Acetal Homopolymer

Acetal Homopolymer


What is the Material: Acetal Homopolymer Unfilled semi-crystalline material and it is the homopolymer 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 is fitting in applications requiring slightly higher hardness and strength compared to acetal copolymer. This material has more prominent center-line porosity than acetal copolymer. Nylon materials typically perform better than acetal materials in abrasive wear applications.


Property Value Typical ASTM Test
Chemical Designation (POM-H) Polyoxymethylene Homopolymer
Trade Names (®, ™) Delrin, Sustarin H
Color Natual White, Black
Density (g/cm^3) 1.41 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 350000 D 638
Tensile Strength at Yield (psi) 11000 D 638
Elongation at Break (%) 25 D 638
Flexural Strength (psi) 14000 D 790
Modulus of Elasticity (Flexural Test) (psi) 420000 D 790
Compression Strength: 10% Strain (psi) 15500 D 695
Compression Strength: 1% Strain (psi) 3600 D 695
Compression Modulus (psi) 325000 D 695
Impact Strength (Izod) (ft-lbs/in) 1.5 D 256
Hardness (R) 120 D 785
Hardness (M) 94 D 785
Coefficient of Friction (Kinetic, 40 psi, 50 fpm) 0.2 D 3702
Wear (K) Factor (in^3-min/ft-lbs-hr) (Against Steel, 40 psi, 50 fpm) 5.50E-9 D 3702


Property Value Typical ASTM Test
Melting Point (°F) 347 D 3418
Deflection Temperature (°F) (66 psi) 336 D 648
Deflection Temperature (°F) (264 psi) 257 D 648
Service Temperature Continuous (°F) 185
Service Temperature Intermittent (°F) 300
Thermal Expansion (CLTE) (in/in/°F) 6.80E-5 D 696
Specific Heat (BTU/lb-°F) 0.35


Property Value Typical ASTM Test
Volume Resistivity (Ω*cm) 1.00E15 D 257
Dielectric Strength (V/mil) 500 D 149
Dissipation Factor (60 Hz) 0.005 D 150
Dielectric Constant (60 Hz and 50% RH) 3.7 D 150


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.25 D 570
Moisture Absorption (%) (Saturated) 0.9 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.