ASA (Acrylonitrile-Styrene-Acrylate) vs FKM (Fluoroelastomer / Viton): 0% composition overlap. Significantly different materials serving different application areas.
ASA (Acrylonitrile-Styrene-Acrylate) vs FKM (Fluoroelastomer / Viton)
Side-by-side chemical composition and mechanical property comparison.
Overview
ASA (Acrylonitrile-Styrene-Acrylate)
UV-resistant alternative to ABS — acrylic rubber replaces butadiene for excellent weatherability. Retains color and gloss outdoors for years without coating. Similar mechanical properties to ABS but with 10× better UV resistance. Trade names: Luran S (BASF/INEOS), Geloy (SABIC). Used for automotive exterior trim, outdoor electrical housings, garden furniture, and building cladding.
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.
| ASA (Acrylonitrile-Styrene-Acrylate) | FKM (Fluoroelastomer / Viton) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 6402 | ISO 37 |
Chemical composition (wt%) — Pro
| Element | ASA (Acrylonitrile-Styrene-Acrylate) | FKM (Fluoroelastomer / Viton) | Overlap |
|---|---|---|---|
| Acrylonitrile | 20–30% | — | — |
| Styrene | 40–60% | — | — |
| Acrylate Elastomer | 15–30% | — | — |
| Vinylidene Fluoride (VDF) | — | 30–60% | — |
| Hexafluoropropylene (HFP) | |||
| Tetrafluoroethylene (TFE) |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | ASA (Acrylonitrile-Styrene-Acrylate) | FKM (Fluoroelastomer / Viton) | Unit |
|---|---|---|---|
| Tensile Strength | 40–55 | 8–17 | MPa |
| Elongation | 15–35 | 150–350 | % |
| Elastic Modulus | 2200–2600 | — | MPa |
| Density | |||
| hardness_shore_a | |||
| continuous_service_temp |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
ASA (Acrylonitrile-Styrene-Acrylate) and FKM (Fluoroelastomer / Viton) 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 ASA (Acrylonitrile-Styrene-Acrylate) the same as FKM (Fluoroelastomer / Viton)?
ASA (Acrylonitrile-Styrene-Acrylate) and FKM (Fluoroelastomer / Viton) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace ASA (Acrylonitrile-Styrene-Acrylate) with FKM (Fluoroelastomer / Viton)?
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 ASA (Acrylonitrile-Styrene-Acrylate) and FKM (Fluoroelastomer / Viton)?
The main differences are in the following elements: overall alloying content. ASA (Acrylonitrile-Styrene-Acrylate) is a Polymers grade, while FKM (Fluoroelastomer / Viton) is a Polymers grade.
View full data for each material:
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.