Acetal Copolymer (POM-C)
POM-C is a thermoplastic, further classified as a polyoxymethylene plastic.
The properties of POM-C include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare POM-C to: polyoxymethylene plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
2.8 to 9.7 GPa 0.41 to 1.4 x 106 psi
Elongation at Break
3.0 to 65 %
Flexural Modulus
2.6 to 9.0 GPa 0.38 to 1.3 x 106 psi
Flexural Strength
83 to 170 MPa 12 to 25 x 103 psi
Impact Strength: Notched Izod
68 to 69 J/m 1.3 ft-lb/in
Tensile Strength: Ultimate (UTS)
61 to 110 MPa 8.8 to 16 x 103 psi
Other Material Properties
Density
1.4 to 1.6 g/cm3 88 to 100 lb/ft3
Limiting Oxygen Index (LOI)
15 %
Specific Heat Capacity
1130 to 1370 J/kg-K 0.27 to 0.33 BTU/lb-°F
Common Calculations
Stiffness to Weight: Axial
1.1 to 3.3 points
Stiffness to Weight: Bending
33 to 44 points
Strength to Weight: Axial
12 to 19 points
Strength to Weight: Bending
24 to 32 points
Followup Questions
Further Reading
Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999