Acetal, also known as POM (Polyoxymethylene), is a semi-crystalline engineering thermoplastic material, with a continuous use temperature range of up to 180° F (82° C). Acetal offers high strength and stiffness coupled with high dimensional stability and ease of machining.
Benefits of Acetal (Polyoxymethylene, POM)
Strength/Rigidity
Dimensional Stability
Low Moisture Absorption
Wear Resistant
Dimensions: 12″ x 12″, 12″ x 24″, 12″ x 48″, 24″ x 24″, 24″ x 48″, 48″ x 96″, 48″ x 120″
Thickness: 0.030″ – 6″
Round
Diameter: 0.125″ – 14″
Hex
Diameter: 0.25″ – 1.125″
Square
Width: 0.375″ – 1″
Outside Diameter: 3″ – 8.5″
Technical Resources
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- Thermosets vs Thermoplastics: How They Differ
- Homopolymer vs Copolymer
- Plastics Pyramid
- Amorphous vs Semicrystalline
- Fiber Reinforced Panel Alternatives
- How To Choose the Right Plastic for Your Project
- LEXAN™ CLINIWALL™: Next Generation Wall Cladding
- BioPhorum, Polymershapes, and the Future of Material Sterilization
- Design for Manufacturability and Its Importance
Suppliers / Brands
Common Applications
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Aerospace
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Automotive
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Bearings & Bushings
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Bus & Rail
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Chemical Processing
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Food & Beverage Preparation/Processing
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Forestry and Lumber Plastics
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Gaskets & Seals
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Gears
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Heavy Equipment
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Machine Shops
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Medical Packaging
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Oil & Gas
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Packaging & Conveying Equipment
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Prototyping & Tooling
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Recreational Vehicles
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Semiconductors & Electronics
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Sporting Goods
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Valves & Fittings
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Watercraft
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Wear Strips
Physical Properties
| Units | ASTM Test | Copolymer ACETAL | Homopolymer ACETAL | |
|---|---|---|---|---|
| Tensile strength @ break @ 73°F | psi | D638 | 4,500 – 9,690 | 7,000 – 9,800 |
| Flexural modulus @ 73°F | psi | D790 | 264,000 – 434,000 | 305,000 – 464,000 |
| Izod impact (notched) | ft-lbs/in of notch | D256 | 264,000 – 434,000 | 0.77 – 2.3 |
| Deflection Temperature Under Load @ 264 psi Unannealed | ft-lbs/in of notch | D658 | 208 – 230 | 199 – 320 |
| Coefficient of linear thermal expansion (CLTE) | (in/in F) | D696 | 7.2E-6 to 7.4E-5 | 5.4E-5 to 5.6E-5 |
| Compressive strength | psi | D695 | 4,400 – 16,000 | 4,400 – 16,000 |
| Coefficient of friction | D1894 | 0.005 – 0.46 | 0.070 – 0.25 | |
| Taber Abrasion Resistance | mg | D1044 | 13.8 – 14.0 | 12.8 – 13.1 |
| Water absorption – 24 hours – 1/8″ thick | 0.036 – 0.11% | D570 | 0.11 – 0.27 | 0.16 – 0.26 |
| Compressive strength | psi | D695 | 4,400 – 16,000 | 4,400 – 16,000 |
* Technical Data is provided courtesy of UL Prospector (www.ulprospector.com) and IAPD (www.IAPD.org).
Data is to be considered representative and is provided for guidance only. All product performance must be verified by the user under actual application conditions.
