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.
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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″
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 | 0.70 – 1.6 | 0.77 – 2.3 |
| Deflection Temperature Under Load @ 264 psi | °F | D648 | 208 – 230 | 199 – 320 |
| Maximum continuous service temp in air | °F | D794 | 207 – 212 | 185 – 302 |
| Water absorption @ 73°F – 24 hours | % | D570 | 0.11 – 0.27 | 0.16 – 0.26 |
| Compressive strength | psi | D695 | 4,400 – 16,000 | 5,200 – 16,000 |
| Coefficient of linear thermal expansion (CLTE) | (in/in°F) | D696 | 7.2E-6 to 7.4E-5 | 5.4E-5 to 5.6E-5 |
| 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 |
*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.
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