FKM (Fluoroelastomer / Viton) vs POM-H (Acetal Homopolymer): 0% composition overlap. Significantly different materials serving different application areas.
FKM (Fluoroelastomer / Viton) vs POM-H (Acetal Homopolymer)
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.
POM-H (Acetal Homopolymer)
Polyoxymethylene Homopolymer — slightly stronger and stiffer than POM-C copolymer but with centerline porosity in stock shapes and lower resistance to hot water/alkalis. Trade names include Delrin (DuPont/DuPont de Nemours) and Tenac (Asahi Kasei). Used for gears, cams, springs, clips, fuel system components, and precision-machined parts where maximum stiffness is needed.
| FKM (Fluoroelastomer / Viton) | POM-H (Acetal Homopolymer) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 37 | ISO 10350 |
Mechanical properties
| Property | FKM (Fluoroelastomer / Viton) | POM-H (Acetal Homopolymer) | Unit |
|---|---|---|---|
| tensile_strength | 8–17 | 66–73 | MPa |
| elongation | 150–350 | 15–25 | % |
| hardness_shore_a | 60–90 | — | Shore A |
Compatibility Assessment
FKM (Fluoroelastomer / Viton) and POM-H (Acetal Homopolymer) 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 POM-H (Acetal Homopolymer)?
FKM (Fluoroelastomer / Viton) and POM-H (Acetal Homopolymer) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace FKM (Fluoroelastomer / Viton) with POM-H (Acetal Homopolymer)?
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 POM-H (Acetal Homopolymer)?
The main differences are in the following elements: overall alloying content. FKM (Fluoroelastomer / Viton) is a Polymers grade, while POM-H (Acetal Homopolymer) is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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