30 (Domo). Used for engine brackets, radiator end tanks, air intake manifolds, and electrical connectors.
| FKM (Fluoroelastomer / Viton) | PA66 GF30 | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 37 | ISO 10350 |
Chemical composition (wt%) — Pro
| Element | FKM (Fluoroelastomer / Viton) | PA66 GF30 | Overlap |
|---|---|---|---|
| Vinylidene Fluoride (VDF) | 30–60% | — | — |
| Hexafluoropropylene (HFP) | 25–45% | — | — |
| Tetrafluoroethylene (TFE) | 0–30% | — | — |
| Polyamide 66 (Base Polymer) | — | 68–72% | — |
| Glass Fiber Reinforcement |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | FKM (Fluoroelastomer / Viton) | PA66 GF30 | Unit |
|---|---|---|---|
| Tensile Strength | 8–17 | 185–200 | MPa |
| Elongation | 150–350 | 3–4 | % |
| hardness_shore_a | 60–90 | — | Shore A |
| Density | |||
| continuous_service_temp | |||
| Elastic Modulus | |||
| hdt_1_8mpa | |||
| Melting Point | |||
| Tensile Strength | |||
| Tensile Modulus | |||
| Elongation at Break | |||
| Charpy Impact (notched) | |||
| Density | |||
| Melting Point | |||
| HDT/A (1.8 MPa) | |||
| Water Absorption (24h) | |||
| Glass Fiber Content |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
FKM (Fluoroelastomer / Viton) and PA66 GF30 have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is FKM (Fluoroelastomer / Viton) the same as PA66 GF30?
FKM (Fluoroelastomer / Viton) and PA66 GF30 have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace FKM (Fluoroelastomer / Viton) with PA66 GF30?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between FKM (Fluoroelastomer / Viton) and PA66 GF30?
The main differences are in the following elements: overall alloying content. FKM (Fluoroelastomer / Viton) is a Polymers grade, while PA66 GF30 is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.