Acetal Copolymer


What is the Material: Acetal Copolymer Unfilled is a semi-crystalline material and it is the copolymer version of acetal.

Key Material Features: This material is beneficial in applications requiring mechanical strength, rigidity, wear resistance, low moisture absorption, and dimensional stability.

Other Considerations: It typically is lower in cost, easier to machine, and has less center-line porosity than acetal homopolymer. Nylon materials typically perform better than acetal materials in abrasive wear applications.



Property Value Typical ASTM Test
Chemical Designation (POM-C) Polyoxymethylene Copolymer
Trade Names (®, ™) Sustarin C, Acetron, Tecaform, Unital, ZL, Pomalux
Color White, Black, Blue, Various colors
Density (g/cm^3) 1.41 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 330000 D 638
Tensile Strength at Yield (psi) 9300 D 638
Tensile Strength at Break (psi) 9700 D 638
Elongation at Yield (%) 9 D 638
Elongation at Break (%) 40 D 638
Flexural Strength (psi) 13000 D 790
Modulus of Elasticity (Flexural Test) (psi) 400000 D 790
Compression Strength: 10% Strain (psi) 12000 D 695
Compression Strength: 1% Strain (psi) 2500 D 695
Compression Modulus (psi) 250000 D 695
Impact Strength (Izod) (ft-lbs/in) 1 D 256
Hardness (R) 120 D 785
Hardness (M) 86 D 785
Coefficient of Friction (Kinetic, 40 psi, 50 fpm) 0.21 D 3702
Wear (K) Factor (in^3-min/ft-lbs-hr) (Against Steel, 40 psi, 50 fpm) 6.50E-9 D 3702


Property Value Typical ASTM Test
Melting Point (°F) 329 D 3418
Deflection Temperature (°F) (66 psi) 316 D 648
Deflection Temperature (°F) (264 psi) 230 D 648
Service Temperature Continuous (°F) 195
Service Temperature Intermittent (°F) 285
Thermal Expansion (CLTE) (in/in/°F) 4.70E-5 D 696


Property Value Typical ASTM Test
Volume Resistivity (Ω*cm) 1.00E14 D 257
Dielectric Strength (V/mil) 500 D 149
Dissipation Factor (60 Hz) 0.001 D 150
Dissipation Factor (1MHz) 0.005 D 150
Dielectric Constant (60 Hz and 50% RH) 3.7 D 150


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.18 D 570
Moisture Absorption (%) (Saturated) 0.8 D 570
Flammability HB
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.